ability to parse JSON documents for method arguments

corepost/routing.py

@@ -248,26 +248,15 @@ class RequestRouter:
             #actual call
             if urlRouterInstance != None and pathargs != None:
                 allargs = copy.deepcopy(pathargs)
-                # handler for weird Twisted logic where PUT does not get form params
-                # see: http://twistedmatrix.com/pipermail/twisted-web/2007-March/003338.html
-                requestargs = request.args
-                if request.method == Http.PUT and HttpHeader.CONTENT_TYPE in request.received_headers.keys() \
-                    and request.received_headers[HttpHeader.CONTENT_TYPE] == MediaType.APPLICATION_FORM_URLENCODED:
-                    requestargs = parse_qs(request.content.read(), 1)
-    
-                #merge form args
-                for arg in requestargs.keys():
-                    # maintain first instance of an argument always
-                    if arg not in allargs:
-                        allargs[arg] = requestargs[arg][0]
                 
                 try:
-                    # if POST/PUT, check if we need to automatically parse JSON
+                    # if POST/PUT, check if we need to automatically parse JSON, YAML, XML
                     self.__parseRequestData(request)
+                    # parse request arguments from form or JSON docss
+                    self.__addRequestArguments(request, allargs)
                     urlRouter = urlRouterInstance.urlRouter
                     val = urlRouter.call(urlRouterInstance.clazz,request,**allargs)
                  
-                 
                     #handle Deferreds natively
                     if isinstance(val,defer.Deferred):
                         # add callback to finish the request
@@ -385,6 +374,27 @@ class RequestRouter:
                     request.yaml = yaml.safe_load(request.content.read())
                 except Exception as ex:
                     raise TypeError("Unable to parse YAML body: %s" % ex)
+
+    def __addRequestArguments(self,request,allargs):
+        """Parses the request form arguments OR JSON document root elements to build the list of arguments to a method"""
+        # handler for weird Twisted logic where PUT does not get form params
+        # see: http://twistedmatrix.com/pipermail/twisted-web/2007-March/003338.html
+        requestargs = request.args
+        if request.method == Http.PUT and HttpHeader.CONTENT_TYPE in request.received_headers.keys() \
+            and request.received_headers[HttpHeader.CONTENT_TYPE] == MediaType.APPLICATION_FORM_URLENCODED:
+            requestargs = parse_qs(request.content.read(), 1)
+        
+        #merge form args
+        for arg in requestargs.keys():
+            # maintain first instance of an argument always
+            if arg not in allargs:
+                allargs[arg] = requestargs[arg][0]
+            
+        # if JSON parse root elements instead of form elements   
+        if hasattr(request,'json'):
+            for key in request.json.keys():
+                if key not in allargs:
+                    allargs[key] = request.json[key]
     
     def __filterRequests(self,request):
         """Filters incoming requests"""

corepost/test/arguments.py

@@ -6,6 +6,8 @@ Argument extraction tests
 from corepost.web import RESTResource, validate, route
 from corepost.enums import Http
 from formencode import Schema, validators
+from twisted.python import log
+import os
 
 class TestSchema(Schema):
     allow_extra_fields = True
@@ -28,6 +30,11 @@ class ArgumentApp():
     def postValidateCustom(self,request,rootId,childId,**kwargs):
         return "%s - %s - %s" % (rootId,childId,kwargs)
 
+    @route("/formOrJson",(Http.POST,Http.PUT))
+    def postArgumentsByContentType(self,request,first,last,**kwargs):
+        return "%s %s" % (str(first),str(last))
+
+
 def run_app_arguments():
     app = RESTResource((ArgumentApp(),))
     app.run(8082)
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corepost/test/feature/arguments.feature

@@ -3,7 +3,7 @@ Using step definitions from: '../steps'
 @arguments
 Feature: Arguments
 	CorePost should be able to correctly extract arguments
-	from paths, query arguments and form arguments
+	from paths, query arguments, form arguments and JSON documents
 	
 	@arguments_ok
 	Scenario Outline: Path argument extraction
@@ -29,4 +29,24 @@ Feature: Arguments
 			| url												| code	| content																|
 			| /int/WRONG/float/1.1/string/TEST					| 404	| URL '/int/WRONG/float/1.1/string/TEST' not found						|
 			| /int/1/float/WRONG/string/TEST					| 404	| URL '/int/1/float/WRONG/string/TEST' not found						|
-											|
\ No newline at end of file
+
+	@arguments_by_type
+	Scenario Outline: Parse form arguments OR from JSON documents for POST / PUT
+		Given 'arguments' is running
+		# pass in as form arguments
+		When as user 'None:None' I <method> 'http://127.0.0.1:8082/formOrJson' with 'first=John&last=Doe'
+		Then I expect HTTP code <code>
+		And I expect content contains 'John Doe'
+		# pass in as JSON document
+		When as user 'None:None' I <method> 'http://127.0.0.1:8082/formOrJson' with JSON
+		"""
+		{"first":"Jane","last":"Doeovskaya"}
+		"""
+		Then I expect HTTP code <code>
+		And I expect content contains 'Jane Doeovskaya'
+		
+		Examples:
+			| method	| code	|
+			| POST		| 201	|
+			| PUT		| 200	|
+											
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