code: def read_http(self, length):
          
          _plen = self._read_binary(3)
          _type = self._read_unpack(1)
          _flag = self._read_binary(1)
          _stid = self._read_binary(4)
docs: Read Hypertext Transfer Protocol version 2.
  
          Structure of HTTP/2 packet [RFC 7230]:
              +-----------------------------------------------+
              |                 Length (24)                   |
              +---------------+---------------+---------------+
              |   Type (8)    |   Flags (8)   |
              +-+-------------+---------------+-------------------------------+
              |R|                 Stream Identifier (31)                      |
              +=+=============================================================+
              |                   Frame Payload (0...)                      ...
              +---------------------------------------------------------------+