request.py 文件源码

def _body_file__get(self):
        """
            Input stream of the request (wsgi.input).
            Setting this property resets the content_length and seekable flag
            (unlike setting req.body_file_raw).
        """
        if not self.is_body_readable:
            return io.BytesIO()
        r = self.body_file_raw
        clen = self.content_length
        if not self.is_body_seekable and clen is not None:
            # we need to wrap input in LimitedLengthFile
            # but we have to cache the instance as well
            # otherwise this would stop working
            # (.remaining counter would reset between calls):
            #   req.body_file.read(100)
            #   req.body_file.read(100)
            env = self.environ
            wrapped, raw = env.get('webob._body_file', (0,0))
            if raw is not r:
                wrapped = LimitedLengthFile(r, clen)
                wrapped = io.BufferedReader(wrapped)
                env['webob._body_file'] = wrapped, r
            r = wrapped
        return r