decodePacket static method

dynamic decodePacket(dynamic encodedPacket, dynamic binaryType, bool utf8decode)

Implementation

static decodePacket(dynamic encodedPacket, binaryType, bool utf8decode) {
  var type;

  // String data
  if (encodedPacket is String) {
    type = encodedPacket[0];

    if (type == 'b') {
      return decodeBase64Packet((encodedPacket).substring(1), binaryType);
    }

    if (utf8decode == true) {
      try {
        encodedPacket = utf8.decode(encodedPacket.codeUnits);
      } catch (e) {
        return ERROR_PACKET;
      }
    }
    if ('${int.parse(type)}' != type ||
        PacketTypeList[type = int.parse(type)] == null) {
      return ERROR_PACKET;
    }

    if (encodedPacket.length > 1) {
      return {'type': PacketTypeList[type], 'data': encodedPacket.substring(1)};
    } else {
      return {'type': PacketTypeList[type]};
    }
  }

  // Binary data
  if (binaryType == 'arraybuffer' || encodedPacket is ByteBuffer) {
    // wrap Buffer/ArrayBuffer data into an Uint8Array
    var intArray = (encodedPacket as ByteBuffer).asUint8List();
    type = intArray[0];
    return {'type': PacketTypeList[type], 'data': intArray.sublist(0)};
  }

//    if (data instanceof ArrayBuffer) {
//      data = arrayBufferToBuffer(data);
//    }
  type = encodedPacket[0];
  return {'type': PacketTypeList[type], 'data': encodedPacket.sublist(1)};
}