QT-C++多线程TCP客户端

• 前言
• • 1.效果预览
  • 2.核心程序
  • 3.程序下载

前言

将接收消息和发送消息分别用不同线程处理，支持服务器掉线客户端重新连接机制，内置自动消息发送和接收处理方式，内置心跳包发送。

提示：以下是本篇文章正文内容，下面案例可供参考

1.效果预览

2.核心程序

代码如下：

// 发送线程
DWORD WINAPI cSocketClient::sendCmdDataThread(LPVOID lpParam)
{
	cSocketClient *pMain = (cSocketClient*)lpParam;
	int nStep = 0;
	sUnChokeTimer timer[2];
	int nReConnectTimes = 3 * 1000;
	int nHeatTickTimes = 10 * 1000;
	cSendInfo sendInfo;
	while (true)
	{
		if (pMain->isRelease())
			return 0;
		else
			QThread::msleep(5);

		switch (nStep)
		{
		case 0:
		{
			// 等待连接
			if (!pMain->isConnected())
				QThread::msleep(500);
			else
			{
				timer[1].start(nHeatTickTimes);
				nStep = 1;
			}
				
		}break;

		case 1:
		{
			// 判断服务器掉线，需要重连接
			if (!pMain->isConnected() && !pMain->d_ptr->strIp.isEmpty())
			{
				timer[0].start(nReConnectTimes);
				nStep = 2;
			}
			else
			{
				nStep = 3;
			}
		}break;

		case 2:
		{
			if (timer[0].isTimeOut())
			{
				// 重连接
				pMain->connect(pMain->d_ptr->strIp, pMain->d_ptr->nPort);
				nStep = 1;
			}
		}break;

		case 3:
		{
			if (pMain->d_ptr->strSendDataList.size() > 0)
			{
				// 发送消息队列的消息
				QString strData("");
				pMain->operaterSendDataList(OP_TAKE_FIRST, strData);
				
				pMain->sendData(pMain->d_ptr->socket, (char*)strData.toLocal8Bit().toStdString().c_str(), strData.toLocal8Bit().toStdString().size());
				
				// 有消息就重新计时，心跳重发时间
				timer[1].start(nHeatTickTimes);
			}

			nStep = 4;
		}break;

		case 4:
		{
			// 长时间无消息，发送心跳包
			if (timer[1].isTimeOut())
			{
				QString strData = sendInfo.heartBeat();
				pMain->operaterSendDataList(OP_APPEND, strData);
			}

			nStep = 5;
		}break;

		case 5:
		{
			// 处理从服务器接收回来的数据包
			QString strData("");
			pMain->operaterReiceveBuffer(OP_TAKE_FIRST, strData);
			pMain->dealRecieveInfo(strData);

			nStep = 6;
		}break;

		default:
			nStep = 1;
			break;
		}
	}

	return 0;
}

// 接收线程
DWORD WINAPI cSocketClient::recieveCmdDataThread(LPVOID lpParam)
{
	cSocketClient *pMain = (cSocketClient*)lpParam;
	int nStep = 0;
	while (true)
	{
		// 资源退出，线程也退出
		if (pMain->isRelease())
			return 0;
		else
			QThread::msleep(5);

		switch (nStep)
		{
		case 0:
		{
			// 等待连接
			if (!pMain->isConnected())
				QThread::msleep(500);
			else
				nStep = 1;
		}break;

		case 1:
		{
			// 设置接收不阻塞
			u_long   ioMode = 1;
			::ioctlsocket((SOCKET)pMain->d_ptr->socket, FIONBIO, (u_long FAR*)&ioMode);
			nStep = 2;
		}break;

		case 2:
		{
			// 接收服务端数据
			memset(pMain->d_ptr->chReciveBuff, '\0', sizeof(pMain->d_ptr->chReciveBuff));
			int nRecieveSize = ::recv(pMain->d_ptr->socket, pMain->d_ptr->chReciveBuff, MAX_BUFF_SIZE, NULL);;
			if (nRecieveSize > 0)
			{
				pMain->d_ptr->chReciveBuff[nRecieveSize] = '\0';

				std::string str(pMain->d_ptr->chReciveBuff, nRecieveSize);
				pMain->operaterReiceveBuffer(OP_APPEND, QString::fromLocal8Bit(str.data()));
				emit pMain->signalRevieveInfo(QString::fromLocal8Bit(str.data()));
			}
			else if (nRecieveSize == SERVER_NO_LINE)
			{
				// 服务端掉线
				pMain->close();
				nStep = 0;
			}
			
		}break;

		default:
			nStep = 1;
			break;
		}
	
	}

	return 0;
}t

3.程序下载

https://download.csdn.net/download/u013083044/21910665