packet.py 文件源码

def decode(self, encoded_packet):
        """Decode a transmitted package."""
        b64 = False
        if not isinstance(encoded_packet, binary_types):
            encoded_packet = encoded_packet.encode('utf-8')
        elif not isinstance(encoded_packet, bytes):
            encoded_packet = bytes(encoded_packet)
        self.packet_type = six.byte2int(encoded_packet[0:1])
        if self.packet_type == 98:  # 'b' --> binary base64 encoded packet
            self.binary = True
            encoded_packet = encoded_packet[1:]
            self.packet_type = six.byte2int(encoded_packet[0:1])
            self.packet_type -= 48
            b64 = True
        elif self.packet_type >= 48:
            self.packet_type -= 48
            self.binary = False
        else:
            self.binary = True
        self.data = None
        if len(encoded_packet) > 1:
            if self.binary:
                if b64:
                    self.data = base64.b64decode(encoded_packet[1:])
                else:
                    self.data = encoded_packet[1:]
            else:
                try:
                    self.data = self.json.loads(
                        encoded_packet[1:].decode('utf-8'))
                except ValueError:
                    self.data = encoded_packet[1:].decode('utf-8')