wrappers.py 文件源码

def _load_form_data(self):
        """Method used internally to retrieve submitted data.  After calling
        this sets `form` and `files` on the request object to multi dicts
        filled with the incoming form data.  As a matter of fact the input
        stream will be empty afterwards.  You can also call this method to
        force the parsing of the form data.

        .. versionadded:: 0.8
        """
        # abort early if we have already consumed the stream
        if 'form' in self.__dict__:
            return

        _assert_not_shallow(self)

        if self.want_form_data_parsed:
            content_type = self.environ.get('CONTENT_TYPE', '')
            content_length = get_content_length(self.environ)
            mimetype, options = parse_options_header(content_type)
            parser = self.make_form_data_parser()
            data = parser.parse(self._get_stream_for_parsing(),
                                mimetype, content_length, options)
        else:
            data = (self.stream, self.parameter_storage_class(),
                    self.parameter_storage_class())

        # inject the values into the instance dict so that we bypass
        # our cached_property non-data descriptor.
        d = self.__dict__
        d['stream'], d['form'], d['files'] = data