def receive_message(sock, operation, request_id, max_message_size=MAX_MESSAGE_SIZE):
 header = _receive_data_on_socket(sock, 16)
 length = _UNPACK_INT(header[:4])[0]
 actual_op = _UNPACK_INT(header[12:])[0]
 if (operation != actual_op):
  raise ProtocolError(('Got opcode %r but expected %r' % (actual_op, operation)))
 if (request_id is not None):
  response_id = _UNPACK_INT(header[8:12])[0]
  if (request_id != response_id):
   raise ProtocolError(('Got response id %r but expected %r' % (response_id, request_id)))
 if (length <= 16):
  raise ProtocolError(('Message length (%r) not longer than standard message header size (16)' % (length,)))
 if (length > max_message_size):
  raise ProtocolError(('Message length (%r) is larger than server max message size (%r)' % (length, max_message_size)))
 return _receive_data_on_socket(sock, (length - 16))

def receive_message ( sock , operation , request_id , max_message_size = MAX_MESSAGE_SIZE ) : header = _receive_data_on_socket ( sock , 16 ) length = _UNPACK_INT ( header [ : 4 ] ) [ 0 ] actual_op = _UNPACK_INT ( header [ 12 : ] ) [ 0 ] if ( operation != actual_op ) : raise ProtocolError ( ( 'Got opcode %r but expected %r' % ( actual_op , operation ) ) ) if ( request_id is not None ) : response_id = _UNPACK_INT ( header [ 8 : 12 ] ) [ 0 ] if ( request_id != response_id ) : raise ProtocolError ( ( 'Got response id %r but expected %r' % ( response_id , request_id ) ) ) if ( length <= 16 ) : raise ProtocolError ( ( 'Message length (%r) not longer than standard message header size (16)' % ( length , ) ) ) if ( length > max_message_size ) : raise ProtocolError ( ( 'Message length (%r) is larger than server max message size (%r)' % ( length , max_message_size ) ) ) return _receive_data_on_socket ( sock , ( length - 16 ) )
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