formparser.py 文件源码

def parse(self, stream, mimetype, content_length, options=None):
        """Parses the information from the given stream, mimetype,
        content length and mimetype parameters.

        :param stream: an input stream
        :param mimetype: the mimetype of the data
        :param content_length: the content length of the incoming data
        :param options: optional mimetype parameters (used for
                        the multipart boundary for instance)
        :return: A tuple in the form ``(stream, form, files)``.
        """
        if self.max_content_length is not None and \
           content_length is not None and \
           content_length > self.max_content_length:
            raise exceptions.RequestEntityTooLarge()
        if options is None:
            options = {}

        parse_func = self.get_parse_func(mimetype, options)
        if parse_func is not None:
            try:
                return parse_func(self, stream, mimetype,
                                  content_length, options)
            except ValueError:
                if not self.silent:
                    raise

        return stream, self.cls(), self.cls()