bringing docs up to date

_sources/arguments.txt

+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
+
+

_sources/async.txt

+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.
+	

_sources/content_types.txt

+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} 
+	

_sources/filters.txt

+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)
+

_sources/http_codes.txt

+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
+	

_sources/index.txt

+CorePost
+====================================
+
+A Twisted REST micro-framework
+------------------------------
+
+.. toctree::
+   :maxdepth: 4
+   
+   intro
+   
+Features
+--------
+
+.. toctree::
+   :maxdepth: 4
+   
+   url_routing
+   argument_parsing
+   arguments
+   content_types
+   filters
+   http_codes
+   async
+   modules
+   

_sources/intro.txt

+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

_sources/modules.txt

+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()
+	

_sources/url_routing.txt

+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

_static/basic.css

+/*
+ * basic.css
+ * ~~~~~~~~~
+ *
+ * Sphinx stylesheet -- basic theme.
+ *
+ * :copyright: Copyright 2007-2011 by the Sphinx team, see AUTHORS.
+ * :license: BSD, see LICENSE for details.
+ *
+ */
+
+/* -- main layout ----------------------------------------------------------- */
+
+div.clearer {
+    clear: both;
+}
+
+/* -- relbar ---------------------------------------------------------------- */
+
+div.related {
+    width: 100%;
+    font-size: 90%;
+}
+
+div.related h3 {
+    display: none;
+}
+
+div.related ul {
+    margin: 0;
+    padding: 0 0 0 10px;
+    list-style: none;
+}
+
+div.related li {
+    display: inline;
+}
+
+div.related li.right {
+    float: right;
+    margin-right: 5px;
+}
+
+/* -- sidebar --------------------------------------------------------------- */
+
+div.sphinxsidebarwrapper {
+    padding: 10px 5px 0 10px;
+}
+
+div.sphinxsidebar {
+    float: left;
+    width: 230px;
+    margin-left: -100%;
+    font-size: 90%;
+}
+
+div.sphinxsidebar ul {
+    list-style: none;
+}
+
+div.sphinxsidebar ul ul,
+div.sphinxsidebar ul.want-points {
+    margin-left: 20px;
+    list-style: square;
+}
+
+div.sphinxsidebar ul ul {
+    margin-top: 0;
+    margin-bottom: 0;
+}
+
+div.sphinxsidebar form {
+    margin-top: 10px;
+}
+
+div.sphinxsidebar input {
+    border: 1px solid #98dbcc;
+    font-family: sans-serif;
+    font-size: 1em;
+}
+
+div.sphinxsidebar input[type="text"] {
+    width: 170px;
+}
+
+div.sphinxsidebar input[type="submit"] {
+    width: 30px;
+}
+
+img {
+    border: 0;
+}
+
+/* -- search page ----------------------------------------------------------- */
+
+ul.search {
+    margin: 10px 0 0 20px;
+    padding: 0;
+}
+
+ul.search li {
+    padding: 5px 0 5px 20px;
+    background-image: url(file.png);
+    background-repeat: no-repeat;
+    background-position: 0 7px;
+}
+
+ul.search li a {
+    font-weight: bold;
+}
+
+ul.search li div.context {
+    color: #888;
+    margin: 2px 0 0 30px;
+    text-align: left;
+}
+
+ul.keywordmatches li.goodmatch a {
+    font-weight: bold;
+}
+
+/* -- index page ------------------------------------------------------------ */
+
+table.contentstable {
+    width: 90%;
+}
+
+table.contentstable p.biglink {
+    line-height: 150%;
+}
+
+a.biglink {
+    font-size: 1.3em;
+}
+
+span.linkdescr {
+    font-style: italic;
+    padding-top: 5px;
+    font-size: 90%;
+}
+
+/* -- general index --------------------------------------------------------- */
+
+table.indextable {
+    width: 100%;
+}
+
+table.indextable td {
+    text-align: left;
+    vertical-align: top;
+}
+
+table.indextable dl, table.indextable dd {
+    margin-top: 0;
+    margin-bottom: 0;
+}
+
+table.indextable tr.pcap {
+    height: 10px;
+}
+
+table.indextable tr.cap {
+    margin-top: 10px;
+    background-color: #f2f2f2;
+}
+
+img.toggler {
+    margin-right: 3px;
+    margin-top: 3px;
+    cursor: pointer;
+}
+
+div.modindex-jumpbox {
+    border-top: 1px solid #ddd;
+    border-bottom: 1px solid #ddd;
+    margin: 1em 0 1em 0;
+    padding: 0.4em;
+}
+
+div.genindex-jumpbox {
+    border-top: 1px solid #ddd;
+    border-bottom: 1px solid #ddd;
+    margin: 1em 0 1em 0;
+    padding: 0.4em;
+}
+
+/* -- general body styles --------------------------------------------------- */
+
+a.headerlink {
+    visibility: hidden;
+}
+
+h1:hover > a.headerlink,
+h2:hover > a.headerlink,
+h3:hover > a.headerlink,
+h4:hover > a.headerlink,
+h5:hover > a.headerlink,
+h6:hover > a.headerlink,
+dt:hover > a.headerlink {
+    visibility: visible;
+}
+
+div.body p.caption {
+    text-align: inherit;
+}
+
+div.body td {
+    text-align: left;
+}
+
+.field-list ul {
+    padding-left: 1em;
+}
+
+.first {
+    margin-top: 0 !important;
+}
+
+p.rubric {
+    margin-top: 30px;
+    font-weight: bold;
+}
+
+img.align-left, .figure.align-left, object.align-left {
+    clear: left;
+    float: left;
+    margin-right: 1em;
+}
+
+img.align-right, .figure.align-right, object.align-right {
+    clear: right;
+    float: right;
+    margin-left: 1em;
+}
+
+img.align-center, .figure.align-center, object.align-center {
+  display: block;
+  margin-left: auto;
+  margin-right: auto;
+}
+
+.align-left {
+    text-align: left;
+}
+
+.align-center {
+    text-align: center;
+}
+
+.align-right {
+    text-align: right;
+}
+
+/* -- sidebars -------------------------------------------------------------- */
+
+div.sidebar {
+    margin: 0 0 0.5em 1em;
+    border: 1px solid #ddb;
+    padding: 7px 7px 0 7px;
+    background-color: #ffe;
+    width: 40%;
+    float: right;
+}
+
+p.sidebar-title {
+    font-weight: bold;
+}
+
+/* -- topics ---------------------------------------------------------------- */
+
+div.topic {
+    border: 1px solid #ccc;
+    padding: 7px 7px 0 7px;
+    margin: 10px 0 10px 0;
+}
+
+p.topic-title {
+    font-size: 1.1em;
+    font-weight: bold;
+    margin-top: 10px;
+}
+
+/* -- admonitions ----------------------------------------------------------- */
+
+div.admonition {
+    margin-top: 10px;
+    margin-bottom: 10px;
+    padding: 7px;
+}
+
+div.admonition dt {
+    font-weight: bold;
+}
+
+div.admonition dl {
+    margin-bottom: 0;
+}
+
+p.admonition-title {
+    margin: 0px 10px 5px 0px;
+    font-weight: bold;
+}
+
+div.body p.centered {
+    text-align: center;
+    margin-top: 25px;
+}
+
+/* -- tables ---------------------------------------------------------------- */
+
+table.docutils {
+    border: 0;
+    border-collapse: collapse;
+}
+
+table.docutils td, table.docutils th {
+    padding: 1px 8px 1px 5px;
+    border-top: 0;
+    border-left: 0;
+    border-right: 0;
+    border-bottom: 1px solid #aaa;
+}
+
+table.field-list td, table.field-list th {
+    border: 0 !important;
+}
+
+table.footnote td, table.footnote th {
+    border: 0 !important;
+}
+
+th {
+    text-align: left;
+    padding-right: 5px;
+}
+
+table.citation {
+    border-left: solid 1px gray;
+    margin-left: 1px;
+}
+
+table.citation td {
+    border-bottom: none;
+}
+
+/* -- other body styles ----------------------------------------------------- */
+
+ol.arabic {
+    list-style: decimal;
+}
+
+ol.loweralpha {
+    list-style: lower-alpha;
+}
+
+ol.upperalpha {
+    list-style: upper-alpha;
+}
+
+ol.lowerroman {
+    list-style: lower-roman;
+}
+
+ol.upperroman {
+    list-style: upper-roman;
+}
+
+dl {
+    margin-bottom: 15px;
+}
+
+dd p {
+    margin-top: 0px;
+}
+
+dd ul, dd table {
+    margin-bottom: 10px;
+}
+
+dd {
+    margin-top: 3px;
+    margin-bottom: 10px;
+    margin-left: 30px;
+}
+
+dt:target, .highlighted {
+    background-color: #fbe54e;
+}
+
+dl.glossary dt {
+    font-weight: bold;
+    font-size: 1.1em;
+}
+
+.field-list ul {
+    margin: 0;
+    padding-left: 1em;
+}
+
+.field-list p {
+    margin: 0;
+}
+
+.refcount {
+    color: #060;
+}
+
+.optional {
+    font-size: 1.3em;
+}
+
+.versionmodified {
+    font-style: italic;
+}
+
+.system-message {
+    background-color: #fda;
+    padding: 5px;
+    border: 3px solid red;
+}
+
+.footnote:target  {
+    background-color: #ffa;
+}
+
+.line-block {
+    display: block;
+    margin-top: 1em;
+    margin-bottom: 1em;
+}
+
+.line-block .line-block {
+    margin-top: 0;
+    margin-bottom: 0;
+    margin-left: 1.5em;
+}
+
+.guilabel, .menuselection {
+    font-family: sans-serif;
+}
+
+.accelerator {
+    text-decoration: underline;
+}
+
+.classifier {
+    font-style: oblique;
+}
+
+abbr, acronym {
+    border-bottom: dotted 1px;
+    cursor: help;
+}
+
+/* -- code displays --------------------------------------------------------- */
+
+pre {
+    overflow: auto;
+    overflow-y: hidden;  /* fixes display issues on Chrome browsers */
+}
+
+td.linenos pre {
+    padding: 5px 0px;
+    border: 0;
+    background-color: transparent;
+    color: #aaa;
+}
+
+table.highlighttable {
+    margin-left: 0.5em;
+}
+
+table.highlighttable td {
+    padding: 0 0.5em 0 0.5em;
+}
+
+tt.descname {
+    background-color: transparent;
+    font-weight: bold;
+    font-size: 1.2em;
+}
+
+tt.descclassname {
+    background-color: transparent;
+}
+
+tt.xref, a tt {
+    background-color: transparent;
+    font-weight: bold;
+}
+
+h1 tt, h2 tt, h3 tt, h4 tt, h5 tt, h6 tt {
+    background-color: transparent;
+}
+
+.viewcode-link {
+    float: right;
+}
+
+.viewcode-back {
+    float: right;
+    font-family: sans-serif;
+}
+
+div.viewcode-block:target {
+    margin: -1px -10px;
+    padding: 0 10px;
+}
+
+/* -- math display ---------------------------------------------------------- */
+
+img.math {
+    vertical-align: middle;
+}
+
+div.body div.math p {
+    text-align: center;
+}
+
+span.eqno {
+    float: right;
+}
+
+/* -- printout stylesheet --------------------------------------------------- */
+
+@media print {
+    div.document,
+    div.documentwrapper,
+    div.bodywrapper {
+        margin: 0 !important;
+        width: 100%;
+    }
+
+    div.sphinxsidebar,
+    div.related,
+    div.footer,
+    #top-link {
+        display: none;
+    }
+}
\ No newline at end of file

_static/default.css

+/*
+ * default.css_t
+ * ~~~~~~~~~~~~~
+ *
+ * Sphinx stylesheet -- default theme.
+ *
+ * :copyright: Copyright 2007-2011 by the Sphinx team, see AUTHORS.
+ * :license: BSD, see LICENSE for details.
+ *
+ */
+
+@import url("basic.css");
+
+/* -- page layout ----------------------------------------------------------- */
+
+body {
+    font-family: sans-serif;
+    font-size: 100%;
+    background-color: #11303d;
+    color: #000;
+    margin: 0;
+    padding: 0;
+}
+
+div.document {
+    background-color: #1c4e63;
+}
+
+div.documentwrapper {
+    float: left;
+    width: 100%;
+}
+
+div.bodywrapper {
+    margin: 0 0 0 230px;
+}
+
+div.body {
+    background-color: #ffffff;
+    color: #000000;
+    padding: 0 20px 30px 20px;
+}
+
+div.footer {
+    color: #ffffff;
+    width: 100%;
+    padding: 9px 0 9px 0;
+    text-align: center;
+    font-size: 75%;
+}
+
+div.footer a {
+    color: #ffffff;
+    text-decoration: underline;
+}
+
+div.related {
+    background-color: #133f52;
+    line-height: 30px;
+    color: #ffffff;
+}
+
+div.related a {
+    color: #ffffff;
+}
+
+div.sphinxsidebar {
+}
+
+div.sphinxsidebar h3 {
+    font-family: 'Trebuchet MS', sans-serif;
+    color: #ffffff;
+    font-size: 1.4em;
+    font-weight: normal;
+    margin: 0;
+    padding: 0;
+}
+
+div.sphinxsidebar h3 a {
+    color: #ffffff;
+}
+
+div.sphinxsidebar h4 {
+    font-family: 'Trebuchet MS', sans-serif;
+    color: #ffffff;
+    font-size: 1.3em;
+    font-weight: normal;
+    margin: 5px 0 0 0;
+    padding: 0;
+}
+
+div.sphinxsidebar p {
+    color: #ffffff;
+}
+
+div.sphinxsidebar p.topless {
+    margin: 5px 10px 10px 10px;
+}
+
+div.sphinxsidebar ul {
+    margin: 10px;
+    padding: 0;
+    color: #ffffff;
+}
+
+div.sphinxsidebar a {
+    color: #98dbcc;
+}
+
+div.sphinxsidebar input {
+    border: 1px solid #98dbcc;
+    font-family: sans-serif;
+    font-size: 1em;
+}
+
+
+
+/* -- hyperlink styles ------------------------------------------------------ */
+
+a {
+    color: #355f7c;
+    text-decoration: none;
+}
+
+a:visited {
+    color: #355f7c;
+    text-decoration: none;
+}
+
+a:hover {
+    text-decoration: underline;
+}
+
+
+
+/* -- body styles ----------------------------------------------------------- */
+
+div.body h1,
+div.body h2,
+div.body h3,
+div.body h4,
+div.body h5,
+div.body h6 {
+    font-family: 'Trebuchet MS', sans-serif;
+    background-color: #f2f2f2;
+    font-weight: normal;
+    color: #20435c;
+    border-bottom: 1px solid #ccc;
+    margin: 20px -20px 10px -20px;
+    padding: 3px 0 3px 10px;
+}
+
+div.body h1 { margin-top: 0; font-size: 200%; }
+div.body h2 { font-size: 160%; }
+div.body h3 { font-size: 140%; }
+div.body h4 { font-size: 120%; }
+div.body h5 { font-size: 110%; }
+div.body h6 { font-size: 100%; }
+
+a.headerlink {
+    color: #c60f0f;
+    font-size: 0.8em;
+    padding: 0 4px 0 4px;
+    text-decoration: none;
+}
+
+a.headerlink:hover {
+    background-color: #c60f0f;
+    color: white;
+}
+
+div.body p, div.body dd, div.body li {
+    text-align: justify;
+    line-height: 130%;
+}
+
+div.admonition p.admonition-title + p {
+    display: inline;
+}
+
+div.admonition p {
+    margin-bottom: 5px;
+}
+
+div.admonition pre {
+    margin-bottom: 5px;
+}
+
+div.admonition ul, div.admonition ol {
+    margin-bottom: 5px;
+}
+
+div.note {
+    background-color: #eee;
+    border: 1px solid #ccc;
+}
+
+div.seealso {
+    background-color: #ffc;
+    border: 1px solid #ff6;
+}
+
+div.topic {
+    background-color: #eee;
+}
+
+div.warning {
+    background-color: #ffe4e4;
+    border: 1px solid #f66;
+}
+
+p.admonition-title {
+    display: inline;
+}
+
+p.admonition-title:after {
+    content: ":";
+}
+
+pre {
+    padding: 5px;
+    background-color: #eeffcc;
+    color: #333333;
+    line-height: 120%;
+    border: 1px solid #ac9;
+    border-left: none;
+    border-right: none;
+}
+
+tt {
+    background-color: #ecf0f3;
+    padding: 0 1px 0 1px;
+    font-size: 0.95em;
+}
+
+th {
+    background-color: #ede;
+}
+
+.warning tt {
+    background: #efc2c2;
+}
+
+.note tt {
+    background: #d6d6d6;
+}
+
+.viewcode-back {
+    font-family: sans-serif;
+}
+
+div.viewcode-block:target {
+    background-color: #f4debf;
+    border-top: 1px solid #ac9;
+    border-bottom: 1px solid #ac9;
+}
\ No newline at end of file

_static/doctools.js

+/*
+ * 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
+ * an installed firebug like debugger
+if (!window.console || !console.firebug) {
+  var names = ["log", "debug", "info", "warn", "error", "assert", "dir",
+    "dirxml", "group", "groupEnd", "time", "timeEnd", "count", "trace",
+    "profile", "profileEnd"];
+  window.console = {};
+  for (var i = 0; i < names.length; ++i)
+    window.console[names[i]] = function() {};
+}
+ */
+
+/**
+ * small helper function to urldecode strings
+ */
+jQuery.urldecode = function(x) {
+  return decodeURIComponent(x).replace(/\+/g, ' ');
+}
+
+/**
+ * small helper function to urlencode strings
+ */
+jQuery.urlencode = encodeURIComponent;
+
+/**
+ * This function returns the parsed url parameters of the
+ * current request. Multiple values per key are supported,
+ * it will always return arrays of strings for the value parts.
+ */
+jQuery.getQueryParameters = function(s) {
+  if (typeof s == 'undefined')
+    s = document.location.search;
+  var parts = s.substr(s.indexOf('?') + 1).split('&');
+  var result = {};
+  for (var i = 0; i < parts.length; i++) {
+    var tmp = parts[i].split('=', 2);
+    var key = jQuery.urldecode(tmp[0]);
+    var value = jQuery.urldecode(tmp[1]);
+    if (key in result)
+      result[key].push(value);
+    else
+      result[key] = [value];
+  }
+  return result;
+};
+
+/**
+ * small function to check if an array contains
+ * a given item.
+ */
+jQuery.contains = function(arr, item) {
+  for (var i = 0; i < arr.length; i++) {
+    if (arr[i] == item)
+      return true;
+  }
+  return false;
+};
+
+/**
+ * highlight a given string on a jquery object by wrapping it in
+ * span elements with the given class name.
+ */
+jQuery.fn.highlightText = function(text, className) {
+  function highlight(node) {
+    if (node.nodeType == 3) {
+      var val = node.nodeValue;
+      var pos = val.toLowerCase().indexOf(text);
+      if (pos >= 0 && !jQuery(node.parentNode).hasClass(className)) {
+        var span = document.createElement("span");
+        span.className = className;
+        span.appendChild(document.createTextNode(val.substr(pos, text.length)));
+        node.parentNode.insertBefore(span, node.parentNode.insertBefore(
+          document.createTextNode(val.substr(pos + text.length)),
+          node.nextSibling));
+        node.nodeValue = val.substr(0, pos);
+      }
+    }
+    else if (!jQuery(node).is("button, select, textarea")) {
+      jQuery.each(node.childNodes, function() {
+        highlight(this);
+      });
+    }
+  }
+  return this.each(function() {
+    highlight(this);
+  });
+};
+
+/**
+ * Small JavaScript module for the documentation.
+ */
+var Documentation = {
+
+  init : function() {
+    this.fixFirefoxAnchorBug();
+    this.highlightSearchWords();
+    this.initIndexTable();
+  },
+
+  /**
+   * i18n support
+   */
+  TRANSLATIONS : {},
+  PLURAL_EXPR : function(n) { return n == 1 ? 0 : 1; },
+  LOCALE : 'unknown',
+
+  // gettext and ngettext don't access this so that the functions
+  // can safely bound to a different name (_ = Documentation.gettext)
+  gettext : function(string) {
+    var translated = Documentation.TRANSLATIONS[string];
+    if (typeof translated == 'undefined')
+      return string;
+    return (typeof translated == 'string') ? translated : translated[0];
+  },
+
+  ngettext : function(singular, plural, n) {
+    var translated = Documentation.TRANSLATIONS[singular];
+    if (typeof translated == 'undefined')
+      return (n == 1) ? singular : plural;
+    return translated[Documentation.PLURALEXPR(n)];
+  },
+
+  addTranslations : function(catalog) {
+    for (var key in catalog.messages)
+      this.TRANSLATIONS[key] = catalog.messages[key];
+    this.PLURAL_EXPR = new Function('n', 'return +(' + catalog.plural_expr + ')');
+    this.LOCALE = catalog.locale;
+  },
+
+  /**
+   * add context elements like header anchor links
+   */
+  addContextElements : function() {
+    $('div[id] > :header:first').each(function() {
+      $('<a class="headerlink">\u00B6</a>').
+      attr('href', '#' + this.id).
+      attr('title', _('Permalink to this headline')).
+      appendTo(this);
+    });
+    $('dt[id]').each(function() {
+      $('<a class="headerlink">\u00B6</a>').
+      attr('href', '#' + this.id).
+      attr('title', _('Permalink to this definition')).
+      appendTo(this);
+    });
+  },
+
+  /**
+   * workaround a firefox stupidity
+   */
+  fixFirefoxAnchorBug : function() {
+    if (document.location.hash && $.browser.mozilla)
+      window.setTimeout(function() {
+        document.location.href += '';
+      }, 10);
+  },
+
+  /**
+   * highlight the search words provided in the url in the text
+   */
+  highlightSearchWords : function() {
+    var params = $.getQueryParameters();
+    var terms = (params.highlight) ? params.highlight[0].split(/\s+/) : [];
+    if (terms.length) {
+      var body = $('div.body');
+      window.setTimeout(function() {
+        $.each(terms, function() {
+          body.highlightText(this.toLowerCase(), 'highlighted');
+        });
+      }, 10);
+      $('<p class="highlight-link"><a href="javascript:Documentation.' +
+        'hideSearchWords()">' + _('Hide Search Matches') + '</a></p>')
+          .appendTo($('#searchbox'));
+    }
+  },
+
+  /**
+   * init the domain index toggle buttons
+   */
+  initIndexTable : function() {
+    var togglers = $('img.toggler').click(function() {
+      var src = $(this).attr('src');
+      var idnum = $(this).attr('id').substr(7);
+      $('tr.cg-' + idnum).toggle();
+      if (src.substr(-9) == 'minus.png')
+        $(this).attr('src', src.substr(0, src.length-9) + 'plus.png');
+      else
+        $(this).attr('src', src.substr(0, src.length-8) + 'minus.png');
+    }).css('display', '');
+    if (DOCUMENTATION_OPTIONS.COLLAPSE_INDEX) {
+        togglers.click();
+    }
+  },
+
+  /**
+   * helper function to hide the search marks again
+   */
+  hideSearchWords : function() {
+    $('#searchbox .highlight-link').fadeOut(300);
+    $('span.highlighted').removeClass('highlighted');
+  },
+
+  /**
+   * make the url absolute
+   */
+  makeURL : function(relativeURL) {
+    return DOCUMENTATION_OPTIONS.URL_ROOT + '/' + relativeURL;
+  },
+
+  /**
+   * get the current relative url
+   */
+  getCurrentURL : function() {
+    var path = document.location.pathname;
+    var parts = path.split(/\//);
+    $.each(DOCUMENTATION_OPTIONS.URL_ROOT.split(/\//), function() {
+      if (this == '..')
+        parts.pop();
+    });
+    var url = parts.join('/');
+    return path.substring(url.lastIndexOf('/') + 1, path.length - 1);
+  }
+};
+
+// quick alias for translations
+_ = Documentation.gettext;
+
+$(document).ready(function() {
+  Documentation.init();
+});

_static/pygments.css

+.highlight .hll { background-color: #ffffcc }
+.highlight  { background: #eeffcc; }
+.highlight .c { color: #408090; font-style: italic } /* Comment */
+.highlight .err { border: 1px solid #FF0000 } /* Error */
+.highlight .k { color: #007020; font-weight: bold } /* Keyword */
+.highlight .o { color: #666666 } /* Operator */
+.highlight .cm { color: #408090; font-style: italic } /* Comment.Multiline */
+.highlight .cp { color: #007020 } /* Comment.Preproc */
+.highlight .c1 { color: #408090; font-style: italic } /* Comment.Single */
+.highlight .cs { color: #408090; background-color: #fff0f0 } /* Comment.Special */
+.highlight .gd { color: #A00000 } /* Generic.Deleted */
+.highlight .ge { font-style: italic } /* Generic.Emph */
+.highlight .gr { color: #FF0000 } /* Generic.Error */
+.highlight .gh { color: #000080; font-weight: bold } /* Generic.Heading */
+.highlight .gi { color: #00A000 } /* Generic.Inserted */
+.highlight .go { color: #303030 } /* Generic.Output */
+.highlight .gp { color: #c65d09; font-weight: bold } /* Generic.Prompt */
+.highlight .gs { font-weight: bold } /* Generic.Strong */
+.highlight .gu { color: #800080; font-weight: bold } /* Generic.Subheading */
+.highlight .gt { color: #0040D0 } /* Generic.Traceback */
+.highlight .kc { color: #007020; font-weight: bold } /* Keyword.Constant */
+.highlight .kd { color: #007020; font-weight: bold } /* Keyword.Declaration */
+.highlight .kn { color: #007020; font-weight: bold } /* Keyword.Namespace */
+.highlight .kp { color: #007020 } /* Keyword.Pseudo */
+.highlight .kr { color: #007020; font-weight: bold } /* Keyword.Reserved */
+.highlight .kt { color: #902000 } /* Keyword.Type */
+.highlight .m { color: #208050 } /* Literal.Number */
+.highlight .s { color: #4070a0 } /* Literal.String */
+.highlight .na { color: #4070a0 } /* Name.Attribute */
+.highlight .nb { color: #007020 } /* Name.Builtin */
+.highlight .nc { color: #0e84b5; font-weight: bold } /* Name.Class */
+.highlight .no { color: #60add5 } /* Name.Constant */
+.highlight .nd { color: #555555; font-weight: bold } /* Name.Decorator */
+.highlight .ni { color: #d55537; font-weight: bold } /* Name.Entity */
+.highlight .ne { color: #007020 } /* Name.Exception */
+.highlight .nf { color: #06287e } /* Name.Function */
+.highlight .nl { color: #002070; font-weight: bold } /* Name.Label */
+.highlight .nn { color: #0e84b5; font-weight: bold } /* Name.Namespace */
+.highlight .nt { color: #062873; font-weight: bold } /* Name.Tag */
+.highlight .nv { color: #bb60d5 } /* Name.Variable */
+.highlight .ow { color: #007020; font-weight: bold } /* Operator.Word */
+.highlight .w { color: #bbbbbb } /* Text.Whitespace */
+.highlight .mf { color: #208050 } /* Literal.Number.Float */
+.highlight .mh { color: #208050 } /* Literal.Number.Hex */
+.highlight .mi { color: #208050 } /* Literal.Number.Integer */
+.highlight .mo { color: #208050 } /* Literal.Number.Oct */
+.highlight .sb { color: #4070a0 } /* Literal.String.Backtick */
+.highlight .sc { color: #4070a0 } /* Literal.String.Char */
+.highlight .sd { color: #4070a0; font-style: italic } /* Literal.String.Doc */
+.highlight .s2 { color: #4070a0 } /* Literal.String.Double */
+.highlight .se { color: #4070a0; font-weight: bold } /* Literal.String.Escape */
+.highlight .sh { color: #4070a0 } /* Literal.String.Heredoc */
+.highlight .si { color: #70a0d0; font-style: italic } /* Literal.String.Interpol */
+.highlight .sx { color: #c65d09 } /* Literal.String.Other */
+.highlight .sr { color: #235388 } /* Literal.String.Regex */
+.highlight .s1 { color: #4070a0 } /* Literal.String.Single */
+.highlight .ss { color: #517918 } /* Literal.String.Symbol */
+.highlight .bp { color: #007020 } /* Name.Builtin.Pseudo */
+.highlight .vc { color: #bb60d5 } /* Name.Variable.Class */
+.highlight .vg { color: #bb60d5 } /* Name.Variable.Global */
+.highlight .vi { color: #bb60d5 } /* Name.Variable.Instance */
+.highlight .il { color: #208050 } /* Literal.Number.Integer.Long */
\ No newline at end of file

_static/sidebar.js

+/*
+ * 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({
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+    sidebarbutton.attr('title', _('Collapse sidebar'));
+    document.cookie = 'sidebar=expanded';
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+    else
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+    sidebarbutton.find('span').css({
+        'display': 'block',
+        'margin-top': (viewport_height - sidebar.position().top - 20) / 2
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+    sidebarbutton.css({
+        'color': '#FFFFFF',
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+        'padding-top': '1px',
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+    sidebarbutton.hover(
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+      }
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+  }
+
+  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();
+});

_static/underscore.js

+// 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,
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arguments.html

+
+
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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+    <title>Argument validation &mdash; CorePost 0.0.14 documentation</title>
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+        <li><a href="index.html">CorePost 0.0.14 documentation</a> &raquo;</li> 
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+          <div class="body">
+            
+  <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>
+</div>
+
+
+          </div>
+        </div>
+      </div>
+      <div class="sphinxsidebar">
+        <div class="sphinxsidebarwrapper">
+  <h4>Previous topic</h4>
+  <p class="topless"><a href="argument_parsing.html"
+                        title="previous chapter">Argument parsing</a></p>
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+  <p class="topless"><a href="content_types.html"
+                        title="next chapter">Content types</a></p>
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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>
+</div>
+<p>This is standard Twisted functionality.</p>
+</div>
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+
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+  <ul>
+<li><a class="reference internal" href="#">Asynchronous Operations</a><ul>
+<li><a class="reference internal" href="#defer-inlinecallbacks-support">&#64;defer.inlineCallbacks support</a></li>
+</ul>
+</li>
+</ul>
+
+  <h4>Previous topic</h4>
+  <p class="topless"><a href="http_codes.html"
+                        title="previous chapter">HTTP codes</a></p>
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+                        title="next chapter">Modular REST applications</a></p>
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