          except:
              pass
  
          return self.request.build_absolute_uri(path)
      
      
      def determine_method(self, request):
          """Determine the HTTP method that this request should be treated as.
          Allows PUT and DELETE tunneling via the _method parameter if METHOD_PARAM is set."""
          method = request.method.upper()
  
          if method == 'POST' and self.METHOD_PARAM and request.POST.has_key(self.METHOD_PARAM):
              method = request.POST[self.METHOD_PARAM].upper()
          
          return method
  
  
      def authenticate(self, request):
          """Attempt to authenticate the request, returning an authentication context or None.
          An authentication context may be any object, although in many cases it will be a User instance."""
 
</s> remove         if method == 'POST' and self.FORM_PARAM_METHOD and request.POST.has_key(self.FORM_PARAM_METHOD):
            method = request.POST[self.FORM_PARAM_METHOD].upper()
 </s> add         if method == 'POST' and self.METHOD_PARAM and request.POST.has_key(self.METHOD_PARAM):
            method = request.POST[self.METHOD_PARAM].upper() </s> remove     FORM_PARAM_METHOD = '_method'
 </s> add     METHOD_PARAM = '_method' </s> remove     def get_form(self, data=None):
        """Optionally return a Django Form instance, which may be used for validation
        and/or rendered by an HTML/XHTML emitter.
        
        If data is not None the form will be bound to data."""

        if self.form:
            if data:
                return self.form(data)
            else:
                return self.form()
        return None
  
  
    def cleanup_request(self, data, form_instance):
        """Perform any resource-specific data deserialization and/or validation
        after the initial HTTP content-type deserialization has taken place.
        
        Returns a tuple containing the cleaned up data, and optionally a form bound to that data.
        
        By default this uses form validation to filter the basic input into the required types."""

        if form_instance is None:
            return data
        
        # Default form validation does not check for additional invalid fields
        non_existent_fields = []
        for key in set(data.keys()) - set(form_instance.fields.keys()):
            non_existent_fields.append(key)

        if not form_instance.is_valid() or non_existent_fields:
            if not form_instance.errors and not non_existent_fields:
                # If no data was supplied the errors property will be None
                details = 'No content was supplied'
                
            else:
                # Add standard field errors
                details = dict((key, map(unicode, val)) for (key, val) in form_instance.errors.iteritems() if key != '__all__')

                # Add any non-field errors
                if form_instance.non_field_errors():
                    details['errors'] = form_instance.non_field_errors()

                # Add any non-existent field errors
                for key in non_existent_fields:
                    details[key] = ['This field does not exist']

            # Bail.  Note that we will still serialize this response with the appropriate content type 
            raise ResponseException(status.HTTP_400_BAD_REQUEST, {'detail': details})

        return form_instance.cleaned_data

 </s> add  </s> remove     FORM_PARAM_CONTENTTYPE = '_contenttype'
 </s> add     CONTENTTYPE_PARAM = '_contenttype' </s> remove     def determine_parser(self, request):
        """Return the appropriate parser for the input, given the client's 'Content-Type' header,
        and the content types that this Resource knows how to parse."""
        content_type = request.META.get('CONTENT_TYPE', 'application/x-www-form-urlencoded')
        raw_content = request.raw_post_data
    
        split = content_type.split(';', 1)
        if len(split) > 1:
            content_type = split[0]
        content_type = content_type.strip()
        
        # If CONTENTTYPE_PARAM is turned on, and this is a standard POST form then allow the content type to be overridden
        if (content_type == 'application/x-www-form-urlencoded' and
            request.method == 'POST' and
            self.CONTENTTYPE_PARAM and
            self.CONTENT_PARAM and
            request.POST.get(self.CONTENTTYPE_PARAM, None) and
            request.POST.get(self.CONTENT_PARAM, None)):
            raw_content = request.POST[self.CONTENT_PARAM]
            content_type = request.POST[self.CONTENTTYPE_PARAM]

        # Create a list of list of (media_type, Parser) tuples
        media_type_to_parser = dict([(parser.media_type, parser) for parser in self.parsers])

        try:
            return (media_type_to_parser[content_type], raw_content)
        except KeyError:
            raise ResponseException(status.HTTP_415_UNSUPPORTED_MEDIA_TYPE,
                                    {'detail': 'Unsupported media type \'%s\'' % content_type})


 </s> add 
          except:
              pass
  
          return self.request.build_absolute_uri(path)











  
  
      def authenticate(self, request):
          """Attempt to authenticate the request, returning an authentication context or None.
          An authentication context may be any object, although in many cases it will be a User instance."""
keep keep keep keep replace replace replace replace replace replace replace replace replace replace replace keep keep keep keep keep
 Refactor a bunch of stuff into mixins, more tests 
djangorestframework/resource.py