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<name>corepost</name>
<comment></comment>
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Argument validation
===================
CorePost integrates the popular 'formencode' package to implement form and query argument validation.
Validators can be specified using a *formencode* Schema object, or via custom field-specific validators.
Example::
from corepost.web import validate, route
from corepost.enums import Http
from formencode import Schema, validators
class TestSchema(Schema):
allow_extra_fields = True
childId = validators.Regex(regex="^value1|value2$")
class MyApp():
@route("/validate/<int:rootId>/schema",Http.POST)
@validate(schema=TestSchema())
def postValidateSchema(self,request,rootId,childId,**kwargs):
'''Validate using a common schema'''
return "%s - %s - %s" % (rootId,childId,kwargs)
@route("/validate/<int:rootId>/custom",Http.POST)
@validate(childId=validators.Regex(regex="^value1|value2$"))
def postValidateCustom(self,request,rootId,childId,**kwargs):
'''Validate using argument-specific validators'''
return "%s - %s - %s" % (rootId,childId,kwargs)
Please see the *FormEncode* documentation:
http://www.formencode.org/en/latest/Validator.html
for list of available validators:
* Common : http://www.formencode.org/en/latest/modules/validators.html#module-formencode.validators
* National : http://www.formencode.org/en/latest/modules/national.html#module-formencode.national
Asynchronous Operations
=================
@defer.inlineCallbacks support
-----------------------
If you want a deferred async method, just use *defer.returnValue()*::
@route("/",Http.GET)
@defer.inlineCallbacks
def root(self,request,**kwargs):
val1 = yield db.query("SELECT ....")
val2 = yield db.query("SELECT ....")
defer.returnValue(val1 + val2)
This is standard Twisted functionality.
Content types
=============
CorePost integrates support for JSON, YAML and XML (partially) based on request content types.
Parsing of incoming content
---------------------------
Based on the incoming content type in POST/PUT requests,
the body will be automatically parsed to JSON, YAML and XML (ElementTree)
* request.json
* request.yaml
* request.xml
and attached to the request::
@route("/post/json",(Http.POST,Http.PUT))
def test_json(self,request,**kwargs):
return "%s" % json.dumps(request.json)
@route("/post/xml",(Http.POST,Http.PUT))
def test_xml(self,request,**kwargs):
return "%s" % ElementTree.tostring(request.xml)
@route("/post/yaml",(Http.POST,Http.PUT))
def test_yaml(self,request,**kwargs):
return "%s" % yaml.dump(request.yaml)
Converting Python objects to expected content type
--------------------------------------------------
Instead of returning string responses, the code can just return Python objects.
Depending whether the caller can accept JSON (default) or YAML, the Python objects will be automatically converted::
@route("/return/by/accept")
def test_return_content_by_accepts(self,request,**kwargs):
val = [{"test1":"Test1"},{"test2":"Test2"}]
return val
Calling this URL with "Accept: application/json" will return:
::
[{"test1": "Test1"}, {"test2": "Test2"}]
Calling it with "Accept: text/yaml" will return:
::
- {test1: Test1}
- {test2: Test2}
Filters
=======
There is support for CorePost resource filters via the two following *corepost.filter* interfaces::
class IRequestFilter(Interface):
"""Request filter interface"""
def filterRequest(self,request):
"""Allows to intercept and change an incoming request"""
pass
class IResponseFilter(Interface):
"""Response filter interface"""
def filterResponse(self,request,response):
"""Allows to intercept and change an outgoing response"""
pass
A filter class can implement either of them or both (for a wrap around filter), e.g.::
class AddCustomHeaderFilter():
"""Implements a request filter that adds a custom header to the incoming request"""
zope.interface.implements(IRequestFilter)
def filterRequest(self,request):
request.received_headers["Custom-Header"] = "Custom Header Value"
class Change404to503Filter():
"""Implements just a response filter that changes 404 to 503 statuses"""
zope.interface.implements(IResponseFilter)
def filterResponse(self,request,response):
if response.code == 404:
response.code = 503
class WrapAroundFilter():
"""Implements both types of filters in one class"""
zope.interface.implements(IRequestFilter,IResponseFilter)
def filterRequest(self,request):
request.received_headers["X-Wrap-Input"] = "Input"
def filterResponse(self,request,response):
response.headers["X-Wrap-Output"] = "Output"
In order to activate the filters on a RESTResource instance, you need to pass a list of them in the constructor as the *filters* parameter, e.g.::
class FilterApp:
@route("/",Http.GET)
def root(self,request,**kwargs):
return request.received_headers
def run_filter_app():
app = RESTResource(services=(FilterApp(),),filters=(Change404to503Filter(),AddCustomHeaderFilter(),WrapAroundFilter(),))
app.run(8083)
HTTP codes
==========
By default, CorePost returns the appropriate HTTP code based on the HTTP method:
Success:
* 200 (OK) - GET, DELETE, PUT
* 201 (Created) - POST
Errors:
* 404 - not able to match any URL.
* 400 - missing mandatory argument (driven from the arguments on the actual functions)
* 400 - argument failed validation
* 500 - server error
CorePost CorePost
==================================== ====================================
REST micro-framework, powered by the asynchronous Twisted Web APIs A Twisted REST micro-framework
------------------------------------------------------------------ ------------------------------
Contents:
.. toctree:: .. toctree::
:maxdepth: 4 :maxdepth: 4
intro intro
features
Indices and tables Features
================== --------
* :ref:`genindex` .. toctree::
* :ref:`modindex` :maxdepth: 4
* :ref:`search`
url_routing
arguments
content_types
filters
http_codes
async
modules
Modular REST applications
=========================
A typical case in REST is where you have parent/child resources (business entities), e.g.
::
Customer
Customer Address
Customer Phone
Customer Order
Customer Invoice
Customer Invoice Payment
etc.
This can create a URL structure like:
::
/customer
/customer/<customerId>
/customer/<customerId>/address
/customer/<customerId>/address/<addressId>
/customer/<customerId>/phone
/customer/<customerId>/phone/<phoneId>
/customer/<customerId>/invoice
/customer/<customerId>/invoice/<invoiceId>
/customer/<customerId>/invoice/<invoiceId>/payment
/customer/<customerId>/invoice/<invoiceId>/payment/<paymentId>
CorePost allows you to write small, modular classes that implement a REST service for just a single entity,
driven by URL paths with dynamic elements in them (e.g. the *customerId*, *invoiceId*, *paymentId* path parameters in the sample above).
You do not have to mesh all these different entities in a single class.
At the end, you wrap all of the different REST services in a single *RESTResource* object (which extends the regular Twisted Web Resource object)
and it takes care of routing the request to the appropriate class.
Here is a full-blown example of two REST services for Customer and Customer Address::
from corepost import Response, NotFoundException, AlreadyExistsException
from corepost.web import RESTResource, route, Http
class CustomerRESTService():
path = "/customer"
@route("/")
def getAll(self,request):
return DB.getAllCustomers()
@route("/<customerId>")
def get(self,request,customerId):
return DB.getCustomer(customerId)
@route("/",Http.POST)
def post(self,request,customerId,firstName,lastName):
customer = Customer(customerId, firstName, lastName)
DB.saveCustomer(customer)
return Response(201)
@route("/<customerId>",Http.PUT)
def put(self,request,customerId,firstName,lastName):
c = DB.getCustomer(customerId)
(c.firstName,c.lastName) = (firstName,lastName)
return Response(200)
@route("/<customerId>",Http.DELETE)
def delete(self,request,customerId):
DB.deleteCustomer(customerId)
return Response(200)
@route("/",Http.DELETE)
def deleteAll(self,request):
DB.deleteAllCustomers()
return Response(200)
class CustomerAddressRESTService():
path = "/customer/<customerId>/address"
@route("/")
def getAll(self,request,customerId):
return DB.getCustomer(customerId).addresses
@route("/<addressId>")
def get(self,request,customerId,addressId):
return DB.getCustomerAddress(customerId, addressId)
@route("/",Http.POST)
def post(self,request,customerId,addressId,streetNumber,streetName,stateCode,countryCode):
c = DB.getCustomer(customerId)
address = CustomerAddress(streetNumber,streetName,stateCode,countryCode)
c.addresses[addressId] = address
return Response(201)
@route("/<addressId>",Http.PUT)
def put(self,request,customerId,addressId,streetNumber,streetName,stateCode,countryCode):
address = DB.getCustomerAddress(customerId, addressId)
(address.streetNumber,address.streetName,address.stateCode,address.countryCode) = (streetNumber,streetName,stateCode,countryCode)
return Response(200)
@route("/<addressId>",Http.DELETE)
def delete(self,request,customerId,addressId):
DB.getCustomerAddress(customerId, addressId) #validate address exists
del(DB.getCustomer(customerId).addresses[addressId])
return Response(200)
@route("/",Http.DELETE)
def deleteAll(self,request,customerId):
c = DB.getCustomer(customerId)
c.addresses = {}
return Response(200)
def run_rest_app():
app = RESTResource((CustomerRESTService(),CustomerAddressRESTService()))
app.run(8080)
if __name__ == "__main__":
run_rest_app()
URL Routing
=================
@route decorator
----------------
Via a simple *@route* decorator you can automatically route *twisted.web* Request objects to your class method
based on URL (with dynamic paths), HTTP method, expected content type, etc::
from corepost.web import route, RESTResource
from corepost.enums import Http
class RESTService():
@route("/",Http.GET)
def root(self,request,**kwargs):
return request.path
@route("/test",Http.GET)
def test(self,request,**kwargs):
return request.path
@route("/test/<int:numericid>",Http.GET)
def test_get_resources(self,request,numericid,**kwargs):
return "%s" % numericid
if __name__ == '__main__':
app = RESTResource((RESTService,))
app.run()
*Note*:
This piece of code::
app.run()
is just for convenience when showing code samples and writing unit tests.
In a real production application you would use existing Twisted *twistd* functionality:
* http://twistedmatrix.com/documents/current/core/howto/basics.html
* http://twistedmatrix.com/documents/current/core/howto/application.html
* http://twistedmatrix.com/documents/current/core/howto/tap.html
Path argument extraction
----------------
CorePort can easily extract path arguments from an URL and convert them to the desired type.
The supported types are:
* *int*
* *float*
* *string*
Example::
@route("/int/<int:intarg>/float/<float:floatarg>/string/<stringarg>",Http.GET)
def test(self,request,intarg,floatarg,stringarg,**kwargs):
pass
Routing requests by incoming content type
-----------------------------------------
Based on the incoming content type in POST/PUT requests, the *same* URL can be hooked up to different router methods::
@route("/post/by/content",(Http.POST,Http.PUT),MediaType.APPLICATION_JSON)
def test_content_app_json(self,request,**kwargs):
return request.received_headers[HttpHeader.CONTENT_TYPE]
@route("/post/by/content",(Http.POST,Http.PUT),(MediaType.TEXT_XML,MediaType.APPLICATION_XML))
def test_content_xml(self,request,**kwargs):
return request.received_headers[HttpHeader.CONTENT_TYPE]
@route("/post/by/content",(Http.POST,Http.PUT),MediaType.TEXT_YAML)
def test_content_yaml(self,request,**kwargs):
return request.received_headers[HttpHeader.CONTENT_TYPE]
@route("/post/by/content",(Http.POST,Http.PUT))
def test_content_catch_all(self,request,**kwargs):
return MediaType.WILDCARD
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<div class="section" id="argument-validation">
<h1>Argument validation<a class="headerlink" href="#argument-validation" title="Permalink to this headline"></a></h1>
<p>CorePost integrates the popular &#8216;formencode&#8217; package to implement form and query argument validation.
Validators can be specified using a <em>formencode</em> Schema object, or via custom field-specific validators.</p>
<p>Example:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">corepost.web</span> <span class="kn">import</span> <span class="n">validate</span><span class="p">,</span> <span class="n">route</span>
<span class="kn">from</span> <span class="nn">corepost.enums</span> <span class="kn">import</span> <span class="n">Http</span>
<span class="kn">from</span> <span class="nn">formencode</span> <span class="kn">import</span> <span class="n">Schema</span><span class="p">,</span> <span class="n">validators</span>
<span class="k">class</span> <span class="nc">TestSchema</span><span class="p">(</span><span class="n">Schema</span><span class="p">):</span>
<span class="n">allow_extra_fields</span> <span class="o">=</span> <span class="bp">True</span>
<span class="n">childId</span> <span class="o">=</span> <span class="n">validators</span><span class="o">.</span><span class="n">Regex</span><span class="p">(</span><span class="n">regex</span><span class="o">=</span><span class="s">&quot;^value1|value2$&quot;</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">MyApp</span><span class="p">():</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/validate/&lt;int:rootId&gt;/schema&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">)</span>
<span class="nd">@validate</span><span class="p">(</span><span class="n">schema</span><span class="o">=</span><span class="n">TestSchema</span><span class="p">())</span>
<span class="k">def</span> <span class="nf">postValidateSchema</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">rootId</span><span class="p">,</span><span class="n">childId</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="sd">&#39;&#39;&#39;Validate using a common schema&#39;&#39;&#39;</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s"> - </span><span class="si">%s</span><span class="s"> - </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">rootId</span><span class="p">,</span><span class="n">childId</span><span class="p">,</span><span class="n">kwargs</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/validate/&lt;int:rootId&gt;/custom&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">)</span>
<span class="nd">@validate</span><span class="p">(</span><span class="n">childId</span><span class="o">=</span><span class="n">validators</span><span class="o">.</span><span class="n">Regex</span><span class="p">(</span><span class="n">regex</span><span class="o">=</span><span class="s">&quot;^value1|value2$&quot;</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">postValidateCustom</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">rootId</span><span class="p">,</span><span class="n">childId</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="sd">&#39;&#39;&#39;Validate using argument-specific validators&#39;&#39;&#39;</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s"> - </span><span class="si">%s</span><span class="s"> - </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">rootId</span><span class="p">,</span><span class="n">childId</span><span class="p">,</span><span class="n">kwargs</span><span class="p">)</span>
</pre></div>
</div>
<p>Please see the <em>FormEncode</em> documentation:</p>
<p><a class="reference external" href="http://www.formencode.org/en/latest/Validator.html">http://www.formencode.org/en/latest/Validator.html</a></p>
<p>for list of available validators:</p>
<ul class="simple">
<li>Common : <a class="reference external" href="http://www.formencode.org/en/latest/modules/validators.html#module-formencode.validators">http://www.formencode.org/en/latest/modules/validators.html#module-formencode.validators</a></li>
<li>National : <a class="reference external" href="http://www.formencode.org/en/latest/modules/national.html#module-formencode.national">http://www.formencode.org/en/latest/modules/national.html#module-formencode.national</a></li>
</ul>
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<div class="section" id="asynchronous-operations">
<h1>Asynchronous Operations<a class="headerlink" href="#asynchronous-operations" title="Permalink to this headline"></a></h1>
<div class="section" id="defer-inlinecallbacks-support">
<h2>&#64;defer.inlineCallbacks support<a class="headerlink" href="#defer-inlinecallbacks-support" title="Permalink to this headline"></a></h2>
<p>If you want a deferred async method, just use <em>defer.returnValue()</em>:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="nd">@defer.inlineCallbacks</span>
<span class="k">def</span> <span class="nf">root</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="n">val1</span> <span class="o">=</span> <span class="k">yield</span> <span class="n">db</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="s">&quot;SELECT ....&quot;</span><span class="p">)</span>
<span class="n">val2</span> <span class="o">=</span> <span class="k">yield</span> <span class="n">db</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="s">&quot;SELECT ....&quot;</span><span class="p">)</span>
<span class="n">defer</span><span class="o">.</span><span class="n">returnValue</span><span class="p">(</span><span class="n">val1</span> <span class="o">+</span> <span class="n">val2</span><span class="p">)</span>
</pre></div>
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<p>This is standard Twisted functionality.</p>
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<div class="section" id="content-types">
<h1>Content types<a class="headerlink" href="#content-types" title="Permalink to this headline"></a></h1>
<p>CorePost integrates support for JSON, YAML and XML (partially) based on request content types.</p>
<div class="section" id="parsing-of-incoming-content">
<h2>Parsing of incoming content<a class="headerlink" href="#parsing-of-incoming-content" title="Permalink to this headline"></a></h2>
<p>Based on the incoming content type in POST/PUT requests,
the body will be automatically parsed to JSON, YAML and XML (ElementTree)</p>
<ul class="simple">
<li>request.json</li>
<li>request.yaml</li>
<li>request.xml</li>
</ul>
<p>and attached to the request:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/json&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_json</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">json</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">json</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/xml&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_xml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">ElementTree</span><span class="o">.</span><span class="n">tostring</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">xml</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/yaml&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_yaml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">yaml</span><span class="o">.</span><span class="n">dump</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">yaml</span><span class="p">)</span>
</pre></div>
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<div class="section" id="converting-python-objects-to-expected-content-type">
<h2>Converting Python objects to expected content type<a class="headerlink" href="#converting-python-objects-to-expected-content-type" title="Permalink to this headline"></a></h2>
<p>Instead of returning string responses, the code can just return Python objects.
Depending whether the caller can accept JSON (default) or YAML, the Python objects will be automatically converted:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/return/by/accept&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_return_content_by_accepts</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="n">val</span> <span class="o">=</span> <span class="p">[{</span><span class="s">&quot;test1&quot;</span><span class="p">:</span><span class="s">&quot;Test1&quot;</span><span class="p">},{</span><span class="s">&quot;test2&quot;</span><span class="p">:</span><span class="s">&quot;Test2&quot;</span><span class="p">}]</span>
<span class="k">return</span> <span class="n">val</span>
</pre></div>
</div>
<p>Calling this URL with &#8220;Accept: application/json&#8221; will return:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="p">[{</span><span class="s">&quot;test1&quot;</span><span class="p">:</span> <span class="s">&quot;Test1&quot;</span><span class="p">},</span> <span class="p">{</span><span class="s">&quot;test2&quot;</span><span class="p">:</span> <span class="s">&quot;Test2&quot;</span><span class="p">}]</span>
</pre></div>
</div>
<p>Calling it with &#8220;Accept: text/yaml&#8221; will return:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="o">-</span> <span class="p">{</span><span class="n">test1</span><span class="p">:</span> <span class="n">Test1</span><span class="p">}</span>
<span class="o">-</span> <span class="p">{</span><span class="n">test2</span><span class="p">:</span> <span class="n">Test2</span><span class="p">}</span>
</pre></div>
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<li><a class="reference internal" href="#converting-python-objects-to-expected-content-type">Converting Python objects to expected content type</a></li>
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Argument validation
===================
CorePost integrates the popular 'formencode' package to implement form and query argument validation.
Validators can be specified using a *formencode* Schema object, or via custom field-specific validators.
Example::
from corepost.web import validate, route
from corepost.enums import Http
from formencode import Schema, validators
class TestSchema(Schema):
allow_extra_fields = True
childId = validators.Regex(regex="^value1|value2$")
class MyApp():
@route("/validate/<int:rootId>/schema",Http.POST)
@validate(schema=TestSchema())
def postValidateSchema(self,request,rootId,childId,**kwargs):
'''Validate using a common schema'''
return "%s - %s - %s" % (rootId,childId,kwargs)
@route("/validate/<int:rootId>/custom",Http.POST)
@validate(childId=validators.Regex(regex="^value1|value2$"))
def postValidateCustom(self,request,rootId,childId,**kwargs):
'''Validate using argument-specific validators'''
return "%s - %s - %s" % (rootId,childId,kwargs)
Please see the *FormEncode* documentation:
http://www.formencode.org/en/latest/Validator.html
for list of available validators:
* Common : http://www.formencode.org/en/latest/modules/validators.html#module-formencode.validators
* National : http://www.formencode.org/en/latest/modules/national.html#module-formencode.national
Asynchronous Operations
=================
@defer.inlineCallbacks support
-----------------------
If you want a deferred async method, just use *defer.returnValue()*::
@route("/",Http.GET)
@defer.inlineCallbacks
def root(self,request,**kwargs):
val1 = yield db.query("SELECT ....")
val2 = yield db.query("SELECT ....")
defer.returnValue(val1 + val2)
This is standard Twisted functionality.
Content types
=============
CorePost integrates support for JSON, YAML and XML (partially) based on request content types.
Parsing of incoming content
---------------------------
Based on the incoming content type in POST/PUT requests,
the body will be automatically parsed to JSON, YAML and XML (ElementTree)
* request.json
* request.yaml
* request.xml
and attached to the request::
@route("/post/json",(Http.POST,Http.PUT))
def test_json(self,request,**kwargs):
return "%s" % json.dumps(request.json)
@route("/post/xml",(Http.POST,Http.PUT))
def test_xml(self,request,**kwargs):
return "%s" % ElementTree.tostring(request.xml)
@route("/post/yaml",(Http.POST,Http.PUT))
def test_yaml(self,request,**kwargs):
return "%s" % yaml.dump(request.yaml)
Converting Python objects to expected content type
--------------------------------------------------
Instead of returning string responses, the code can just return Python objects.
Depending whether the caller can accept JSON (default) or YAML, the Python objects will be automatically converted::
@route("/return/by/accept")
def test_return_content_by_accepts(self,request,**kwargs):
val = [{"test1":"Test1"},{"test2":"Test2"}]
return val
Calling this URL with "Accept: application/json" will return:
::
[{"test1": "Test1"}, {"test2": "Test2"}]
Calling it with "Accept: text/yaml" will return:
::
- {test1: Test1}
- {test2: Test2}
Features
=================
Here is a breakdown of key CorePost features
URL Routing
-----------
@route decorator
^^^^^^^^^^^^^^^^
Via a simple *@route* decorator you can automatically route *twisted.web* Request objects to your class method
based on URL (with dynamic paths), HTTP method, expected content type, etc::
from corepost.web import route, RESTResource
from corepost.enums import Http
class RESTService():
@route("/",Http.GET)
def root(self,request,**kwargs):
return request.path
@route("/test",Http.GET)
def test(self,request,**kwargs):
return request.path
@route("/test/<int:numericid>",Http.GET)
def test_get_resources(self,request,numericid,**kwargs):
return "%s" % numericid
if __name__ == '__main__':
app = RESTResource((RESTService,))
app.run()
*Note*:
This piece of code::
app.run()
is just for convenience when showing code samples and writing unit tests.
In a real production application you would use existing Twisted *twistd* functionality:
* http://twistedmatrix.com/documents/current/core/howto/basics.html
* http://twistedmatrix.com/documents/current/core/howto/application.html
* http://twistedmatrix.com/documents/current/core/howto/tap.html
Path argument extraction
^^^^^^^^^^^^^^^^^^^^^^^^
CorePort can easily extract path arguments from an URL and convert them to the desired type.
The supported types are:
* *int*
* *float*
* *string*
Example::
@route("/int/<int:intarg>/float/<float:floatarg>/string/<stringarg>",Http.GET)
def test(self,request,intarg,floatarg,stringarg,**kwargs):
pass
Argument validation
^^^^^^^^^^^^^^^^^^^
CorePost integrates the popular 'formencode' package to implement form and query argument validation.
Validators can be specified using a *formencode* Schema object, or via custom field-specific validators.
Example::
from corepost.web import validate, route
from corepost.enums import Http
from formencode import Schema, validators
class TestSchema(Schema):
allow_extra_fields = True
childId = validators.Regex(regex="^value1|value2$")
class MyApp():
@route("/validate/<int:rootId>/schema",Http.POST)
@validate(schema=TestSchema())
def postValidateSchema(self,request,rootId,childId,**kwargs):
'''Validate using a common schema'''
return "%s - %s - %s" % (rootId,childId,kwargs)
@route("/validate/<int:rootId>/custom",Http.POST)
@validate(childId=validators.Regex(regex="^value1|value2$"))
def postValidateCustom(self,request,rootId,childId,**kwargs):
'''Validate using argument-specific validators'
return "%s - %s - %s" % (rootId,childId,kwargs)
Please see the *FormEncode* <http://www.formencode.org/en/latest/Validator.html> documentation
for list of available validators:
* Common <http://www.formencode.org/en/latest/modules/validators.html#module-formencode.validators>
* National <http://www.formencode.org/en/latest/modules/national.html#module-formencode.national>
Multiple REST services under a common root URL
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
A typical case in REST is where you have parent/child resources (business entities), e.g.
::
Customer
Customer Address
Customer Phone
Customer Order
Customer Invoice
Customer Invoice Payment
etc.
This can create a URL structure like:
::
/customer
/customer/<customerId>
/customer/<customerId>/address
/customer/<customerId>/address/<addressId>
/customer/<customerId>/phone
/customer/<customerId>/phone/<phoneId>
/customer/<customerId>/invoice
/customer/<customerId>/invoice/<invoiceId>
/customer/<customerId>/invoice/<invoiceId>/payment
/customer/<customerId>/invoice/<invoiceId>/payment/<paymentId>
CorePost allows you to write small, modular classes that implement a REST service for just a single entity,
driven by URL paths with dynamic elements in them (e.g. the *customerId*, *invoiceId*, *paymentId* path parameters in the sample above).
You do not have to mesh all these different entities in a single class.
At the end, you wrap all of the different REST services in a single *RESTResource* object (which extends the regular Twisted Web Resource object)
and it takes care of routing the request to the appropriate class.
Here is a full-blown example of two REST services for Customer and Customer Address::
from corepost import Response, NotFoundException, AlreadyExistsException
from corepost.web import RESTResource, route, Http
class CustomerRESTService():
path = "/customer"
@route("/")
def getAll(self,request):
return DB.getAllCustomers()
@route("/<customerId>")
def get(self,request,customerId):
return DB.getCustomer(customerId)
@route("/",Http.POST)
def post(self,request,customerId,firstName,lastName):
customer = Customer(customerId, firstName, lastName)
DB.saveCustomer(customer)
return Response(201)
@route("/<customerId>",Http.PUT)
def put(self,request,customerId,firstName,lastName):
c = DB.getCustomer(customerId)
(c.firstName,c.lastName) = (firstName,lastName)
return Response(200)
@route("/<customerId>",Http.DELETE)
def delete(self,request,customerId):
DB.deleteCustomer(customerId)
return Response(200)
@route("/",Http.DELETE)
def deleteAll(self,request):
DB.deleteAllCustomers()
return Response(200)
class CustomerAddressRESTService():
path = "/customer/<customerId>/address"
@route("/")
def getAll(self,request,customerId):
return DB.getCustomer(customerId).addresses
@route("/<addressId>")
def get(self,request,customerId,addressId):
return DB.getCustomerAddress(customerId, addressId)
@route("/",Http.POST)
def post(self,request,customerId,addressId,streetNumber,streetName,stateCode,countryCode):
c = DB.getCustomer(customerId)
address = CustomerAddress(streetNumber,streetName,stateCode,countryCode)
c.addresses[addressId] = address
return Response(201)
@route("/<addressId>",Http.PUT)
def put(self,request,customerId,addressId,streetNumber,streetName,stateCode,countryCode):
address = DB.getCustomerAddress(customerId, addressId)
(address.streetNumber,address.streetName,address.stateCode,address.countryCode) = (streetNumber,streetName,stateCode,countryCode)
return Response(200)
@route("/<addressId>",Http.DELETE)
def delete(self,request,customerId,addressId):
DB.getCustomerAddress(customerId, addressId) #validate address exists
del(DB.getCustomer(customerId).addresses[addressId])
return Response(200)
@route("/",Http.DELETE)
def deleteAll(self,request,customerId):
c = DB.getCustomer(customerId)
c.addresses = {}
return Response(200)
def run_rest_app():
app = RESTResource((CustomerRESTService(),CustomerAddressRESTService()))
app.run(8080)
if __name__ == "__main__":
run_rest_app()
Content types
-------------
CorePost integrates support for JSON, YAML and XML (partially) based on request content types.
*Parsing of incoming content*
Based on the incoming content type in POST/PUT requests,
the body will be automatically parsed to JSON, YAML and XML (ElementTree)
* request.json
* request.yaml
* request.xml
and attached to the request::
@route("/post/json",(Http.POST,Http.PUT))
def test_json(self,request,**kwargs):
return "%s" % json.dumps(request.json)
@route("/post/xml",(Http.POST,Http.PUT))
def test_xml(self,request,**kwargs):
return "%s" % ElementTree.tostring(request.xml)
@route("/post/yaml",(Http.POST,Http.PUT))
def test_yaml(self,request,**kwargs):
return "%s" % yaml.dump(request.yaml)
Routing requests by incoming content type
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Based on the incoming content type in POST/PUT requests, the *same* URL can be hooked up to different router methods::
@route("/post/by/content",(Http.POST,Http.PUT),MediaType.APPLICATION_JSON)
def test_content_app_json(self,request,**kwargs):
return request.received_headers[HttpHeader.CONTENT_TYPE]
@route("/post/by/content",(Http.POST,Http.PUT),(MediaType.TEXT_XML,MediaType.APPLICATION_XML))
def test_content_xml(self,request,**kwargs):
return request.received_headers[HttpHeader.CONTENT_TYPE]
@route("/post/by/content",(Http.POST,Http.PUT),MediaType.TEXT_YAML)
def test_content_yaml(self,request,**kwargs):
return request.received_headers[HttpHeader.CONTENT_TYPE]
@route("/post/by/content",(Http.POST,Http.PUT))
def test_content_catch_all(self,request,**kwargs):
return MediaType.WILDCARD
Converting Python objects to content type based on what caller can accept
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Instead of returning string responses, the code can just return Python objects.
Depending whether the caller can accept JSON (default) or YAML, the Python objects will be automatically converted::
@route("/return/by/accept")
def test_return_content_by_accepts(self,request,**kwargs):
val = [{"test1":"Test1"},{"test2":"Test2"}]
return val
Calling this URL with "Accept: application/json" will return:
::
[{"test1": "Test1"}, {"test2": "Test2"}]
Calling it with "Accept: text/yaml" will return:
::
- {test1: Test1}
- {test2: Test2}
Filters
-----------------
There is support for CorePost resource filters via the two following *corepost.filter* interfaces::
class IRequestFilter(Interface):
"""Request filter interface"""
def filterRequest(self,request):
"""Allows to intercept and change an incoming request"""
pass
class IResponseFilter(Interface):
"""Response filter interface"""
def filterResponse(self,request,response):
"""Allows to intercept and change an outgoing response"""
pass
A filter class can implement either of them or both (for a wrap around filter), e.g.::
class AddCustomHeaderFilter():
"""Implements a request filter that adds a custom header to the incoming request"""
zope.interface.implements(IRequestFilter)
def filterRequest(self,request):
request.received_headers["Custom-Header"] = "Custom Header Value"
class Change404to503Filter():
"""Implements just a response filter that changes 404 to 503 statuses"""
zope.interface.implements(IResponseFilter)
def filterResponse(self,request,response):
if response.code == 404:
response.code = 503
class WrapAroundFilter():
"""Implements both types of filters in one class"""
zope.interface.implements(IRequestFilter,IResponseFilter)
def filterRequest(self,request):
request.received_headers["X-Wrap-Input"] = "Input"
def filterResponse(self,request,response):
response.headers["X-Wrap-Output"] = "Output"
In order to activate the filters on a RESTResource instance, you need to pass a list of them in the constructor as the *filters* parameter, e.g.::
class FilterApp():
@route("/",Http.GET)
def root(self,request,**kwargs):
return request.received_headers
def run_filter_app():
app = RESTResource(services=((FilterApp(),),filters=(Change404to503Filter(),AddCustomHeaderFilter(),WrapAroundFilter(),))
app.run(8083)
Asynchronous Operations
-----------------------
@defer.inlineCallbacks support
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
If you want a deferred async method, just use *defer.returnValue()*::
@route("/",Http.GET)
@defer.inlineCallbacks
def root(self,request,**kwargs):
val1 = yield db.query("SELECT ....")
val2 = yield db.query("SELECT ....")
defer.returnValue(val1 + val2)
This is standard Twisted functionality.
HTTP codes
------------------
By default, CorePost returns the appropriate HTTP code based on the HTTP method:
Success:
* 200 (OK) - GET, DELETE, PUT
* 201 (Created) - POST
Errors:
* 404 - not able to match any URL
* 400 - missing mandatory argument (driven from the arguments on the actual functions)
* 400 - argument failed validation
* 500 - server error
Filters
=======
There is support for CorePost resource filters via the two following *corepost.filter* interfaces::
class IRequestFilter(Interface):
"""Request filter interface"""
def filterRequest(self,request):
"""Allows to intercept and change an incoming request"""
pass
class IResponseFilter(Interface):
"""Response filter interface"""
def filterResponse(self,request,response):
"""Allows to intercept and change an outgoing response"""
pass
A filter class can implement either of them or both (for a wrap around filter), e.g.::
class AddCustomHeaderFilter():
"""Implements a request filter that adds a custom header to the incoming request"""
zope.interface.implements(IRequestFilter)
def filterRequest(self,request):
request.received_headers["Custom-Header"] = "Custom Header Value"
class Change404to503Filter():
"""Implements just a response filter that changes 404 to 503 statuses"""
zope.interface.implements(IResponseFilter)
def filterResponse(self,request,response):
if response.code == 404:
response.code = 503
class WrapAroundFilter():
"""Implements both types of filters in one class"""
zope.interface.implements(IRequestFilter,IResponseFilter)
def filterRequest(self,request):
request.received_headers["X-Wrap-Input"] = "Input"
def filterResponse(self,request,response):
response.headers["X-Wrap-Output"] = "Output"
In order to activate the filters on a RESTResource instance, you need to pass a list of them in the constructor as the *filters* parameter, e.g.::
class FilterApp:
@route("/",Http.GET)
def root(self,request,**kwargs):
return request.received_headers
def run_filter_app():
app = RESTResource(services=(FilterApp(),),filters=(Change404to503Filter(),AddCustomHeaderFilter(),WrapAroundFilter(),))
app.run(8083)
HTTP codes
==========
By default, CorePost returns the appropriate HTTP code based on the HTTP method:
Success:
* 200 (OK) - GET, DELETE, PUT
* 201 (Created) - POST
Errors:
* 404 - not able to match any URL.
* 400 - missing mandatory argument (driven from the arguments on the actual functions)
* 400 - argument failed validation
* 500 - server error
CorePost
====================================
A Twisted REST micro-framework
------------------------------
.. toctree::
:maxdepth: 4
intro
Features
--------
.. toctree::
:maxdepth: 4
url_routing
arguments
content_types
filters
http_codes
async
modules
Introduction
============
What is CorePost?
-----------------
CorePost is a Python REST micro-framework. It is meant for building enterprise-grade REST server applications that provide
API services to other applications and/or a UI layer (coded in any framework or language).
More importantly, CorePost is an asynchronous I/O web framework (similar to Node.js).
Hence it relies on asynchronous I/O operations, which are extremely efficient, but somewhat more complicated to code.
Fortunately, CorePost does not create it's own async I/O library, but instead uses under the mature, well documented
and extremely well designed Twisted library, in particular its web layer (known simply as twisted.web)
Coupled with a JIT runtime like PyPy, this should give you the ability to develop REST server side applications
that will be extremely performant in production, yet (hopefully) fun and productive to develop.
What is Twisted?
----------------
Twisted is a very mature Python async I/O network toolkit:
http://twistedmatrix.com/trac/
Understanding core principles behind Twisted and its APIs is required (at least at a basic level) before coding any CorePost application.
Hence we recommend either reading the very thorough developer's guide:
http://twistedmatrix.com/documents/current/core/howto/book.pdf
or the excellent Twisted tutorials from Dave Peticolas:
http://krondo.com/blog/?page_id=1327
In particular, understanding the core Twisted Deferred object (and its productive inline callback approach) are crucial
to productive usage of Twisted APIs for writing asynchronous web applications.
What does CorePost add on top of Twisted Web?
---------------------------------------------
Mostly productivity features that take of low-level plumbing such as:
* routing request to handler methods
* automatic parsing of JSON/YAML/XML input
* automatic conversion of Python objects and classes to JSON / YAML / XML formats
* simplified exception handling
* custom request / response filters
However, this is a very thin layer. Once you get to write some serious code that interacts with an external system (e.g. a SQL database)
you are writing a hard-code Twisted web application. CorePost is just there to make it easier for you and let you focus on business logic,
while letting it take care of common required plumbing. That's it.
A CorePost application is nothing more than a *twisted.web* application under the hood.
Why would I use CorePost instead of Node.js?
--------------------------------------------
As you develop more Twisted code, you will realize how its elegant and powerful *Deferred* object
(and especially inline callbacks) make developing *readable* asynchronous code much more pleasant than any other solution.
\ No newline at end of file
Modular REST applications
=========================
A typical case in REST is where you have parent/child resources (business entities), e.g.
::
Customer
Customer Address
Customer Phone
Customer Order
Customer Invoice
Customer Invoice Payment
etc.
This can create a URL structure like:
::
/customer
/customer/<customerId>
/customer/<customerId>/address
/customer/<customerId>/address/<addressId>
/customer/<customerId>/phone
/customer/<customerId>/phone/<phoneId>
/customer/<customerId>/invoice
/customer/<customerId>/invoice/<invoiceId>
/customer/<customerId>/invoice/<invoiceId>/payment
/customer/<customerId>/invoice/<invoiceId>/payment/<paymentId>
CorePost allows you to write small, modular classes that implement a REST service for just a single entity,
driven by URL paths with dynamic elements in them (e.g. the *customerId*, *invoiceId*, *paymentId* path parameters in the sample above).
You do not have to mesh all these different entities in a single class.
At the end, you wrap all of the different REST services in a single *RESTResource* object (which extends the regular Twisted Web Resource object)
and it takes care of routing the request to the appropriate class.
Here is a full-blown example of two REST services for Customer and Customer Address::
from corepost import Response, NotFoundException, AlreadyExistsException
from corepost.web import RESTResource, route, Http
class CustomerRESTService():
path = "/customer"
@route("/")
def getAll(self,request):
return DB.getAllCustomers()
@route("/<customerId>")
def get(self,request,customerId):
return DB.getCustomer(customerId)
@route("/",Http.POST)
def post(self,request,customerId,firstName,lastName):
customer = Customer(customerId, firstName, lastName)
DB.saveCustomer(customer)
return Response(201)
@route("/<customerId>",Http.PUT)
def put(self,request,customerId,firstName,lastName):
c = DB.getCustomer(customerId)
(c.firstName,c.lastName) = (firstName,lastName)
return Response(200)
@route("/<customerId>",Http.DELETE)
def delete(self,request,customerId):
DB.deleteCustomer(customerId)
return Response(200)
@route("/",Http.DELETE)
def deleteAll(self,request):
DB.deleteAllCustomers()
return Response(200)
class CustomerAddressRESTService():
path = "/customer/<customerId>/address"
@route("/")
def getAll(self,request,customerId):
return DB.getCustomer(customerId).addresses
@route("/<addressId>")
def get(self,request,customerId,addressId):
return DB.getCustomerAddress(customerId, addressId)
@route("/",Http.POST)
def post(self,request,customerId,addressId,streetNumber,streetName,stateCode,countryCode):
c = DB.getCustomer(customerId)
address = CustomerAddress(streetNumber,streetName,stateCode,countryCode)
c.addresses[addressId] = address
return Response(201)
@route("/<addressId>",Http.PUT)
def put(self,request,customerId,addressId,streetNumber,streetName,stateCode,countryCode):
address = DB.getCustomerAddress(customerId, addressId)
(address.streetNumber,address.streetName,address.stateCode,address.countryCode) = (streetNumber,streetName,stateCode,countryCode)
return Response(200)
@route("/<addressId>",Http.DELETE)
def delete(self,request,customerId,addressId):
DB.getCustomerAddress(customerId, addressId) #validate address exists
del(DB.getCustomer(customerId).addresses[addressId])
return Response(200)
@route("/",Http.DELETE)
def deleteAll(self,request,customerId):
c = DB.getCustomer(customerId)
c.addresses = {}
return Response(200)
def run_rest_app():
app = RESTResource((CustomerRESTService(),CustomerAddressRESTService()))
app.run(8080)
if __name__ == "__main__":
run_rest_app()
URL Routing
=================
@route decorator
----------------
Via a simple *@route* decorator you can automatically route *twisted.web* Request objects to your class method
based on URL (with dynamic paths), HTTP method, expected content type, etc::
from corepost.web import route, RESTResource
from corepost.enums import Http
class RESTService():
@route("/",Http.GET)
def root(self,request,**kwargs):
return request.path
@route("/test",Http.GET)
def test(self,request,**kwargs):
return request.path
@route("/test/<int:numericid>",Http.GET)
def test_get_resources(self,request,numericid,**kwargs):
return "%s" % numericid
if __name__ == '__main__':
app = RESTResource((RESTService,))
app.run()
*Note*:
This piece of code::
app.run()
is just for convenience when showing code samples and writing unit tests.
In a real production application you would use existing Twisted *twistd* functionality:
* http://twistedmatrix.com/documents/current/core/howto/basics.html
* http://twistedmatrix.com/documents/current/core/howto/application.html
* http://twistedmatrix.com/documents/current/core/howto/tap.html
Path argument extraction
----------------
CorePort can easily extract path arguments from an URL and convert them to the desired type.
The supported types are:
* *int*
* *float*
* *string*
Example::
@route("/int/<int:intarg>/float/<float:floatarg>/string/<stringarg>",Http.GET)
def test(self,request,intarg,floatarg,stringarg,**kwargs):
pass
Routing requests by incoming content type
-----------------------------------------
Based on the incoming content type in POST/PUT requests, the *same* URL can be hooked up to different router methods::
@route("/post/by/content",(Http.POST,Http.PUT),MediaType.APPLICATION_JSON)
def test_content_app_json(self,request,**kwargs):
return request.received_headers[HttpHeader.CONTENT_TYPE]
@route("/post/by/content",(Http.POST,Http.PUT),(MediaType.TEXT_XML,MediaType.APPLICATION_XML))
def test_content_xml(self,request,**kwargs):
return request.received_headers[HttpHeader.CONTENT_TYPE]
@route("/post/by/content",(Http.POST,Http.PUT),MediaType.TEXT_YAML)
def test_content_yaml(self,request,**kwargs):
return request.received_headers[HttpHeader.CONTENT_TYPE]
@route("/post/by/content",(Http.POST,Http.PUT))
def test_content_catch_all(self,request,**kwargs):
return MediaType.WILDCARD
/*
* basic.css
* ~~~~~~~~~
*
* Sphinx stylesheet -- basic theme.
*
* :copyright: Copyright 2007-2011 by the Sphinx team, see AUTHORS.
* :license: BSD, see LICENSE for details.
*
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border-right: none;
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tt {
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padding: 0 1px 0 1px;
font-size: 0.95em;
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th {
background-color: #ede;
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background: #d6d6d6;
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/*
* doctools.js
* ~~~~~~~~~~~
*
* Sphinx JavaScript utilities for all documentation.
*
* :copyright: Copyright 2007-2011 by the Sphinx team, see AUTHORS.
* :license: BSD, see LICENSE for details.
*
*/
/**
* select a different prefix for underscore
*/
$u = _.noConflict();
/**
* make the code below compatible with browsers without
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if (!window.console || !console.firebug) {
var names = ["log", "debug", "info", "warn", "error", "assert", "dir",
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window.console = {};
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*/
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/**
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var Documentation = {
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this.initIndexTable();
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PLURAL_EXPR : function(n) { return n == 1 ? 0 : 1; },
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attr('href', '#' + this.id).
attr('title', _('Permalink to this headline')).
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initIndexTable : function() {
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hideSearchWords : function() {
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/**
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makeURL : function(relativeURL) {
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parts.pop();
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var url = parts.join('/');
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};
// quick alias for translations
_ = Documentation.gettext;
$(document).ready(function() {
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});
/*!
* jQuery JavaScript Library v1.4.2
* http://jquery.com/
*
* Copyright 2010, John Resig
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* Includes Sizzle.js
* http://sizzlejs.com/
* Copyright 2010, The Dojo Foundation
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*
* Date: Sat Feb 13 22:33:48 2010 -0500
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\ No newline at end of file
/*
* searchtools.js_t
* ~~~~~~~~~~~~~~~~
*
* Sphinx JavaScript utilties for the full-text search.
*
* :copyright: Copyright 2007-2011 by the Sphinx team, see AUTHORS.
* :license: BSD, see LICENSE for details.
*
*/
/**
* helper function to return a node containing the
* search summary for a given text. keywords is a list
* of stemmed words, hlwords is the list of normal, unstemmed
* words. the first one is used to find the occurance, the
* latter for highlighting it.
*/
jQuery.makeSearchSummary = function(text, keywords, hlwords) {
var textLower = text.toLowerCase();
var start = 0;
$.each(keywords, function() {
var i = textLower.indexOf(this.toLowerCase());
if (i > -1)
start = i;
});
start = Math.max(start - 120, 0);
var excerpt = ((start > 0) ? '...' : '') +
$.trim(text.substr(start, 240)) +
((start + 240 - text.length) ? '...' : '');
var rv = $('<div class="context"></div>').text(excerpt);
$.each(hlwords, function() {
rv = rv.highlightText(this, 'highlighted');
});
return rv;
}
/**
* Porter Stemmer
*/
var Stemmer = function() {
var step2list = {
ational: 'ate',
tional: 'tion',
enci: 'ence',
anci: 'ance',
izer: 'ize',
bli: 'ble',
alli: 'al',
entli: 'ent',
eli: 'e',
ousli: 'ous',
ization: 'ize',
ation: 'ate',
ator: 'ate',
alism: 'al',
iveness: 'ive',
fulness: 'ful',
ousness: 'ous',
aliti: 'al',
iviti: 'ive',
biliti: 'ble',
logi: 'log'
};
var step3list = {
icate: 'ic',
ative: '',
alize: 'al',
iciti: 'ic',
ical: 'ic',
ful: '',
ness: ''
};
var c = "[^aeiou]"; // consonant
var v = "[aeiouy]"; // vowel
var C = c + "[^aeiouy]*"; // consonant sequence
var V = v + "[aeiou]*"; // vowel sequence
var mgr0 = "^(" + C + ")?" + V + C; // [C]VC... is m>0
var meq1 = "^(" + C + ")?" + V + C + "(" + V + ")?$"; // [C]VC[V] is m=1
var mgr1 = "^(" + C + ")?" + V + C + V + C; // [C]VCVC... is m>1
var s_v = "^(" + C + ")?" + v; // vowel in stem
this.stemWord = function (w) {
var stem;
var suffix;
var firstch;
var origword = w;
if (w.length < 3)
return w;
var re;
var re2;
var re3;
var re4;
firstch = w.substr(0,1);
if (firstch == "y")
w = firstch.toUpperCase() + w.substr(1);
// Step 1a
re = /^(.+?)(ss|i)es$/;
re2 = /^(.+?)([^s])s$/;
if (re.test(w))
w = w.replace(re,"$1$2");
else if (re2.test(w))
w = w.replace(re2,"$1$2");
// Step 1b
re = /^(.+?)eed$/;
re2 = /^(.+?)(ed|ing)$/;
if (re.test(w)) {
var fp = re.exec(w);
re = new RegExp(mgr0);
if (re.test(fp[1])) {
re = /.$/;
w = w.replace(re,"");
}
}
else if (re2.test(w)) {
var fp = re2.exec(w);
stem = fp[1];
re2 = new RegExp(s_v);
if (re2.test(stem)) {
w = stem;
re2 = /(at|bl|iz)$/;
re3 = new RegExp("([^aeiouylsz])\\1$");
re4 = new RegExp("^" + C + v + "[^aeiouwxy]$");
if (re2.test(w))
w = w + "e";
else if (re3.test(w)) {
re = /.$/;
w = w.replace(re,"");
}
else if (re4.test(w))
w = w + "e";
}
}
// Step 1c
re = /^(.+?)y$/;
if (re.test(w)) {
var fp = re.exec(w);
stem = fp[1];
re = new RegExp(s_v);
if (re.test(stem))
w = stem + "i";
}
// Step 2
re = /^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/;
if (re.test(w)) {
var fp = re.exec(w);
stem = fp[1];
suffix = fp[2];
re = new RegExp(mgr0);
if (re.test(stem))
w = stem + step2list[suffix];
}
// Step 3
re = /^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/;
if (re.test(w)) {
var fp = re.exec(w);
stem = fp[1];
suffix = fp[2];
re = new RegExp(mgr0);
if (re.test(stem))
w = stem + step3list[suffix];
}
// Step 4
re = /^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/;
re2 = /^(.+?)(s|t)(ion)$/;
if (re.test(w)) {
var fp = re.exec(w);
stem = fp[1];
re = new RegExp(mgr1);
if (re.test(stem))
w = stem;
}
else if (re2.test(w)) {
var fp = re2.exec(w);
stem = fp[1] + fp[2];
re2 = new RegExp(mgr1);
if (re2.test(stem))
w = stem;
}
// Step 5
re = /^(.+?)e$/;
if (re.test(w)) {
var fp = re.exec(w);
stem = fp[1];
re = new RegExp(mgr1);
re2 = new RegExp(meq1);
re3 = new RegExp("^" + C + v + "[^aeiouwxy]$");
if (re.test(stem) || (re2.test(stem) && !(re3.test(stem))))
w = stem;
}
re = /ll$/;
re2 = new RegExp(mgr1);
if (re.test(w) && re2.test(w)) {
re = /.$/;
w = w.replace(re,"");
}
// and turn initial Y back to y
if (firstch == "y")
w = firstch.toLowerCase() + w.substr(1);
return w;
}
}
/**
* Search Module
*/
var Search = {
_index : null,
_queued_query : null,
_pulse_status : -1,
init : function() {
var params = $.getQueryParameters();
if (params.q) {
var query = params.q[0];
$('input[name="q"]')[0].value = query;
this.performSearch(query);
}
},
loadIndex : function(url) {
$.ajax({type: "GET", url: url, data: null, success: null,
dataType: "script", cache: true});
},
setIndex : function(index) {
var q;
this._index = index;
if ((q = this._queued_query) !== null) {
this._queued_query = null;
Search.query(q);
}
},
hasIndex : function() {
return this._index !== null;
},
deferQuery : function(query) {
this._queued_query = query;
},
stopPulse : function() {
this._pulse_status = 0;
},
startPulse : function() {
if (this._pulse_status >= 0)
return;
function pulse() {
Search._pulse_status = (Search._pulse_status + 1) % 4;
var dotString = '';
for (var i = 0; i < Search._pulse_status; i++)
dotString += '.';
Search.dots.text(dotString);
if (Search._pulse_status > -1)
window.setTimeout(pulse, 500);
};
pulse();
},
/**
* perform a search for something
*/
performSearch : function(query) {
// create the required interface elements
this.out = $('#search-results');
this.title = $('<h2>' + _('Searching') + '</h2>').appendTo(this.out);
this.dots = $('<span></span>').appendTo(this.title);
this.status = $('<p style="display: none"></p>').appendTo(this.out);
this.output = $('<ul class="search"/>').appendTo(this.out);
$('#search-progress').text(_('Preparing search...'));
this.startPulse();
// index already loaded, the browser was quick!
if (this.hasIndex())
this.query(query);
else
this.deferQuery(query);
},
query : function(query) {
var stopwords = ["and","then","into","it","as","are","in","if","for","no","there","their","was","is","be","to","that","but","they","not","such","with","by","a","on","these","of","will","this","near","the","or","at"];
// Stem the searchterms and add them to the correct list
var stemmer = new Stemmer();
var searchterms = [];
var excluded = [];
var hlterms = [];
var tmp = query.split(/\s+/);
var objectterms = [];
for (var i = 0; i < tmp.length; i++) {
if (tmp[i] != "") {
objectterms.push(tmp[i].toLowerCase());
}
if ($u.indexOf(stopwords, tmp[i]) != -1 || tmp[i].match(/^\d+$/) ||
tmp[i] == "") {
// skip this "word"
continue;
}
// stem the word
var word = stemmer.stemWord(tmp[i]).toLowerCase();
// select the correct list
if (word[0] == '-') {
var toAppend = excluded;
word = word.substr(1);
}
else {
var toAppend = searchterms;
hlterms.push(tmp[i].toLowerCase());
}
// only add if not already in the list
if (!$.contains(toAppend, word))
toAppend.push(word);
};
var highlightstring = '?highlight=' + $.urlencode(hlterms.join(" "));
// console.debug('SEARCH: searching for:');
// console.info('required: ', searchterms);
// console.info('excluded: ', excluded);
// prepare search
var filenames = this._index.filenames;
var titles = this._index.titles;
var terms = this._index.terms;
var fileMap = {};
var files = null;
// different result priorities
var importantResults = [];
var objectResults = [];
var regularResults = [];
var unimportantResults = [];
$('#search-progress').empty();
// lookup as object
for (var i = 0; i < objectterms.length; i++) {
var others = [].concat(objectterms.slice(0,i),
objectterms.slice(i+1, objectterms.length))
var results = this.performObjectSearch(objectterms[i], others);
// Assume first word is most likely to be the object,
// other words more likely to be in description.
// Therefore put matches for earlier words first.
// (Results are eventually used in reverse order).
objectResults = results[0].concat(objectResults);
importantResults = results[1].concat(importantResults);
unimportantResults = results[2].concat(unimportantResults);
}
// perform the search on the required terms
for (var i = 0; i < searchterms.length; i++) {
var word = searchterms[i];
// no match but word was a required one
if ((files = terms[word]) == null)
break;
if (files.length == undefined) {
files = [files];
}
// create the mapping
for (var j = 0; j < files.length; j++) {
var file = files[j];
if (file in fileMap)
fileMap[file].push(word);
else
fileMap[file] = [word];
}
}
// now check if the files don't contain excluded terms
for (var file in fileMap) {
var valid = true;
// check if all requirements are matched
if (fileMap[file].length != searchterms.length)
continue;
// ensure that none of the excluded terms is in the
// search result.
for (var i = 0; i < excluded.length; i++) {
if (terms[excluded[i]] == file ||
$.contains(terms[excluded[i]] || [], file)) {
valid = false;
break;
}
}
// if we have still a valid result we can add it
// to the result list
if (valid)
regularResults.push([filenames[file], titles[file], '', null]);
}
// delete unused variables in order to not waste
// memory until list is retrieved completely
delete filenames, titles, terms;
// now sort the regular results descending by title
regularResults.sort(function(a, b) {
var left = a[1].toLowerCase();
var right = b[1].toLowerCase();
return (left > right) ? -1 : ((left < right) ? 1 : 0);
});
// combine all results
var results = unimportantResults.concat(regularResults)
.concat(objectResults).concat(importantResults);
// print the results
var resultCount = results.length;
function displayNextItem() {
// results left, load the summary and display it
if (results.length) {
var item = results.pop();
var listItem = $('<li style="display:none"></li>');
if (DOCUMENTATION_OPTIONS.FILE_SUFFIX == '') {
// dirhtml builder
var dirname = item[0] + '/';
if (dirname.match(/\/index\/$/)) {
dirname = dirname.substring(0, dirname.length-6);
} else if (dirname == 'index/') {
dirname = '';
}
listItem.append($('<a/>').attr('href',
DOCUMENTATION_OPTIONS.URL_ROOT + dirname +
highlightstring + item[2]).html(item[1]));
} else {
// normal html builders
listItem.append($('<a/>').attr('href',
item[0] + DOCUMENTATION_OPTIONS.FILE_SUFFIX +
highlightstring + item[2]).html(item[1]));
}
if (item[3]) {
listItem.append($('<span> (' + item[3] + ')</span>'));
Search.output.append(listItem);
listItem.slideDown(5, function() {
displayNextItem();
});
} else if (DOCUMENTATION_OPTIONS.HAS_SOURCE) {
$.get(DOCUMENTATION_OPTIONS.URL_ROOT + '_sources/' +
item[0] + '.txt', function(data) {
if (data != '') {
listItem.append($.makeSearchSummary(data, searchterms, hlterms));
Search.output.append(listItem);
}
listItem.slideDown(5, function() {
displayNextItem();
});
}, "text");
} else {
// no source available, just display title
Search.output.append(listItem);
listItem.slideDown(5, function() {
displayNextItem();
});
}
}
// search finished, update title and status message
else {
Search.stopPulse();
Search.title.text(_('Search Results'));
if (!resultCount)
Search.status.text(_('Your search did not match any documents. Please make sure that all words are spelled correctly and that you\'ve selected enough categories.'));
else
Search.status.text(_('Search finished, found %s page(s) matching the search query.').replace('%s', resultCount));
Search.status.fadeIn(500);
}
}
displayNextItem();
},
performObjectSearch : function(object, otherterms) {
var filenames = this._index.filenames;
var objects = this._index.objects;
var objnames = this._index.objnames;
var titles = this._index.titles;
var importantResults = [];
var objectResults = [];
var unimportantResults = [];
for (var prefix in objects) {
for (var name in objects[prefix]) {
var fullname = (prefix ? prefix + '.' : '') + name;
if (fullname.toLowerCase().indexOf(object) > -1) {
var match = objects[prefix][name];
var objname = objnames[match[1]][2];
var title = titles[match[0]];
// If more than one term searched for, we require other words to be
// found in the name/title/description
if (otherterms.length > 0) {
var haystack = (prefix + ' ' + name + ' ' +
objname + ' ' + title).toLowerCase();
var allfound = true;
for (var i = 0; i < otherterms.length; i++) {
if (haystack.indexOf(otherterms[i]) == -1) {
allfound = false;
break;
}
}
if (!allfound) {
continue;
}
}
var descr = objname + _(', in ') + title;
anchor = match[3];
if (anchor == '')
anchor = fullname;
else if (anchor == '-')
anchor = objnames[match[1]][1] + '-' + fullname;
result = [filenames[match[0]], fullname, '#'+anchor, descr];
switch (match[2]) {
case 1: objectResults.push(result); break;
case 0: importantResults.push(result); break;
case 2: unimportantResults.push(result); break;
}
}
}
}
// sort results descending
objectResults.sort(function(a, b) {
return (a[1] > b[1]) ? -1 : ((a[1] < b[1]) ? 1 : 0);
});
importantResults.sort(function(a, b) {
return (a[1] > b[1]) ? -1 : ((a[1] < b[1]) ? 1 : 0);
});
unimportantResults.sort(function(a, b) {
return (a[1] > b[1]) ? -1 : ((a[1] < b[1]) ? 1 : 0);
});
return [importantResults, objectResults, unimportantResults]
}
}
$(document).ready(function() {
Search.init();
});
\ No newline at end of file
/*
* sidebar.js
* ~~~~~~~~~~
*
* This script makes the Sphinx sidebar collapsible.
*
* .sphinxsidebar contains .sphinxsidebarwrapper. This script adds
* in .sphixsidebar, after .sphinxsidebarwrapper, the #sidebarbutton
* used to collapse and expand the sidebar.
*
* When the sidebar is collapsed the .sphinxsidebarwrapper is hidden
* and the width of the sidebar and the margin-left of the document
* are decreased. When the sidebar is expanded the opposite happens.
* This script saves a per-browser/per-session cookie used to
* remember the position of the sidebar among the pages.
* Once the browser is closed the cookie is deleted and the position
* reset to the default (expanded).
*
* :copyright: Copyright 2007-2011 by the Sphinx team, see AUTHORS.
* :license: BSD, see LICENSE for details.
*
*/
$(function() {
// global elements used by the functions.
// the 'sidebarbutton' element is defined as global after its
// creation, in the add_sidebar_button function
var bodywrapper = $('.bodywrapper');
var sidebar = $('.sphinxsidebar');
var sidebarwrapper = $('.sphinxsidebarwrapper');
// for some reason, the document has no sidebar; do not run into errors
if (!sidebar.length) return;
// original margin-left of the bodywrapper and width of the sidebar
// with the sidebar expanded
var bw_margin_expanded = bodywrapper.css('margin-left');
var ssb_width_expanded = sidebar.width();
// margin-left of the bodywrapper and width of the sidebar
// with the sidebar collapsed
var bw_margin_collapsed = '.8em';
var ssb_width_collapsed = '.8em';
// colors used by the current theme
var dark_color = $('.related').css('background-color');
var light_color = $('.document').css('background-color');
function sidebar_is_collapsed() {
return sidebarwrapper.is(':not(:visible)');
}
function toggle_sidebar() {
if (sidebar_is_collapsed())
expand_sidebar();
else
collapse_sidebar();
}
function collapse_sidebar() {
sidebarwrapper.hide();
sidebar.css('width', ssb_width_collapsed);
bodywrapper.css('margin-left', bw_margin_collapsed);
sidebarbutton.css({
'margin-left': '0',
'height': bodywrapper.height()
});
sidebarbutton.find('span').text('»');
sidebarbutton.attr('title', _('Expand sidebar'));
document.cookie = 'sidebar=collapsed';
}
function expand_sidebar() {
bodywrapper.css('margin-left', bw_margin_expanded);
sidebar.css('width', ssb_width_expanded);
sidebarwrapper.show();
sidebarbutton.css({
'margin-left': ssb_width_expanded-12,
'height': bodywrapper.height()
});
sidebarbutton.find('span').text('«');
sidebarbutton.attr('title', _('Collapse sidebar'));
document.cookie = 'sidebar=expanded';
}
function add_sidebar_button() {
sidebarwrapper.css({
'float': 'left',
'margin-right': '0',
'width': ssb_width_expanded - 28
});
// create the button
sidebar.append(
'<div id="sidebarbutton"><span>&laquo;</span></div>'
);
var sidebarbutton = $('#sidebarbutton');
light_color = sidebarbutton.css('background-color');
// find the height of the viewport to center the '<<' in the page
var viewport_height;
if (window.innerHeight)
viewport_height = window.innerHeight;
else
viewport_height = $(window).height();
sidebarbutton.find('span').css({
'display': 'block',
'margin-top': (viewport_height - sidebar.position().top - 20) / 2
});
sidebarbutton.click(toggle_sidebar);
sidebarbutton.attr('title', _('Collapse sidebar'));
sidebarbutton.css({
'color': '#FFFFFF',
'border-left': '1px solid ' + dark_color,
'font-size': '1.2em',
'cursor': 'pointer',
'height': bodywrapper.height(),
'padding-top': '1px',
'margin-left': ssb_width_expanded - 12
});
sidebarbutton.hover(
function () {
$(this).css('background-color', dark_color);
},
function () {
$(this).css('background-color', light_color);
}
);
}
function set_position_from_cookie() {
if (!document.cookie)
return;
var items = document.cookie.split(';');
for(var k=0; k<items.length; k++) {
var key_val = items[k].split('=');
var key = key_val[0];
if (key == 'sidebar') {
var value = key_val[1];
if ((value == 'collapsed') && (!sidebar_is_collapsed()))
collapse_sidebar();
else if ((value == 'expanded') && (sidebar_is_collapsed()))
expand_sidebar();
}
}
}
add_sidebar_button();
var sidebarbutton = $('#sidebarbutton');
set_position_from_cookie();
});
// Underscore.js 0.5.5
// (c) 2009 Jeremy Ashkenas, DocumentCloud Inc.
// Underscore is freely distributable under the terms of the MIT license.
// Portions of Underscore are inspired by or borrowed from Prototype.js,
// Oliver Steele's Functional, and John Resig's Micro-Templating.
// For all details and documentation:
// http://documentcloud.github.com/underscore/
(function(){var j=this,n=j._,i=function(a){this._wrapped=a},m=typeof StopIteration!=="undefined"?StopIteration:"__break__",b=j._=function(a){return new i(a)};if(typeof exports!=="undefined")exports._=b;var k=Array.prototype.slice,o=Array.prototype.unshift,p=Object.prototype.toString,q=Object.prototype.hasOwnProperty,r=Object.prototype.propertyIsEnumerable;b.VERSION="0.5.5";b.each=function(a,c,d){try{if(a.forEach)a.forEach(c,d);else if(b.isArray(a)||b.isArguments(a))for(var e=0,f=a.length;e<f;e++)c.call(d,
a[e],e,a);else{var g=b.keys(a);f=g.length;for(e=0;e<f;e++)c.call(d,a[g[e]],g[e],a)}}catch(h){if(h!=m)throw h;}return a};b.map=function(a,c,d){if(a&&b.isFunction(a.map))return a.map(c,d);var e=[];b.each(a,function(f,g,h){e.push(c.call(d,f,g,h))});return e};b.reduce=function(a,c,d,e){if(a&&b.isFunction(a.reduce))return a.reduce(b.bind(d,e),c);b.each(a,function(f,g,h){c=d.call(e,c,f,g,h)});return c};b.reduceRight=function(a,c,d,e){if(a&&b.isFunction(a.reduceRight))return a.reduceRight(b.bind(d,e),c);
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e)))d.push(e);return d})};b.intersect=function(a){var c=b.rest(arguments);return b.select(b.uniq(a),function(d){return b.all(c,function(e){return b.indexOf(e,d)>=0})})};b.zip=function(){for(var a=b.toArray(arguments),c=b.max(b.pluck(a,"length")),d=new Array(c),e=0;e<c;e++)d[e]=b.pluck(a,String(e));return d};b.indexOf=function(a,c){if(a.indexOf)return a.indexOf(c);for(var d=0,e=a.length;d<e;d++)if(a[d]===c)return d;return-1};b.lastIndexOf=function(a,c){if(a.lastIndexOf)return a.lastIndexOf(c);for(var d=
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var c=[];for(var d in a)q.call(a,d)&&c.push(d);return c};b.values=function(a){return b.map(a,b.identity)};b.functions=function(a){return b.select(b.keys(a),function(c){return b.isFunction(a[c])}).sort()};b.extend=function(a,c){for(var d in c)a[d]=c[d];return a};b.clone=function(a){if(b.isArray(a))return a.slice(0);return b.extend({},a)};b.tap=function(a,c){c(a);return a};b.isEqual=function(a,c){if(a===c)return true;var d=typeof a;if(d!=typeof c)return false;if(a==c)return true;if(!a&&c||a&&!c)return false;
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0};b.isElement=function(a){return!!(a&&a.nodeType==1)};b.isArray=function(a){return!!(a&&a.concat&&a.unshift)};b.isArguments=function(a){return a&&b.isNumber(a.length)&&!b.isArray(a)&&!r.call(a,"length")};b.isFunction=function(a){return!!(a&&a.constructor&&a.call&&a.apply)};b.isString=function(a){return!!(a===""||a&&a.charCodeAt&&a.substr)};b.isNumber=function(a){return p.call(a)==="[object Number]"};b.isDate=function(a){return!!(a&&a.getTimezoneOffset&&a.setUTCFullYear)};b.isRegExp=function(a){return!!(a&&
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o.call(d,this._wrapped);return l(c.apply(b,d),this._chain)}});b.each(["pop","push","reverse","shift","sort","splice","unshift"],function(a){var c=Array.prototype[a];i.prototype[a]=function(){c.apply(this._wrapped,arguments);return l(this._wrapped,this._chain)}});b.each(["concat","join","slice"],function(a){var c=Array.prototype[a];i.prototype[a]=function(){return l(c.apply(this._wrapped,arguments),this._chain)}});i.prototype.chain=function(){this._chain=true;return this};i.prototype.value=function(){return this._wrapped}})();
/*
* websupport.js
* ~~~~~~~~~~~~~
*
* sphinx.websupport utilties for all documentation.
*
* :copyright: Copyright 2007-2011 by the Sphinx team, see AUTHORS.
* :license: BSD, see LICENSE for details.
*
*/
(function($) {
$.fn.autogrow = function() {
return this.each(function() {
var textarea = this;
$.fn.autogrow.resize(textarea);
$(textarea)
.focus(function() {
textarea.interval = setInterval(function() {
$.fn.autogrow.resize(textarea);
}, 500);
})
.blur(function() {
clearInterval(textarea.interval);
});
});
};
$.fn.autogrow.resize = function(textarea) {
var lineHeight = parseInt($(textarea).css('line-height'), 10);
var lines = textarea.value.split('\n');
var columns = textarea.cols;
var lineCount = 0;
$.each(lines, function() {
lineCount += Math.ceil(this.length / columns) || 1;
});
var height = lineHeight * (lineCount + 1);
$(textarea).css('height', height);
};
})(jQuery);
(function($) {
var comp, by;
function init() {
initEvents();
initComparator();
}
function initEvents() {
$('a.comment-close').live("click", function(event) {
event.preventDefault();
hide($(this).attr('id').substring(2));
});
$('a.vote').live("click", function(event) {
event.preventDefault();
handleVote($(this));
});
$('a.reply').live("click", function(event) {
event.preventDefault();
openReply($(this).attr('id').substring(2));
});
$('a.close-reply').live("click", function(event) {
event.preventDefault();
closeReply($(this).attr('id').substring(2));
});
$('a.sort-option').live("click", function(event) {
event.preventDefault();
handleReSort($(this));
});
$('a.show-proposal').live("click", function(event) {
event.preventDefault();
showProposal($(this).attr('id').substring(2));
});
$('a.hide-proposal').live("click", function(event) {
event.preventDefault();
hideProposal($(this).attr('id').substring(2));
});
$('a.show-propose-change').live("click", function(event) {
event.preventDefault();
showProposeChange($(this).attr('id').substring(2));
});
$('a.hide-propose-change').live("click", function(event) {
event.preventDefault();
hideProposeChange($(this).attr('id').substring(2));
});
$('a.accept-comment').live("click", function(event) {
event.preventDefault();
acceptComment($(this).attr('id').substring(2));
});
$('a.delete-comment').live("click", function(event) {
event.preventDefault();
deleteComment($(this).attr('id').substring(2));
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*/
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if (by.substring(0,3) == 'asc') {
var i = by.substring(3);
comp = function(a, b) { return a[i] - b[i]; };
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*/
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by = 'rating'; // Default to sort by rating.
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var start = document.cookie.indexOf('sortBy=');
if (start != -1) {
start = start + 7;
var end = document.cookie.indexOf(";", start);
if (end == -1) {
end = document.cookie.length;
by = unescape(document.cookie.substring(start, end));
}
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}
setComparator();
}
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*/
function show(id) {
$('#ao' + id).hide();
$('#ah' + id).show();
var context = $.extend({id: id}, opts);
var popup = $(renderTemplate(popupTemplate, context)).hide();
popup.find('textarea[name="proposal"]').hide();
popup.find('a.by' + by).addClass('sel');
var form = popup.find('#cf' + id);
form.submit(function(event) {
event.preventDefault();
addComment(form);
});
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popup.slideDown('fast', function() {
getComments(id);
});
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*/
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$('#ao' + id).show();
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div.slideUp('fast', function() {
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*/
function getComments(id) {
$.ajax({
type: 'GET',
url: opts.getCommentsURL,
data: {node: id},
success: function(data, textStatus, request) {
var ul = $('#cl' + id);
var speed = 100;
$('#cf' + id)
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ul.html('<li>No comments yet.</li>');
ul.data('empty', true);
} else {
// If there are comments, sort them and put them in the list.
var comments = sortComments(data.comments);
speed = data.comments.length * 100;
appendComments(comments, ul);
ul.data('empty', false);
}
$('#cn' + id).slideUp(speed + 200);
ul.slideDown(speed);
},
error: function(request, textStatus, error) {
showError('Oops, there was a problem retrieving the comments.');
},
dataType: 'json'
});
}
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* Add a comment via ajax and insert the comment into the comment tree.
*/
function addComment(form) {
var node_id = form.find('input[name="node"]').val();
var parent_id = form.find('input[name="parent"]').val();
var text = form.find('textarea[name="comment"]').val();
var proposal = form.find('textarea[name="proposal"]').val();
if (text == '') {
showError('Please enter a comment.');
return;
}
// Disable the form that is being submitted.
form.find('textarea,input').attr('disabled', 'disabled');
// Send the comment to the server.
$.ajax({
type: "POST",
url: opts.addCommentURL,
dataType: 'json',
data: {
node: node_id,
parent: parent_id,
text: text,
proposal: proposal
},
success: function(data, textStatus, error) {
// Reset the form.
if (node_id) {
hideProposeChange(node_id);
}
form.find('textarea')
.val('')
.add(form.find('input'))
.removeAttr('disabled');
var ul = $('#cl' + (node_id || parent_id));
if (ul.data('empty')) {
$(ul).empty();
ul.data('empty', false);
}
insertComment(data.comment);
var ao = $('#ao' + node_id);
ao.find('img').attr({'src': opts.commentBrightImage});
if (node_id) {
// if this was a "root" comment, remove the commenting box
// (the user can get it back by reopening the comment popup)
$('#ca' + node_id).slideUp();
}
},
error: function(request, textStatus, error) {
form.find('textarea,input').removeAttr('disabled');
showError('Oops, there was a problem adding the comment.');
}
});
}
/**
* Recursively append comments to the main comment list and children
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*/
function appendComments(comments, ul) {
$.each(comments, function() {
var div = createCommentDiv(this);
ul.append($(document.createElement('li')).html(div));
appendComments(this.children, div.find('ul.comment-children'));
// To avoid stagnating data, don't store the comments children in data.
this.children = null;
div.data('comment', this);
});
}
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* After adding a new comment, it must be inserted in the correct
* location in the comment tree.
*/
function insertComment(comment) {
var div = createCommentDiv(comment);
// To avoid stagnating data, don't store the comments children in data.
comment.children = null;
div.data('comment', comment);
var ul = $('#cl' + (comment.node || comment.parent));
var siblings = getChildren(ul);
var li = $(document.createElement('li'));
li.hide();
// Determine where in the parents children list to insert this comment.
for(i=0; i < siblings.length; i++) {
if (comp(comment, siblings[i]) <= 0) {
$('#cd' + siblings[i].id)
.parent()
.before(li.html(div));
li.slideDown('fast');
return;
}
}
// If we get here, this comment rates lower than all the others,
// or it is the only comment in the list.
ul.append(li.html(div));
li.slideDown('fast');
}
function acceptComment(id) {
$.ajax({
type: 'POST',
url: opts.acceptCommentURL,
data: {id: id},
success: function(data, textStatus, request) {
$('#cm' + id).fadeOut('fast');
$('#cd' + id).removeClass('moderate');
},
error: function(request, textStatus, error) {
showError('Oops, there was a problem accepting the comment.');
}
});
}
function deleteComment(id) {
$.ajax({
type: 'POST',
url: opts.deleteCommentURL,
data: {id: id},
success: function(data, textStatus, request) {
var div = $('#cd' + id);
if (data == 'delete') {
// Moderator mode: remove the comment and all children immediately
div.slideUp('fast', function() {
div.remove();
});
return;
}
// User mode: only mark the comment as deleted
div
.find('span.user-id:first')
.text('[deleted]').end()
.find('div.comment-text:first')
.text('[deleted]').end()
.find('#cm' + id + ', #dc' + id + ', #ac' + id + ', #rc' + id +
', #sp' + id + ', #hp' + id + ', #cr' + id + ', #rl' + id)
.remove();
var comment = div.data('comment');
comment.username = '[deleted]';
comment.text = '[deleted]';
div.data('comment', comment);
},
error: function(request, textStatus, error) {
showError('Oops, there was a problem deleting the comment.');
}
});
}
function showProposal(id) {
$('#sp' + id).hide();
$('#hp' + id).show();
$('#pr' + id).slideDown('fast');
}
function hideProposal(id) {
$('#hp' + id).hide();
$('#sp' + id).show();
$('#pr' + id).slideUp('fast');
}
function showProposeChange(id) {
$('#pc' + id).hide();
$('#hc' + id).show();
var textarea = $('#pt' + id);
textarea.val(textarea.data('source'));
$.fn.autogrow.resize(textarea[0]);
textarea.slideDown('fast');
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$('#pc' + id).show();
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textarea.val('').removeAttr('disabled');
textarea.slideUp('fast');
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$('#mb' + id).toggle();
}
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var classes = link.attr('class').split(/\s+/);
for (var i=0; i<classes.length; i++) {
if (classes[i] != 'sort-option') {
by = classes[i].substring(2);
}
}
setComparator();
// Save/update the sortBy cookie.
var expiration = new Date();
expiration.setDate(expiration.getDate() + 365);
document.cookie= 'sortBy=' + escape(by) +
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$('ul.comment-ul').each(function(index, ul) {
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return;
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return;
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comment_id: id.substring(2),
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};
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var data = div.data('comment');
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$('#' + (d.value == 1 ? 'd' : 'u') + 'u' + d.comment_id).hide();
$('#' + (d.value == 1 ? 'd' : 'u') + 'v' + d.comment_id).show();
}
// Update the comments rating in the local data.
data.rating += (data.vote === 0) ? d.value : (d.value - data.vote);
data.vote = d.value;
div.data('comment', data);
// Change the rating text.
div.find('.rating:first')
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// Send the vote information to the server.
$.ajax({
type: "POST",
url: opts.processVoteURL,
data: d,
error: function(request, textStatus, error) {
showError('Oops, there was a problem casting that vote.');
}
});
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*/
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$('#cr' + id).show();
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$('#cl' + id)
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// Setup the submit handler for the reply form.
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event.preventDefault();
addComment($('#rf' + id));
closeReply(id);
})
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closeReply(id);
});
div.slideDown('fast', function() {
$('#rf' + id).find('textarea').focus();
});
}
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* Close the reply form opened with openReply.
*/
function closeReply(id) {
// Remove the reply div from the DOM.
$('#rd' + id).slideUp('fast', function() {
$(this).remove();
});
// Swap out the hide link for the reply link
$('#cr' + id).hide();
$('#rl' + id).show();
}
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* Recursively sort a tree of comments using the comp comparator.
*/
function sortComments(comments) {
comments.sort(comp);
$.each(comments, function() {
this.children = sortComments(this.children);
});
return comments;
}
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* Get the children comments from a ul. If recursive is true,
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*/
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var children = [];
ul.children().children("[id^='cd']")
.each(function() {
var comment = $(this).data('comment');
if (recursive)
comment.children = getChildren($(this).find('#cl' + comment.id), true);
children.push(comment);
});
return children;
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if (!comment.displayed && !opts.moderator) {
return $('<div class="moderate">Thank you! Your comment will show up '
+ 'once it is has been approved by a moderator.</div>');
}
// Prettify the comment rating.
comment.pretty_rating = comment.rating + ' point' +
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// Make a class (for displaying not yet moderated comments differently)
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var div = $(renderTemplate(commentTemplate, context));
// If the user has voted on this comment, highlight the correct arrow.
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var direction = (comment.vote == 1) ? 'u' : 'd';
div.find('#' + direction + 'v' + comment.id).hide();
div.find('#' + direction + 'u' + comment.id).show();
}
if (opts.moderator || comment.text != '[deleted]') {
div.find('a.reply').show();
if (comment.proposal_diff)
div.find('#sp' + comment.id).show();
if (opts.moderator && !comment.displayed)
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}
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var image = count > 0 ? opts.commentBrightImage : opts.commentImage;
var addcls = count == 0 ? ' nocomment' : '';
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$(document.createElement('a')).attr({
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);
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<pre class="proposal" id="pr<%id%>">\
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<li>\
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<form id="rf<%id%>">\
<textarea name="comment" cols="80"></textarea>\
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<div class="section" id="argument-validation">
<h1>Argument validation<a class="headerlink" href="#argument-validation" title="Permalink to this headline"></a></h1>
<p>CorePost integrates the popular &#8216;formencode&#8217; package to implement form and query argument validation.
Validators can be specified using a <em>formencode</em> Schema object, or via custom field-specific validators.</p>
<p>Example:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">corepost.web</span> <span class="kn">import</span> <span class="n">validate</span><span class="p">,</span> <span class="n">route</span>
<span class="kn">from</span> <span class="nn">corepost.enums</span> <span class="kn">import</span> <span class="n">Http</span>
<span class="kn">from</span> <span class="nn">formencode</span> <span class="kn">import</span> <span class="n">Schema</span><span class="p">,</span> <span class="n">validators</span>
<span class="k">class</span> <span class="nc">TestSchema</span><span class="p">(</span><span class="n">Schema</span><span class="p">):</span>
<span class="n">allow_extra_fields</span> <span class="o">=</span> <span class="bp">True</span>
<span class="n">childId</span> <span class="o">=</span> <span class="n">validators</span><span class="o">.</span><span class="n">Regex</span><span class="p">(</span><span class="n">regex</span><span class="o">=</span><span class="s">&quot;^value1|value2$&quot;</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">MyApp</span><span class="p">():</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/validate/&lt;int:rootId&gt;/schema&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">)</span>
<span class="nd">@validate</span><span class="p">(</span><span class="n">schema</span><span class="o">=</span><span class="n">TestSchema</span><span class="p">())</span>
<span class="k">def</span> <span class="nf">postValidateSchema</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">rootId</span><span class="p">,</span><span class="n">childId</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="sd">&#39;&#39;&#39;Validate using a common schema&#39;&#39;&#39;</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s"> - </span><span class="si">%s</span><span class="s"> - </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">rootId</span><span class="p">,</span><span class="n">childId</span><span class="p">,</span><span class="n">kwargs</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/validate/&lt;int:rootId&gt;/custom&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">)</span>
<span class="nd">@validate</span><span class="p">(</span><span class="n">childId</span><span class="o">=</span><span class="n">validators</span><span class="o">.</span><span class="n">Regex</span><span class="p">(</span><span class="n">regex</span><span class="o">=</span><span class="s">&quot;^value1|value2$&quot;</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">postValidateCustom</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">rootId</span><span class="p">,</span><span class="n">childId</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="sd">&#39;&#39;&#39;Validate using argument-specific validators&#39;&#39;&#39;</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s"> - </span><span class="si">%s</span><span class="s"> - </span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="p">(</span><span class="n">rootId</span><span class="p">,</span><span class="n">childId</span><span class="p">,</span><span class="n">kwargs</span><span class="p">)</span>
</pre></div>
</div>
<p>Please see the <em>FormEncode</em> documentation:</p>
<p><a class="reference external" href="http://www.formencode.org/en/latest/Validator.html">http://www.formencode.org/en/latest/Validator.html</a></p>
<p>for list of available validators:</p>
<ul class="simple">
<li>Common : <a class="reference external" href="http://www.formencode.org/en/latest/modules/validators.html#module-formencode.validators">http://www.formencode.org/en/latest/modules/validators.html#module-formencode.validators</a></li>
<li>National : <a class="reference external" href="http://www.formencode.org/en/latest/modules/national.html#module-formencode.national">http://www.formencode.org/en/latest/modules/national.html#module-formencode.national</a></li>
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<h1>Asynchronous Operations<a class="headerlink" href="#asynchronous-operations" title="Permalink to this headline"></a></h1>
<div class="section" id="defer-inlinecallbacks-support">
<h2>&#64;defer.inlineCallbacks support<a class="headerlink" href="#defer-inlinecallbacks-support" title="Permalink to this headline"></a></h2>
<p>If you want a deferred async method, just use <em>defer.returnValue()</em>:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="nd">@defer.inlineCallbacks</span>
<span class="k">def</span> <span class="nf">root</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="n">val1</span> <span class="o">=</span> <span class="k">yield</span> <span class="n">db</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="s">&quot;SELECT ....&quot;</span><span class="p">)</span>
<span class="n">val2</span> <span class="o">=</span> <span class="k">yield</span> <span class="n">db</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="s">&quot;SELECT ....&quot;</span><span class="p">)</span>
<span class="n">defer</span><span class="o">.</span><span class="n">returnValue</span><span class="p">(</span><span class="n">val1</span> <span class="o">+</span> <span class="n">val2</span><span class="p">)</span>
</pre></div>
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<p>This is standard Twisted functionality.</p>
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<h1>Content types<a class="headerlink" href="#content-types" title="Permalink to this headline"></a></h1>
<p>CorePost integrates support for JSON, YAML and XML (partially) based on request content types.</p>
<div class="section" id="parsing-of-incoming-content">
<h2>Parsing of incoming content<a class="headerlink" href="#parsing-of-incoming-content" title="Permalink to this headline"></a></h2>
<p>Based on the incoming content type in POST/PUT requests,
the body will be automatically parsed to JSON, YAML and XML (ElementTree)</p>
<ul class="simple">
<li>request.json</li>
<li>request.yaml</li>
<li>request.xml</li>
</ul>
<p>and attached to the request:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/json&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_json</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">json</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">json</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/xml&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_xml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">ElementTree</span><span class="o">.</span><span class="n">tostring</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">xml</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/yaml&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_yaml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">yaml</span><span class="o">.</span><span class="n">dump</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">yaml</span><span class="p">)</span>
</pre></div>
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<div class="section" id="converting-python-objects-to-expected-content-type">
<h2>Converting Python objects to expected content type<a class="headerlink" href="#converting-python-objects-to-expected-content-type" title="Permalink to this headline"></a></h2>
<p>Instead of returning string responses, the code can just return Python objects.
Depending whether the caller can accept JSON (default) or YAML, the Python objects will be automatically converted:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/return/by/accept&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_return_content_by_accepts</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="n">val</span> <span class="o">=</span> <span class="p">[{</span><span class="s">&quot;test1&quot;</span><span class="p">:</span><span class="s">&quot;Test1&quot;</span><span class="p">},{</span><span class="s">&quot;test2&quot;</span><span class="p">:</span><span class="s">&quot;Test2&quot;</span><span class="p">}]</span>
<span class="k">return</span> <span class="n">val</span>
</pre></div>
</div>
<p>Calling this URL with &#8220;Accept: application/json&#8221; will return:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="p">[{</span><span class="s">&quot;test1&quot;</span><span class="p">:</span> <span class="s">&quot;Test1&quot;</span><span class="p">},</span> <span class="p">{</span><span class="s">&quot;test2&quot;</span><span class="p">:</span> <span class="s">&quot;Test2&quot;</span><span class="p">}]</span>
</pre></div>
</div>
<p>Calling it with &#8220;Accept: text/yaml&#8221; will return:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="o">-</span> <span class="p">{</span><span class="n">test1</span><span class="p">:</span> <span class="n">Test1</span><span class="p">}</span>
<span class="o">-</span> <span class="p">{</span><span class="n">test2</span><span class="p">:</span> <span class="n">Test2</span><span class="p">}</span>
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<h1>Features<a class="headerlink" href="#features" title="Permalink to this headline"></a></h1>
<p>Here is a breakdown of key CorePost features</p>
<div class="section" id="url-routing">
<h2>URL Routing<a class="headerlink" href="#url-routing" title="Permalink to this headline"></a></h2>
<div class="section" id="route-decorator">
<h3>&#64;route decorator<a class="headerlink" href="#route-decorator" title="Permalink to this headline"></a></h3>
<p>Via a simple <em>&#64;route</em> decorator you can automatically route <em>twisted.web</em> Request objects to your class method
based on URL (with dynamic paths), HTTP method, expected content type, etc:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">corepost.web</span> <span class="kn">import</span> <span class="n">route</span><span class="p">,</span> <span class="n">RESTResource</span>
<span class="kn">from</span> <span class="nn">corepost.enums</span> <span class="kn">import</span> <span class="n">Http</span>
<span class="k">class</span> <span class="nc">RESTService</span><span class="p">():</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">root</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">path</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/test&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">path</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/test/&lt;int:numericid&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_get_resources</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">numericid</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">numericid</span>
<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&#39;__main__&#39;</span><span class="p">:</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">RESTResource</span><span class="p">((</span><span class="n">RESTService</span><span class="p">,))</span>
<span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">()</span>
</pre></div>
</div>
<p><em>Note</em>:</p>
<blockquote>
<div><p>This piece of code:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">()</span>
</pre></div>
</div>
<p>is just for convenience when showing code samples and writing unit tests.
In a real production application you would use existing Twisted <em>twistd</em> functionality:</p>
<ul class="simple">
<li><a class="reference external" href="http://twistedmatrix.com/documents/current/core/howto/basics.html">http://twistedmatrix.com/documents/current/core/howto/basics.html</a></li>
<li><a class="reference external" href="http://twistedmatrix.com/documents/current/core/howto/application.html">http://twistedmatrix.com/documents/current/core/howto/application.html</a></li>
<li><a class="reference external" href="http://twistedmatrix.com/documents/current/core/howto/tap.html">http://twistedmatrix.com/documents/current/core/howto/tap.html</a></li>
</ul>
</div></blockquote>
</div>
<div class="section" id="path-argument-extraction">
<h3>Path argument extraction<a class="headerlink" href="#path-argument-extraction" title="Permalink to this headline"></a></h3>
<p>CorePort can easily extract path arguments from an URL and convert them to the desired type.</p>
<p>The supported types are:</p>
<ul class="simple">
<li><em>int</em></li>
<li><em>float</em></li>
<li><em>string</em></li>
</ul>
<p>Example:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/int/&lt;int:intarg&gt;/float/&lt;float:floatarg&gt;/string/&lt;stringarg&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">intarg</span><span class="p">,</span><span class="n">floatarg</span><span class="p">,</span><span class="n">stringarg</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">pass</span>
</pre></div>
</div>
</div>
<div class="section" id="argument-validation">
<h3>Argument validation<a class="headerlink" href="#argument-validation" title="Permalink to this headline"></a></h3>
<p>CorePost integrates the popular &#8216;formencode&#8217; package to implement form and query argument validation.
Validators can be specified using a <em>formencode</em> Schema object, or via custom field-specific validators.</p>
<p>Example:</p>
<div class="highlight-python"><pre>from corepost.web import validate, route
from corepost.enums import Http
from formencode import Schema, validators
class TestSchema(Schema):
allow_extra_fields = True
childId = validators.Regex(regex="^value1|value2$")
class MyApp():
@route("/validate/&lt;int:rootId&gt;/schema",Http.POST)
@validate(schema=TestSchema())
def postValidateSchema(self,request,rootId,childId,**kwargs):
'''Validate using a common schema'''
return "%s - %s - %s" % (rootId,childId,kwargs)
@route("/validate/&lt;int:rootId&gt;/custom",Http.POST)
@validate(childId=validators.Regex(regex="^value1|value2$"))
def postValidateCustom(self,request,rootId,childId,**kwargs):
'''Validate using argument-specific validators'
return "%s - %s - %s" % (rootId,childId,kwargs)</pre>
</div>
<p>Please see the <em>FormEncode</em> &lt;<a class="reference external" href="http://www.formencode.org/en/latest/Validator.html">http://www.formencode.org/en/latest/Validator.html</a>&gt; documentation
for list of available validators:</p>
<ul class="simple">
<li>Common &lt;<a class="reference external" href="http://www.formencode.org/en/latest/modules/validators.html#module-formencode.validators">http://www.formencode.org/en/latest/modules/validators.html#module-formencode.validators</a>&gt;</li>
<li>National &lt;<a class="reference external" href="http://www.formencode.org/en/latest/modules/national.html#module-formencode.national">http://www.formencode.org/en/latest/modules/national.html#module-formencode.national</a>&gt;</li>
</ul>
</div>
<div class="section" id="multiple-rest-services-under-a-common-root-url">
<h3>Multiple REST services under a common root URL<a class="headerlink" href="#multiple-rest-services-under-a-common-root-url" title="Permalink to this headline"></a></h3>
<p>A typical case in REST is where you have parent/child resources (business entities), e.g.</p>
<div class="highlight-python"><pre>Customer
Customer Address
Customer Phone
Customer Order
Customer Invoice
Customer Invoice Payment</pre>
</div>
<p>etc.</p>
<p>This can create a URL structure like:</p>
<div class="highlight-python"><pre>/customer
/customer/&lt;customerId&gt;
/customer/&lt;customerId&gt;/address
/customer/&lt;customerId&gt;/address/&lt;addressId&gt;
/customer/&lt;customerId&gt;/phone
/customer/&lt;customerId&gt;/phone/&lt;phoneId&gt;
/customer/&lt;customerId&gt;/invoice
/customer/&lt;customerId&gt;/invoice/&lt;invoiceId&gt;
/customer/&lt;customerId&gt;/invoice/&lt;invoiceId&gt;/payment
/customer/&lt;customerId&gt;/invoice/&lt;invoiceId&gt;/payment/&lt;paymentId&gt;</pre>
</div>
<p>CorePost allows you to write small, modular classes that implement a REST service for just a single entity,
driven by URL paths with dynamic elements in them (e.g. the <em>customerId</em>, <em>invoiceId</em>, <em>paymentId</em> path parameters in the sample above).
You do not have to mesh all these different entities in a single class.</p>
<p>At the end, you wrap all of the different REST services in a single <em>RESTResource</em> object (which extends the regular Twisted Web Resource object)
and it takes care of routing the request to the appropriate class.</p>
<p>Here is a full-blown example of two REST services for Customer and Customer Address:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">corepost</span> <span class="kn">import</span> <span class="n">Response</span><span class="p">,</span> <span class="n">NotFoundException</span><span class="p">,</span> <span class="n">AlreadyExistsException</span>
<span class="kn">from</span> <span class="nn">corepost.web</span> <span class="kn">import</span> <span class="n">RESTResource</span><span class="p">,</span> <span class="n">route</span><span class="p">,</span> <span class="n">Http</span>
<span class="k">class</span> <span class="nc">CustomerRESTService</span><span class="p">():</span>
<span class="n">path</span> <span class="o">=</span> <span class="s">&quot;/customer&quot;</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">getAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getAllCustomers</span><span class="p">()</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;customerId&gt;&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">post</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">firstName</span><span class="p">,</span><span class="n">lastName</span><span class="p">):</span>
<span class="n">customer</span> <span class="o">=</span> <span class="n">Customer</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">firstName</span><span class="p">,</span> <span class="n">lastName</span><span class="p">)</span>
<span class="n">DB</span><span class="o">.</span><span class="n">saveCustomer</span><span class="p">(</span><span class="n">customer</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">201</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;customerId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">put</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">firstName</span><span class="p">,</span><span class="n">lastName</span><span class="p">):</span>
<span class="n">c</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="p">(</span><span class="n">c</span><span class="o">.</span><span class="n">firstName</span><span class="p">,</span><span class="n">c</span><span class="o">.</span><span class="n">lastName</span><span class="p">)</span> <span class="o">=</span> <span class="p">(</span><span class="n">firstName</span><span class="p">,</span><span class="n">lastName</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;customerId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">delete</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="n">DB</span><span class="o">.</span><span class="n">deleteCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">deleteAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="n">DB</span><span class="o">.</span><span class="n">deleteAllCustomers</span><span class="p">()</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">CustomerAddressRESTService</span><span class="p">():</span>
<span class="n">path</span> <span class="o">=</span> <span class="s">&quot;/customer/&lt;customerId&gt;/address&quot;</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">getAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span><span class="o">.</span><span class="n">addresses</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;addressId&gt;&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomerAddress</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">addressId</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">post</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">,</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">):</span>
<span class="n">c</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="n">address</span> <span class="o">=</span> <span class="n">CustomerAddress</span><span class="p">(</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">addresses</span><span class="p">[</span><span class="n">addressId</span><span class="p">]</span> <span class="o">=</span> <span class="n">address</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">201</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;addressId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">put</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">,</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">):</span>
<span class="n">address</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomerAddress</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">addressId</span><span class="p">)</span>
<span class="p">(</span><span class="n">address</span><span class="o">.</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">address</span><span class="o">.</span><span class="n">streetName</span><span class="p">,</span><span class="n">address</span><span class="o">.</span><span class="n">stateCode</span><span class="p">,</span><span class="n">address</span><span class="o">.</span><span class="n">countryCode</span><span class="p">)</span> <span class="o">=</span> <span class="p">(</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;addressId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">delete</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">):</span>
<span class="n">DB</span><span class="o">.</span><span class="n">getCustomerAddress</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">addressId</span><span class="p">)</span> <span class="c">#validate address exists</span>
<span class="k">del</span><span class="p">(</span><span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span><span class="o">.</span><span class="n">addresses</span><span class="p">[</span><span class="n">addressId</span><span class="p">])</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">deleteAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="n">c</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">addresses</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">run_rest_app</span><span class="p">():</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">RESTResource</span><span class="p">((</span><span class="n">CustomerRESTService</span><span class="p">(),</span><span class="n">CustomerAddressRESTService</span><span class="p">()))</span>
<span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="mi">8080</span><span class="p">)</span>
<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&quot;__main__&quot;</span><span class="p">:</span>
<span class="n">run_rest_app</span><span class="p">()</span>
</pre></div>
</div>
</div>
</div>
<div class="section" id="content-types">
<h2>Content types<a class="headerlink" href="#content-types" title="Permalink to this headline"></a></h2>
<p>CorePost integrates support for JSON, YAML and XML (partially) based on request content types.</p>
<p><em>Parsing of incoming content</em></p>
<p>Based on the incoming content type in POST/PUT requests,
the body will be automatically parsed to JSON, YAML and XML (ElementTree)</p>
<ul class="simple">
<li>request.json</li>
<li>request.yaml</li>
<li>request.xml</li>
</ul>
<p>and attached to the request:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/json&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_json</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">json</span><span class="o">.</span><span class="n">dumps</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">json</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/xml&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_xml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">ElementTree</span><span class="o">.</span><span class="n">tostring</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">xml</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/yaml&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_yaml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">yaml</span><span class="o">.</span><span class="n">dump</span><span class="p">(</span><span class="n">request</span><span class="o">.</span><span class="n">yaml</span><span class="p">)</span>
</pre></div>
</div>
<div class="section" id="routing-requests-by-incoming-content-type">
<h3>Routing requests by incoming content type<a class="headerlink" href="#routing-requests-by-incoming-content-type" title="Permalink to this headline"></a></h3>
<p>Based on the incoming content type in POST/PUT requests, the <em>same</em> URL can be hooked up to different router methods:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">),</span><span class="n">MediaType</span><span class="o">.</span><span class="n">APPLICATION_JSON</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_content_app_json</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="n">HttpHeader</span><span class="o">.</span><span class="n">CONTENT_TYPE</span><span class="p">]</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">),(</span><span class="n">MediaType</span><span class="o">.</span><span class="n">TEXT_XML</span><span class="p">,</span><span class="n">MediaType</span><span class="o">.</span><span class="n">APPLICATION_XML</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_content_xml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="n">HttpHeader</span><span class="o">.</span><span class="n">CONTENT_TYPE</span><span class="p">]</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">),</span><span class="n">MediaType</span><span class="o">.</span><span class="n">TEXT_YAML</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_content_yaml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="n">HttpHeader</span><span class="o">.</span><span class="n">CONTENT_TYPE</span><span class="p">]</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_content_catch_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">MediaType</span><span class="o">.</span><span class="n">WILDCARD</span>
</pre></div>
</div>
</div>
<div class="section" id="converting-python-objects-to-content-type-based-on-what-caller-can-accept">
<h3>Converting Python objects to content type based on what caller can accept<a class="headerlink" href="#converting-python-objects-to-content-type-based-on-what-caller-can-accept" title="Permalink to this headline"></a></h3>
<p>Instead of returning string responses, the code can just return Python objects.
Depending whether the caller can accept JSON (default) or YAML, the Python objects will be automatically converted:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/return/by/accept&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_return_content_by_accepts</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="n">val</span> <span class="o">=</span> <span class="p">[{</span><span class="s">&quot;test1&quot;</span><span class="p">:</span><span class="s">&quot;Test1&quot;</span><span class="p">},{</span><span class="s">&quot;test2&quot;</span><span class="p">:</span><span class="s">&quot;Test2&quot;</span><span class="p">}]</span>
<span class="k">return</span> <span class="n">val</span>
</pre></div>
</div>
<p>Calling this URL with &#8220;Accept: application/json&#8221; will return:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="p">[{</span><span class="s">&quot;test1&quot;</span><span class="p">:</span> <span class="s">&quot;Test1&quot;</span><span class="p">},</span> <span class="p">{</span><span class="s">&quot;test2&quot;</span><span class="p">:</span> <span class="s">&quot;Test2&quot;</span><span class="p">}]</span>
</pre></div>
</div>
<p>Calling it with &#8220;Accept: text/yaml&#8221; will return:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="o">-</span> <span class="p">{</span><span class="n">test1</span><span class="p">:</span> <span class="n">Test1</span><span class="p">}</span>
<span class="o">-</span> <span class="p">{</span><span class="n">test2</span><span class="p">:</span> <span class="n">Test2</span><span class="p">}</span>
</pre></div>
</div>
</div>
</div>
<div class="section" id="filters">
<h2>Filters<a class="headerlink" href="#filters" title="Permalink to this headline"></a></h2>
<p>There is support for CorePost resource filters via the two following <em>corepost.filter</em> interfaces:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">class</span> <span class="nc">IRequestFilter</span><span class="p">(</span><span class="n">Interface</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Request filter interface&quot;&quot;&quot;</span>
<span class="k">def</span> <span class="nf">filterRequest</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Allows to intercept and change an incoming request&quot;&quot;&quot;</span>
<span class="k">pass</span>
<span class="k">class</span> <span class="nc">IResponseFilter</span><span class="p">(</span><span class="n">Interface</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Response filter interface&quot;&quot;&quot;</span>
<span class="k">def</span> <span class="nf">filterResponse</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">response</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Allows to intercept and change an outgoing response&quot;&quot;&quot;</span>
<span class="k">pass</span>
</pre></div>
</div>
<p>A filter class can implement either of them or both (for a wrap around filter), e.g.:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">class</span> <span class="nc">AddCustomHeaderFilter</span><span class="p">():</span>
<span class="sd">&quot;&quot;&quot;Implements a request filter that adds a custom header to the incoming request&quot;&quot;&quot;</span>
<span class="n">zope</span><span class="o">.</span><span class="n">interface</span><span class="o">.</span><span class="n">implements</span><span class="p">(</span><span class="n">IRequestFilter</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">filterRequest</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="s">&quot;Custom-Header&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;Custom Header Value&quot;</span>
<span class="k">class</span> <span class="nc">Change404to503Filter</span><span class="p">():</span>
<span class="sd">&quot;&quot;&quot;Implements just a response filter that changes 404 to 503 statuses&quot;&quot;&quot;</span>
<span class="n">zope</span><span class="o">.</span><span class="n">interface</span><span class="o">.</span><span class="n">implements</span><span class="p">(</span><span class="n">IResponseFilter</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">filterResponse</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">response</span><span class="p">):</span>
<span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">code</span> <span class="o">==</span> <span class="mi">404</span><span class="p">:</span>
<span class="n">response</span><span class="o">.</span><span class="n">code</span> <span class="o">=</span> <span class="mi">503</span>
<span class="k">class</span> <span class="nc">WrapAroundFilter</span><span class="p">():</span>
<span class="sd">&quot;&quot;&quot;Implements both types of filters in one class&quot;&quot;&quot;</span>
<span class="n">zope</span><span class="o">.</span><span class="n">interface</span><span class="o">.</span><span class="n">implements</span><span class="p">(</span><span class="n">IRequestFilter</span><span class="p">,</span><span class="n">IResponseFilter</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">filterRequest</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="s">&quot;X-Wrap-Input&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;Input&quot;</span>
<span class="k">def</span> <span class="nf">filterResponse</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">response</span><span class="p">):</span>
<span class="n">response</span><span class="o">.</span><span class="n">headers</span><span class="p">[</span><span class="s">&quot;X-Wrap-Output&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;Output&quot;</span>
</pre></div>
</div>
<p>In order to activate the filters on a RESTResource instance, you need to pass a list of them in the constructor as the <em>filters</em> parameter, e.g.:</p>
<div class="highlight-python"><pre>class FilterApp():
@route("/",Http.GET)
def root(self,request,**kwargs):
return request.received_headers
def run_filter_app():
app = RESTResource(services=((FilterApp(),),filters=(Change404to503Filter(),AddCustomHeaderFilter(),WrapAroundFilter(),))
app.run(8083)</pre>
</div>
</div>
<div class="section" id="asynchronous-operations">
<h2>Asynchronous Operations<a class="headerlink" href="#asynchronous-operations" title="Permalink to this headline"></a></h2>
<div class="section" id="defer-inlinecallbacks-support">
<h3>&#64;defer.inlineCallbacks support<a class="headerlink" href="#defer-inlinecallbacks-support" title="Permalink to this headline"></a></h3>
<p>If you want a deferred async method, just use <em>defer.returnValue()</em>:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="nd">@defer.inlineCallbacks</span>
<span class="k">def</span> <span class="nf">root</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="n">val1</span> <span class="o">=</span> <span class="k">yield</span> <span class="n">db</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="s">&quot;SELECT ....&quot;</span><span class="p">)</span>
<span class="n">val2</span> <span class="o">=</span> <span class="k">yield</span> <span class="n">db</span><span class="o">.</span><span class="n">query</span><span class="p">(</span><span class="s">&quot;SELECT ....&quot;</span><span class="p">)</span>
<span class="n">defer</span><span class="o">.</span><span class="n">returnValue</span><span class="p">(</span><span class="n">val1</span> <span class="o">+</span> <span class="n">val2</span><span class="p">)</span>
</pre></div>
</div>
<p>This is standard Twisted functionality.</p>
</div>
</div>
<div class="section" id="http-codes">
<h2>HTTP codes<a class="headerlink" href="#http-codes" title="Permalink to this headline"></a></h2>
<p>By default, CorePost returns the appropriate HTTP code based on the HTTP method:</p>
<p>Success:</p>
<ul class="simple">
<li>200 (OK) - GET, DELETE, PUT</li>
<li>201 (Created) - POST</li>
</ul>
<p>Errors:</p>
<ul class="simple">
<li>404 - not able to match any URL</li>
<li>400 - missing mandatory argument (driven from the arguments on the actual functions)</li>
<li>400 - argument failed validation</li>
<li>500 - server error</li>
</ul>
</div>
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<h3><a href="index.html">Table Of Contents</a></h3>
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<li><a class="reference internal" href="#">Features</a><ul>
<li><a class="reference internal" href="#url-routing">URL Routing</a><ul>
<li><a class="reference internal" href="#route-decorator">&#64;route decorator</a></li>
<li><a class="reference internal" href="#path-argument-extraction">Path argument extraction</a></li>
<li><a class="reference internal" href="#argument-validation">Argument validation</a></li>
<li><a class="reference internal" href="#multiple-rest-services-under-a-common-root-url">Multiple REST services under a common root URL</a></li>
</ul>
</li>
<li><a class="reference internal" href="#content-types">Content types</a><ul>
<li><a class="reference internal" href="#routing-requests-by-incoming-content-type">Routing requests by incoming content type</a></li>
<li><a class="reference internal" href="#converting-python-objects-to-content-type-based-on-what-caller-can-accept">Converting Python objects to content type based on what caller can accept</a></li>
</ul>
</li>
<li><a class="reference internal" href="#filters">Filters</a></li>
<li><a class="reference internal" href="#asynchronous-operations">Asynchronous Operations</a><ul>
<li><a class="reference internal" href="#defer-inlinecallbacks-support">&#64;defer.inlineCallbacks support</a></li>
</ul>
</li>
<li><a class="reference internal" href="#http-codes">HTTP codes</a></li>
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<div class="section" id="filters">
<h1>Filters<a class="headerlink" href="#filters" title="Permalink to this headline"></a></h1>
<p>There is support for CorePost resource filters via the two following <em>corepost.filter</em> interfaces:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">class</span> <span class="nc">IRequestFilter</span><span class="p">(</span><span class="n">Interface</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Request filter interface&quot;&quot;&quot;</span>
<span class="k">def</span> <span class="nf">filterRequest</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Allows to intercept and change an incoming request&quot;&quot;&quot;</span>
<span class="k">pass</span>
<span class="k">class</span> <span class="nc">IResponseFilter</span><span class="p">(</span><span class="n">Interface</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Response filter interface&quot;&quot;&quot;</span>
<span class="k">def</span> <span class="nf">filterResponse</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">response</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Allows to intercept and change an outgoing response&quot;&quot;&quot;</span>
<span class="k">pass</span>
</pre></div>
</div>
<p>A filter class can implement either of them or both (for a wrap around filter), e.g.:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">class</span> <span class="nc">AddCustomHeaderFilter</span><span class="p">():</span>
<span class="sd">&quot;&quot;&quot;Implements a request filter that adds a custom header to the incoming request&quot;&quot;&quot;</span>
<span class="n">zope</span><span class="o">.</span><span class="n">interface</span><span class="o">.</span><span class="n">implements</span><span class="p">(</span><span class="n">IRequestFilter</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">filterRequest</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="s">&quot;Custom-Header&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;Custom Header Value&quot;</span>
<span class="k">class</span> <span class="nc">Change404to503Filter</span><span class="p">():</span>
<span class="sd">&quot;&quot;&quot;Implements just a response filter that changes 404 to 503 statuses&quot;&quot;&quot;</span>
<span class="n">zope</span><span class="o">.</span><span class="n">interface</span><span class="o">.</span><span class="n">implements</span><span class="p">(</span><span class="n">IResponseFilter</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">filterResponse</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">response</span><span class="p">):</span>
<span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">code</span> <span class="o">==</span> <span class="mi">404</span><span class="p">:</span>
<span class="n">response</span><span class="o">.</span><span class="n">code</span> <span class="o">=</span> <span class="mi">503</span>
<span class="k">class</span> <span class="nc">WrapAroundFilter</span><span class="p">():</span>
<span class="sd">&quot;&quot;&quot;Implements both types of filters in one class&quot;&quot;&quot;</span>
<span class="n">zope</span><span class="o">.</span><span class="n">interface</span><span class="o">.</span><span class="n">implements</span><span class="p">(</span><span class="n">IRequestFilter</span><span class="p">,</span><span class="n">IResponseFilter</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">filterRequest</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="s">&quot;X-Wrap-Input&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;Input&quot;</span>
<span class="k">def</span> <span class="nf">filterResponse</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">response</span><span class="p">):</span>
<span class="n">response</span><span class="o">.</span><span class="n">headers</span><span class="p">[</span><span class="s">&quot;X-Wrap-Output&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;Output&quot;</span>
</pre></div>
</div>
<p>In order to activate the filters on a RESTResource instance, you need to pass a list of them in the constructor as the <em>filters</em> parameter, e.g.:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">class</span> <span class="nc">FilterApp</span><span class="p">:</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">root</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">received_headers</span>
<span class="k">def</span> <span class="nf">run_filter_app</span><span class="p">():</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">RESTResource</span><span class="p">(</span><span class="n">services</span><span class="o">=</span><span class="p">(</span><span class="n">FilterApp</span><span class="p">(),),</span><span class="n">filters</span><span class="o">=</span><span class="p">(</span><span class="n">Change404to503Filter</span><span class="p">(),</span><span class="n">AddCustomHeaderFilter</span><span class="p">(),</span><span class="n">WrapAroundFilter</span><span class="p">(),))</span>
<span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="mi">8083</span><span class="p">)</span>
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<p>CorePost is a Python REST micro-framework. It is meant for building enterprise-grade REST server applications that provide
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<h2>What is Twisted?<a class="headerlink" href="#what-is-twisted" title="Permalink to this headline"></a></h2>
<p>Twisted is a very mature Python async I/O network toolkit:</p>
<p><a class="reference external" href="http://twistedmatrix.com/trac/">http://twistedmatrix.com/trac/</a></p>
<p>Understanding core principles behind Twisted and its APIs is required (at least at a basic level) before coding any CorePost application.</p>
<p>Hence we recommend either reading the very thorough developer&#8217;s guide:</p>
<p><a class="reference external" href="http://twistedmatrix.com/documents/current/core/howto/book.pdf">http://twistedmatrix.com/documents/current/core/howto/book.pdf</a></p>
<p>or the excellent Twisted tutorials from Dave Peticolas:</p>
<p><a class="reference external" href="http://krondo.com/blog/?page_id=1327">http://krondo.com/blog/?page_id=1327</a></p>
<p>In particular, understanding the core Twisted Deferred object (and its productive inline callback approach) are crucial
to productive usage of Twisted APIs for writing asynchronous web applications.</p>
</div>
<div class="section" id="what-does-corepost-add-on-top-of-twisted-web">
<h2>What does CorePost add on top of Twisted Web?<a class="headerlink" href="#what-does-corepost-add-on-top-of-twisted-web" title="Permalink to this headline"></a></h2>
<p>Mostly productivity features that take of low-level plumbing such as:</p>
<ul class="simple">
<li>routing request to handler methods</li>
<li>automatic parsing of JSON/YAML/XML input</li>
<li>automatic conversion of Python objects and classes to JSON / YAML / XML formats</li>
<li>simplified exception handling</li>
<li>custom request / response filters</li>
</ul>
<p>However, this is a very thin layer. Once you get to write some serious code that interacts with an external system (e.g. a SQL database)
you are writing a hard-code Twisted web application. CorePost is just there to make it easier for you and let you focus on business logic,
while letting it take care of common required plumbing. That&#8217;s it.</p>
<p>A CorePost application is nothing more than a <em>twisted.web</em> application under the hood.</p>
</div>
<div class="section" id="why-would-i-use-corepost-instead-of-node-js">
<h2>Why would I use CorePost instead of Node.js?<a class="headerlink" href="#why-would-i-use-corepost-instead-of-node-js" title="Permalink to this headline"></a></h2>
<p>As you develop more Twisted code, you will realize how its elegant and powerful <em>Deferred</em> object
(and especially inline callbacks) make developing <em>readable</em> asynchronous code much more pleasant than any other solution.</p>
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<div class="section" id="modular-rest-applications">
<h1>Modular REST applications<a class="headerlink" href="#modular-rest-applications" title="Permalink to this headline"></a></h1>
<p>A typical case in REST is where you have parent/child resources (business entities), e.g.</p>
<div class="highlight-python"><pre>Customer
Customer Address
Customer Phone
Customer Order
Customer Invoice
Customer Invoice Payment</pre>
</div>
<p>etc.</p>
<p>This can create a URL structure like:</p>
<div class="highlight-python"><pre>/customer
/customer/&lt;customerId&gt;
/customer/&lt;customerId&gt;/address
/customer/&lt;customerId&gt;/address/&lt;addressId&gt;
/customer/&lt;customerId&gt;/phone
/customer/&lt;customerId&gt;/phone/&lt;phoneId&gt;
/customer/&lt;customerId&gt;/invoice
/customer/&lt;customerId&gt;/invoice/&lt;invoiceId&gt;
/customer/&lt;customerId&gt;/invoice/&lt;invoiceId&gt;/payment
/customer/&lt;customerId&gt;/invoice/&lt;invoiceId&gt;/payment/&lt;paymentId&gt;</pre>
</div>
<p>CorePost allows you to write small, modular classes that implement a REST service for just a single entity,
driven by URL paths with dynamic elements in them (e.g. the <em>customerId</em>, <em>invoiceId</em>, <em>paymentId</em> path parameters in the sample above).
You do not have to mesh all these different entities in a single class.</p>
<p>At the end, you wrap all of the different REST services in a single <em>RESTResource</em> object (which extends the regular Twisted Web Resource object)
and it takes care of routing the request to the appropriate class.</p>
<p>Here is a full-blown example of two REST services for Customer and Customer Address:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">corepost</span> <span class="kn">import</span> <span class="n">Response</span><span class="p">,</span> <span class="n">NotFoundException</span><span class="p">,</span> <span class="n">AlreadyExistsException</span>
<span class="kn">from</span> <span class="nn">corepost.web</span> <span class="kn">import</span> <span class="n">RESTResource</span><span class="p">,</span> <span class="n">route</span><span class="p">,</span> <span class="n">Http</span>
<span class="k">class</span> <span class="nc">CustomerRESTService</span><span class="p">():</span>
<span class="n">path</span> <span class="o">=</span> <span class="s">&quot;/customer&quot;</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">getAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getAllCustomers</span><span class="p">()</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;customerId&gt;&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">post</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">firstName</span><span class="p">,</span><span class="n">lastName</span><span class="p">):</span>
<span class="n">customer</span> <span class="o">=</span> <span class="n">Customer</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">firstName</span><span class="p">,</span> <span class="n">lastName</span><span class="p">)</span>
<span class="n">DB</span><span class="o">.</span><span class="n">saveCustomer</span><span class="p">(</span><span class="n">customer</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">201</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;customerId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">put</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">firstName</span><span class="p">,</span><span class="n">lastName</span><span class="p">):</span>
<span class="n">c</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="p">(</span><span class="n">c</span><span class="o">.</span><span class="n">firstName</span><span class="p">,</span><span class="n">c</span><span class="o">.</span><span class="n">lastName</span><span class="p">)</span> <span class="o">=</span> <span class="p">(</span><span class="n">firstName</span><span class="p">,</span><span class="n">lastName</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;customerId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">delete</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="n">DB</span><span class="o">.</span><span class="n">deleteCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">deleteAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="n">DB</span><span class="o">.</span><span class="n">deleteAllCustomers</span><span class="p">()</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">CustomerAddressRESTService</span><span class="p">():</span>
<span class="n">path</span> <span class="o">=</span> <span class="s">&quot;/customer/&lt;customerId&gt;/address&quot;</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">getAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span><span class="o">.</span><span class="n">addresses</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;addressId&gt;&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomerAddress</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">addressId</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">post</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">,</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">):</span>
<span class="n">c</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="n">address</span> <span class="o">=</span> <span class="n">CustomerAddress</span><span class="p">(</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">addresses</span><span class="p">[</span><span class="n">addressId</span><span class="p">]</span> <span class="o">=</span> <span class="n">address</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">201</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;addressId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">put</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">,</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">):</span>
<span class="n">address</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomerAddress</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">addressId</span><span class="p">)</span>
<span class="p">(</span><span class="n">address</span><span class="o">.</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">address</span><span class="o">.</span><span class="n">streetName</span><span class="p">,</span><span class="n">address</span><span class="o">.</span><span class="n">stateCode</span><span class="p">,</span><span class="n">address</span><span class="o">.</span><span class="n">countryCode</span><span class="p">)</span> <span class="o">=</span> <span class="p">(</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;addressId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">delete</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">):</span>
<span class="n">DB</span><span class="o">.</span><span class="n">getCustomerAddress</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">addressId</span><span class="p">)</span> <span class="c">#validate address exists</span>
<span class="k">del</span><span class="p">(</span><span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span><span class="o">.</span><span class="n">addresses</span><span class="p">[</span><span class="n">addressId</span><span class="p">])</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">deleteAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="n">c</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">addresses</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">run_rest_app</span><span class="p">():</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">RESTResource</span><span class="p">((</span><span class="n">CustomerRESTService</span><span class="p">(),</span><span class="n">CustomerAddressRESTService</span><span class="p">()))</span>
<span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="mi">8080</span><span class="p">)</span>
<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&quot;__main__&quot;</span><span class="p">:</span>
<span class="n">run_rest_app</span><span class="p">()</span>
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<div class="section" id="url-routing">
<h1>URL Routing<a class="headerlink" href="#url-routing" title="Permalink to this headline"></a></h1>
<div class="section" id="route-decorator">
<h2>&#64;route decorator<a class="headerlink" href="#route-decorator" title="Permalink to this headline"></a></h2>
<p>Via a simple <em>&#64;route</em> decorator you can automatically route <em>twisted.web</em> Request objects to your class method
based on URL (with dynamic paths), HTTP method, expected content type, etc:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">corepost.web</span> <span class="kn">import</span> <span class="n">route</span><span class="p">,</span> <span class="n">RESTResource</span>
<span class="kn">from</span> <span class="nn">corepost.enums</span> <span class="kn">import</span> <span class="n">Http</span>
<span class="k">class</span> <span class="nc">RESTService</span><span class="p">():</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">root</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">path</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/test&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">path</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/test/&lt;int:numericid&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_get_resources</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">numericid</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">numericid</span>
<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&#39;__main__&#39;</span><span class="p">:</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">RESTResource</span><span class="p">((</span><span class="n">RESTService</span><span class="p">,))</span>
<span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">()</span>
</pre></div>
</div>
<p><em>Note</em>:</p>
<blockquote>
<div><p>This piece of code:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">()</span>
</pre></div>
</div>
<p>is just for convenience when showing code samples and writing unit tests.
In a real production application you would use existing Twisted <em>twistd</em> functionality:</p>
<ul class="simple">
<li><a class="reference external" href="http://twistedmatrix.com/documents/current/core/howto/basics.html">http://twistedmatrix.com/documents/current/core/howto/basics.html</a></li>
<li><a class="reference external" href="http://twistedmatrix.com/documents/current/core/howto/application.html">http://twistedmatrix.com/documents/current/core/howto/application.html</a></li>
<li><a class="reference external" href="http://twistedmatrix.com/documents/current/core/howto/tap.html">http://twistedmatrix.com/documents/current/core/howto/tap.html</a></li>
</ul>
</div></blockquote>
</div>
<div class="section" id="path-argument-extraction">
<h2>Path argument extraction<a class="headerlink" href="#path-argument-extraction" title="Permalink to this headline"></a></h2>
<p>CorePort can easily extract path arguments from an URL and convert them to the desired type.</p>
<p>The supported types are:</p>
<ul class="simple">
<li><em>int</em></li>
<li><em>float</em></li>
<li><em>string</em></li>
</ul>
<p>Example:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/int/&lt;int:intarg&gt;/float/&lt;float:floatarg&gt;/string/&lt;stringarg&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">intarg</span><span class="p">,</span><span class="n">floatarg</span><span class="p">,</span><span class="n">stringarg</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">pass</span>
</pre></div>
</div>
</div>
<div class="section" id="routing-requests-by-incoming-content-type">
<h2>Routing requests by incoming content type<a class="headerlink" href="#routing-requests-by-incoming-content-type" title="Permalink to this headline"></a></h2>
<p>Based on the incoming content type in POST/PUT requests, the <em>same</em> URL can be hooked up to different router methods:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">),</span><span class="n">MediaType</span><span class="o">.</span><span class="n">APPLICATION_JSON</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_content_app_json</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="n">HttpHeader</span><span class="o">.</span><span class="n">CONTENT_TYPE</span><span class="p">]</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">),(</span><span class="n">MediaType</span><span class="o">.</span><span class="n">TEXT_XML</span><span class="p">,</span><span class="n">MediaType</span><span class="o">.</span><span class="n">APPLICATION_XML</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_content_xml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="n">HttpHeader</span><span class="o">.</span><span class="n">CONTENT_TYPE</span><span class="p">]</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">),</span><span class="n">MediaType</span><span class="o">.</span><span class="n">TEXT_YAML</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_content_yaml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="n">HttpHeader</span><span class="o">.</span><span class="n">CONTENT_TYPE</span><span class="p">]</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_content_catch_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">MediaType</span><span class="o">.</span><span class="n">WILDCARD</span>
</pre></div>
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<h3><a href="index.html">Table Of Contents</a></h3>
<ul>
<li><a class="reference internal" href="#">URL Routing</a><ul>
<li><a class="reference internal" href="#route-decorator">&#64;route decorator</a></li>
<li><a class="reference internal" href="#path-argument-extraction">Path argument extraction</a></li>
<li><a class="reference internal" href="#routing-requests-by-incoming-content-type">Routing requests by incoming content type</a></li>
</ul>
</li>
</ul>
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<h1>Filters<a class="headerlink" href="#filters" title="Permalink to this headline"></a></h1>
<p>There is support for CorePost resource filters via the two following <em>corepost.filter</em> interfaces:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">class</span> <span class="nc">IRequestFilter</span><span class="p">(</span><span class="n">Interface</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Request filter interface&quot;&quot;&quot;</span>
<span class="k">def</span> <span class="nf">filterRequest</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Allows to intercept and change an incoming request&quot;&quot;&quot;</span>
<span class="k">pass</span>
<span class="k">class</span> <span class="nc">IResponseFilter</span><span class="p">(</span><span class="n">Interface</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Response filter interface&quot;&quot;&quot;</span>
<span class="k">def</span> <span class="nf">filterResponse</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">response</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Allows to intercept and change an outgoing response&quot;&quot;&quot;</span>
<span class="k">pass</span>
</pre></div>
</div>
<p>A filter class can implement either of them or both (for a wrap around filter), e.g.:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">class</span> <span class="nc">AddCustomHeaderFilter</span><span class="p">():</span>
<span class="sd">&quot;&quot;&quot;Implements a request filter that adds a custom header to the incoming request&quot;&quot;&quot;</span>
<span class="n">zope</span><span class="o">.</span><span class="n">interface</span><span class="o">.</span><span class="n">implements</span><span class="p">(</span><span class="n">IRequestFilter</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">filterRequest</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="s">&quot;Custom-Header&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;Custom Header Value&quot;</span>
<span class="k">class</span> <span class="nc">Change404to503Filter</span><span class="p">():</span>
<span class="sd">&quot;&quot;&quot;Implements just a response filter that changes 404 to 503 statuses&quot;&quot;&quot;</span>
<span class="n">zope</span><span class="o">.</span><span class="n">interface</span><span class="o">.</span><span class="n">implements</span><span class="p">(</span><span class="n">IResponseFilter</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">filterResponse</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">response</span><span class="p">):</span>
<span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">code</span> <span class="o">==</span> <span class="mi">404</span><span class="p">:</span>
<span class="n">response</span><span class="o">.</span><span class="n">code</span> <span class="o">=</span> <span class="mi">503</span>
<span class="k">class</span> <span class="nc">WrapAroundFilter</span><span class="p">():</span>
<span class="sd">&quot;&quot;&quot;Implements both types of filters in one class&quot;&quot;&quot;</span>
<span class="n">zope</span><span class="o">.</span><span class="n">interface</span><span class="o">.</span><span class="n">implements</span><span class="p">(</span><span class="n">IRequestFilter</span><span class="p">,</span><span class="n">IResponseFilter</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">filterRequest</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="s">&quot;X-Wrap-Input&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;Input&quot;</span>
<span class="k">def</span> <span class="nf">filterResponse</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">response</span><span class="p">):</span>
<span class="n">response</span><span class="o">.</span><span class="n">headers</span><span class="p">[</span><span class="s">&quot;X-Wrap-Output&quot;</span><span class="p">]</span> <span class="o">=</span> <span class="s">&quot;Output&quot;</span>
</pre></div>
</div>
<p>In order to activate the filters on a RESTResource instance, you need to pass a list of them in the constructor as the <em>filters</em> parameter, e.g.:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">class</span> <span class="nc">FilterApp</span><span class="p">:</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">root</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">received_headers</span>
<span class="k">def</span> <span class="nf">run_filter_app</span><span class="p">():</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">RESTResource</span><span class="p">(</span><span class="n">services</span><span class="o">=</span><span class="p">(</span><span class="n">FilterApp</span><span class="p">(),),</span><span class="n">filters</span><span class="o">=</span><span class="p">(</span><span class="n">Change404to503Filter</span><span class="p">(),</span><span class="n">AddCustomHeaderFilter</span><span class="p">(),</span><span class="n">WrapAroundFilter</span><span class="p">(),))</span>
<span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="mi">8083</span><span class="p">)</span>
</pre></div>
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<p>By default, CorePost returns the appropriate HTTP code based on the HTTP method:</p>
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...@@ -49,9 +49,8 @@ ...@@ -49,9 +49,8 @@
<div class="section" id="corepost"> <div class="section" id="corepost">
<h1>CorePost<a class="headerlink" href="#corepost" title="Permalink to this headline"></a></h1> <h1>CorePost<a class="headerlink" href="#corepost" title="Permalink to this headline"></a></h1>
<div class="section" id="rest-micro-framework-powered-by-the-asynchronous-twisted-web-apis"> <div class="section" id="a-twisted-rest-micro-framework">
<h2>REST micro-framework, powered by the asynchronous Twisted Web APIs<a class="headerlink" href="#rest-micro-framework-powered-by-the-asynchronous-twisted-web-apis" title="Permalink to this headline"></a></h2> <h2>A Twisted REST micro-framework<a class="headerlink" href="#a-twisted-rest-micro-framework" title="Permalink to this headline"></a></h2>
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...@@ -61,38 +60,35 @@ ...@@ -61,38 +60,35 @@
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...@@ -104,12 +100,14 @@ ...@@ -104,12 +100,14 @@
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<li><a class="reference internal" href="#rest-micro-framework-powered-by-the-asynchronous-twisted-web-apis">REST micro-framework, powered by the asynchronous Twisted Web APIs</a><ul> <li><a class="reference internal" href="#a-twisted-rest-micro-framework">A Twisted REST micro-framework</a><ul>
</ul>
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<div class="section" id="modular-rest-applications">
<h1>Modular REST applications<a class="headerlink" href="#modular-rest-applications" title="Permalink to this headline"></a></h1>
<p>A typical case in REST is where you have parent/child resources (business entities), e.g.</p>
<div class="highlight-python"><pre>Customer
Customer Address
Customer Phone
Customer Order
Customer Invoice
Customer Invoice Payment</pre>
</div>
<p>etc.</p>
<p>This can create a URL structure like:</p>
<div class="highlight-python"><pre>/customer
/customer/&lt;customerId&gt;
/customer/&lt;customerId&gt;/address
/customer/&lt;customerId&gt;/address/&lt;addressId&gt;
/customer/&lt;customerId&gt;/phone
/customer/&lt;customerId&gt;/phone/&lt;phoneId&gt;
/customer/&lt;customerId&gt;/invoice
/customer/&lt;customerId&gt;/invoice/&lt;invoiceId&gt;
/customer/&lt;customerId&gt;/invoice/&lt;invoiceId&gt;/payment
/customer/&lt;customerId&gt;/invoice/&lt;invoiceId&gt;/payment/&lt;paymentId&gt;</pre>
</div>
<p>CorePost allows you to write small, modular classes that implement a REST service for just a single entity,
driven by URL paths with dynamic elements in them (e.g. the <em>customerId</em>, <em>invoiceId</em>, <em>paymentId</em> path parameters in the sample above).
You do not have to mesh all these different entities in a single class.</p>
<p>At the end, you wrap all of the different REST services in a single <em>RESTResource</em> object (which extends the regular Twisted Web Resource object)
and it takes care of routing the request to the appropriate class.</p>
<p>Here is a full-blown example of two REST services for Customer and Customer Address:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">corepost</span> <span class="kn">import</span> <span class="n">Response</span><span class="p">,</span> <span class="n">NotFoundException</span><span class="p">,</span> <span class="n">AlreadyExistsException</span>
<span class="kn">from</span> <span class="nn">corepost.web</span> <span class="kn">import</span> <span class="n">RESTResource</span><span class="p">,</span> <span class="n">route</span><span class="p">,</span> <span class="n">Http</span>
<span class="k">class</span> <span class="nc">CustomerRESTService</span><span class="p">():</span>
<span class="n">path</span> <span class="o">=</span> <span class="s">&quot;/customer&quot;</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">getAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getAllCustomers</span><span class="p">()</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;customerId&gt;&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">post</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">firstName</span><span class="p">,</span><span class="n">lastName</span><span class="p">):</span>
<span class="n">customer</span> <span class="o">=</span> <span class="n">Customer</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">firstName</span><span class="p">,</span> <span class="n">lastName</span><span class="p">)</span>
<span class="n">DB</span><span class="o">.</span><span class="n">saveCustomer</span><span class="p">(</span><span class="n">customer</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">201</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;customerId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">put</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">firstName</span><span class="p">,</span><span class="n">lastName</span><span class="p">):</span>
<span class="n">c</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="p">(</span><span class="n">c</span><span class="o">.</span><span class="n">firstName</span><span class="p">,</span><span class="n">c</span><span class="o">.</span><span class="n">lastName</span><span class="p">)</span> <span class="o">=</span> <span class="p">(</span><span class="n">firstName</span><span class="p">,</span><span class="n">lastName</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;customerId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">delete</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="n">DB</span><span class="o">.</span><span class="n">deleteCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">deleteAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">):</span>
<span class="n">DB</span><span class="o">.</span><span class="n">deleteAllCustomers</span><span class="p">()</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="k">class</span> <span class="nc">CustomerAddressRESTService</span><span class="p">():</span>
<span class="n">path</span> <span class="o">=</span> <span class="s">&quot;/customer/&lt;customerId&gt;/address&quot;</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">getAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span><span class="o">.</span><span class="n">addresses</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;addressId&gt;&quot;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">get</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">):</span>
<span class="k">return</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomerAddress</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">addressId</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">post</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">,</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">):</span>
<span class="n">c</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="n">address</span> <span class="o">=</span> <span class="n">CustomerAddress</span><span class="p">(</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">addresses</span><span class="p">[</span><span class="n">addressId</span><span class="p">]</span> <span class="o">=</span> <span class="n">address</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">201</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;addressId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">put</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">,</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">):</span>
<span class="n">address</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomerAddress</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">addressId</span><span class="p">)</span>
<span class="p">(</span><span class="n">address</span><span class="o">.</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">address</span><span class="o">.</span><span class="n">streetName</span><span class="p">,</span><span class="n">address</span><span class="o">.</span><span class="n">stateCode</span><span class="p">,</span><span class="n">address</span><span class="o">.</span><span class="n">countryCode</span><span class="p">)</span> <span class="o">=</span> <span class="p">(</span><span class="n">streetNumber</span><span class="p">,</span><span class="n">streetName</span><span class="p">,</span><span class="n">stateCode</span><span class="p">,</span><span class="n">countryCode</span><span class="p">)</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&lt;addressId&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">delete</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">,</span><span class="n">addressId</span><span class="p">):</span>
<span class="n">DB</span><span class="o">.</span><span class="n">getCustomerAddress</span><span class="p">(</span><span class="n">customerId</span><span class="p">,</span> <span class="n">addressId</span><span class="p">)</span> <span class="c">#validate address exists</span>
<span class="k">del</span><span class="p">(</span><span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span><span class="o">.</span><span class="n">addresses</span><span class="p">[</span><span class="n">addressId</span><span class="p">])</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">DELETE</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">deleteAll</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">customerId</span><span class="p">):</span>
<span class="n">c</span> <span class="o">=</span> <span class="n">DB</span><span class="o">.</span><span class="n">getCustomer</span><span class="p">(</span><span class="n">customerId</span><span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">addresses</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">return</span> <span class="n">Response</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">run_rest_app</span><span class="p">():</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">RESTResource</span><span class="p">((</span><span class="n">CustomerRESTService</span><span class="p">(),</span><span class="n">CustomerAddressRESTService</span><span class="p">()))</span>
<span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">(</span><span class="mi">8080</span><span class="p">)</span>
<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&quot;__main__&quot;</span><span class="p">:</span>
<span class="n">run_rest_app</span><span class="p">()</span>
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<div class="section" id="url-routing">
<h1>URL Routing<a class="headerlink" href="#url-routing" title="Permalink to this headline"></a></h1>
<div class="section" id="route-decorator">
<h2>&#64;route decorator<a class="headerlink" href="#route-decorator" title="Permalink to this headline"></a></h2>
<p>Via a simple <em>&#64;route</em> decorator you can automatically route <em>twisted.web</em> Request objects to your class method
based on URL (with dynamic paths), HTTP method, expected content type, etc:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">corepost.web</span> <span class="kn">import</span> <span class="n">route</span><span class="p">,</span> <span class="n">RESTResource</span>
<span class="kn">from</span> <span class="nn">corepost.enums</span> <span class="kn">import</span> <span class="n">Http</span>
<span class="k">class</span> <span class="nc">RESTService</span><span class="p">():</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">root</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">path</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/test&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">path</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/test/&lt;int:numericid&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_get_resources</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">numericid</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="s">&quot;</span><span class="si">%s</span><span class="s">&quot;</span> <span class="o">%</span> <span class="n">numericid</span>
<span class="k">if</span> <span class="n">__name__</span> <span class="o">==</span> <span class="s">&#39;__main__&#39;</span><span class="p">:</span>
<span class="n">app</span> <span class="o">=</span> <span class="n">RESTResource</span><span class="p">((</span><span class="n">RESTService</span><span class="p">,))</span>
<span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">()</span>
</pre></div>
</div>
<p><em>Note</em>:</p>
<blockquote>
<div><p>This piece of code:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="n">app</span><span class="o">.</span><span class="n">run</span><span class="p">()</span>
</pre></div>
</div>
<p>is just for convenience when showing code samples and writing unit tests.
In a real production application you would use existing Twisted <em>twistd</em> functionality:</p>
<ul class="simple">
<li><a class="reference external" href="http://twistedmatrix.com/documents/current/core/howto/basics.html">http://twistedmatrix.com/documents/current/core/howto/basics.html</a></li>
<li><a class="reference external" href="http://twistedmatrix.com/documents/current/core/howto/application.html">http://twistedmatrix.com/documents/current/core/howto/application.html</a></li>
<li><a class="reference external" href="http://twistedmatrix.com/documents/current/core/howto/tap.html">http://twistedmatrix.com/documents/current/core/howto/tap.html</a></li>
</ul>
</div></blockquote>
</div>
<div class="section" id="path-argument-extraction">
<h2>Path argument extraction<a class="headerlink" href="#path-argument-extraction" title="Permalink to this headline"></a></h2>
<p>CorePort can easily extract path arguments from an URL and convert them to the desired type.</p>
<p>The supported types are:</p>
<ul class="simple">
<li><em>int</em></li>
<li><em>float</em></li>
<li><em>string</em></li>
</ul>
<p>Example:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/int/&lt;int:intarg&gt;/float/&lt;float:floatarg&gt;/string/&lt;stringarg&gt;&quot;</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">GET</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="n">intarg</span><span class="p">,</span><span class="n">floatarg</span><span class="p">,</span><span class="n">stringarg</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">pass</span>
</pre></div>
</div>
</div>
<div class="section" id="routing-requests-by-incoming-content-type">
<h2>Routing requests by incoming content type<a class="headerlink" href="#routing-requests-by-incoming-content-type" title="Permalink to this headline"></a></h2>
<p>Based on the incoming content type in POST/PUT requests, the <em>same</em> URL can be hooked up to different router methods:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">),</span><span class="n">MediaType</span><span class="o">.</span><span class="n">APPLICATION_JSON</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_content_app_json</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="n">HttpHeader</span><span class="o">.</span><span class="n">CONTENT_TYPE</span><span class="p">]</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">),(</span><span class="n">MediaType</span><span class="o">.</span><span class="n">TEXT_XML</span><span class="p">,</span><span class="n">MediaType</span><span class="o">.</span><span class="n">APPLICATION_XML</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_content_xml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="n">HttpHeader</span><span class="o">.</span><span class="n">CONTENT_TYPE</span><span class="p">]</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">),</span><span class="n">MediaType</span><span class="o">.</span><span class="n">TEXT_YAML</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">test_content_yaml</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">request</span><span class="o">.</span><span class="n">received_headers</span><span class="p">[</span><span class="n">HttpHeader</span><span class="o">.</span><span class="n">CONTENT_TYPE</span><span class="p">]</span>
<span class="nd">@route</span><span class="p">(</span><span class="s">&quot;/post/by/content&quot;</span><span class="p">,(</span><span class="n">Http</span><span class="o">.</span><span class="n">POST</span><span class="p">,</span><span class="n">Http</span><span class="o">.</span><span class="n">PUT</span><span class="p">))</span>
<span class="k">def</span> <span class="nf">test_content_catch_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span><span class="n">request</span><span class="p">,</span><span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span> <span class="n">MediaType</span><span class="o">.</span><span class="n">WILDCARD</span>
</pre></div>
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