def get_raw_data_form(self, data, view, method, request):
        """
        Returns a form that allows for arbitrary content types to be tunneled
        via standard HTML forms.
        (Which are typically application/x-www-form-urlencoded)
        """
        # See issue #2089 for refactoring this.
        serializer = getattr(data, 'serializer', None)
        if serializer and not getattr(serializer, 'many', False):
            instance = getattr(serializer, 'instance', None)
            if isinstance(instance, Page):
                instance = None
        else:
            instance = None

        with override_method(view, request, method) as request:
            # If we're not using content overloading there's no point in
            # supplying a generic form, as the view won't treat the form's
            # value as the content of the request.
            if not (api_settings.FORM_CONTENT_OVERRIDE and
                    api_settings.FORM_CONTENTTYPE_OVERRIDE):
                return None

            # Check permissions
            if not self.show_form_for_method(view, method, request, instance):
                return

            # If possible, serialize the initial content for the generic form
            default_parser = view.parser_classes[0]
            renderer_class = getattr(default_parser, 'renderer_class', None)
            if (hasattr(view, 'get_serializer') and renderer_class):
                # View has a serializer defined and parser class has a
                # corresponding renderer that can be used to render the data.

                if method in ('PUT', 'PATCH'):
                    serializer = view.get_serializer(instance=instance)
                else:
                    serializer = view.get_serializer()

                # Render the raw data content
                renderer = renderer_class()
                accepted = self.accepted_media_type
                context = self.renderer_context.copy()
                context['indent'] = 4
                content = renderer.render(serializer.data, accepted, context)
            else:
                content = None

            # Generate a generic form that includes a content type field,
            # and a content field.
            content_type_field = api_settings.FORM_CONTENTTYPE_OVERRIDE
            content_field = api_settings.FORM_CONTENT_OVERRIDE

            media_types = [parser.media_type for parser in view.parser_classes]
            choices = [(media_type, media_type) for media_type in media_types]
            initial = media_types[0]

            # NB. http://jacobian.org/writing/dynamic-form-generation/
            class GenericContentForm(forms.Form):
                def __init__(self):
                    super(GenericContentForm, self).__init__()

                    self.fields[content_type_field] = forms.ChoiceField(
                        label='Media type',
                        choices=choices,
                        initial=initial
                    )
                    self.fields[content_field] = forms.CharField(
                        label='Content',
                        widget=forms.Textarea,
                        initial=content
                    )

            return GenericContentForm()
    def get_rendered_html_form(self, data, view, method, request):
        """
        Return a string representing a rendered HTML form, possibly bound to
        either the input or output data.

        In the absence of the View having an associated form then return None.
        """
        # See issue #2089 for refactoring this.
        serializer = getattr(data, 'serializer', None)
        if serializer and not getattr(serializer, 'many', False):
            instance = getattr(serializer, 'instance', None)
            if isinstance(instance, Page):
                instance = None
        else:
            instance = None

        # If this is valid serializer data, and the form is for the same
        # HTTP method as was used in the request then use the existing
        # serializer instance, rather than dynamically creating a new one.
        if request.method == method and serializer is not None:
            try:
                kwargs = {'data': request.data}
            except ParseError:
                kwargs = {}
            existing_serializer = serializer
        else:
            kwargs = {}
            existing_serializer = None

        with override_method(view, request, method) as request:
            if not self.show_form_for_method(view, method, request, instance):
                return

            if method in ('DELETE', 'OPTIONS'):
                return True  # Don't actually need to return a form

            has_serializer = getattr(view, 'get_serializer', None)
            has_serializer_class = getattr(view, 'serializer_class', None)

            if (
                (not has_serializer and not has_serializer_class) or
                not any(is_form_media_type(parser.media_type) for parser in view.parser_classes)
            ):
                return

            if existing_serializer is not None:
                serializer = existing_serializer
            else:
                if has_serializer:
                    if method in ('PUT', 'PATCH'):
                        serializer = view.get_serializer(instance=instance, **kwargs)
                    else:
                        serializer = view.get_serializer(**kwargs)
                else:
                    # at this point we must have a serializer_class
                    if method in ('PUT', 'PATCH'):
                        serializer = self._get_serializer(view.serializer_class, view,
                                                          request, instance=instance, **kwargs)
                    else:
                        serializer = self._get_serializer(view.serializer_class, view,
                                                          request, **kwargs)

            if hasattr(serializer, 'initial_data'):
                serializer.is_valid()

            form_renderer = self.form_renderer_class()
            return form_renderer.render(
                serializer.data,
                self.accepted_media_type,
                dict(
                    list(self.renderer_context.items()) +
                    [('template', 'drf.rest_framework/api_form.html')]
                )
            )