Method pong

lib/cpp/src/thrift/transport/TWebSocketServer.h:213–220

  }

  void pong() {
    writeFrameHeader(Opcode::Pong);
    uint8_t* buffer;
    uint32_t size;
    readBuffer_.getBuffer(&buffer, &size);
    transport_->write(buffer, size);
    transport_->flush();
  }

  bool readFrame() {
    uint8_t headerBuffer[8];