http1connection.py 文件源码

def _parse_headers(self, data):
        # The lstrip removes newlines that some implementations sometimes
        # insert between messages of a reused connection.  Per RFC 7230,
        # we SHOULD ignore at least one empty line before the request.
        # http://tools.ietf.org/html/rfc7230#section-3.5
        data = native_str(data.decode('latin1')).lstrip("\r\n")
        # RFC 7230 section allows for both CRLF and bare LF.
        eol = data.find("\n")
        start_line = data[:eol].rstrip("\r")
        try:
            headers = httputil.HTTPHeaders.parse(data[eol:])
        except ValueError:
            # probably form split() if there was no ':' in the line
            raise httputil.HTTPInputError("Malformed HTTP headers: %r" %
                                          data[eol:100])
        return start_line, headers