Bug: can't handle multiple frames in same chunk (lost payload)

[Pithikos]

Due to the way the recv works in the server, it can't handle situations where multiple information come via the same websocket message at once.

Example

myserver._decode_data_frame(b'\x89\x80z\x95`\xc7\x81\xfe\x00\x95j\xb1\n\x00\x11\x93ov\x0f\xdf~"P')
# Recognizes as a PING

In the above case a ping comes and directly after a valid payload is followed but is totally discarded by the server.

The culprit is in this code

    def _recv(self, client, user=False):
        """Receive a message from the client. Will block this thread until a message is received.

            :param client: The client to receive a message from.
        """
        try:
            address = client.getpeername()
            data = client.recv(2048)
            ..

The right approach would be to read the message byte-by-byte instead of an arbitrary chunk.