Qt开源作品37-网络中转服务器Qt自定义控件大全+UI定制+输入法+视频监控+物联网-

一、前言

用Qt做开发10年了，其中做过好多项目，基于现在web和移动互联网发展如此迅猛，大量的应用场景需要一个网络中转服务器，可以实现手机app或者其他客户端远程回控设备，现在物联网发展非常迅猛，这个将来也是大势所趋，所以有这个想法很久了，打算用Qt也来做个简单的网络中转服务器。

需求场景：

1. 手机端或者其他端可以对设备进行回控，并查看设备各种运行状态，接收报警推送等。
2. 同时支持在局域网、广域网、互联网访问，尤其是互联网访问。
3. 权限控制，给定账号控制授权的设备，并自动拉取设备信息。
4. 设备不在线要给出反馈信息提示以便分析。
5. 每个连接都有自己的唯一编号作为标识符。
6. 可以方便的拓展为微信接入+小程序接入+web接入。

二、代码思路

#include "tcpserver1.h" #include "quiwidget.h"  TcpClient1::TcpClient1(QObject *parent) :  QTcpSocket(parent) {     ip = "127.0.0.1";     port = 6907;     deviceID = "SSJC00000001";      connect(this, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(deleteLater()));     connect(this, SIGNAL(disconnected()), this, SLOT(deleteLater()));     connect(this, SIGNAL(readyRead()), this, SLOT(readData())); }  void TcpClient1::setIP(const QString &ip) {     this->ip = ip; }  QString TcpClient1::getIP() const {     return this->ip; }  void TcpClient1::setPort(int port) {     this->port = port; }  int TcpClient1::getPort() const {     return this->port; }  QString TcpClient1::getDeviceID() {     return this->deviceID; }  void TcpClient1::readData() {     QByteArray data = this->readAll();     if (data.length() <= 0) {         return;     }      //取出唯一标识符,并过滤,可自行更改过滤条件     QByteArray cmd = data.mid(App::CmdStart1, App::CmdLen1);     QString id = QString(cmd);     if (id.startsWith("S") && deviceID != id) {         deviceID = id;         //发送信号更新标识符         emit receiveDeviceID(ip, port, deviceID);     }      QString buffer;     if (App::HexData1) {         buffer = QUIHelper::byteArrayToHexStr(data);     } else {         buffer = QString(data);     }      emit receiveData(ip, port, deviceID, buffer); }  void TcpClient1::sendData(const QString &data) {     QByteArray buffer;     if (App::HexData1) {         buffer = QUIHelper::hexStrToByteArray(data);     } else {         buffer = data.toLatin1();     }      this->write(buffer);     emit sendData(ip, port, deviceID, data); }  TcpServer1::TcpServer1(QObject *parent) : QTcpServer(parent) { }  #if (QT_VERSION > QT_VERSION_CHECK(5,0,0)) void TcpServer1::incomingConnection(qintptr handle) #else void TcpServer1::incomingConnection(int handle) #endif {     TcpClient1 *client = new TcpClient1(this);     client->setSocketDescriptor(handle);     connect(client, SIGNAL(disconnected()), this, SLOT(disconnected()));     connect(client, SIGNAL(sendData(QString, int, QString, QString)), this, SIGNAL(sendData(QString, int, QString, QString)));     connect(client, SIGNAL(receiveData(QString, int, QString, QString)), this, SIGNAL(receiveData(QString, int, QString, QString)));     connect(client, SIGNAL(receiveDeviceID(QString, int, QString)), this, SIGNAL(receiveDeviceID(QString, int, QString)));      QString ip = client->peerAddress().toString();     int port = client->peerPort();     QString deviceID = client->getDeviceID();     client->setIP(ip);     client->setPort(port);     emit clientConnected(ip, port, deviceID);     emit sendData(ip, port, deviceID, "客户端上线");      //追加到链表中     clients.append(client); }  void TcpServer1::disconnected() {     TcpClient1 *client = (TcpClient1 *)sender();     QString ip = client->getIP();     int port = client->getPort();     QString deviceID = client->getDeviceID();     emit clientDisconnected(ip, port, deviceID);     emit sendData(ip, port, deviceID, "客户端下线");      //断开连接后从链表中移除     clients.removeOne(client); }  bool TcpServer1::start() { #if (QT_VERSION > QT_VERSION_CHECK(5,0,0))     bool ok = listen(QHostAddress::AnyIPv4, App::ListenPort1); #else     bool ok = listen(QHostAddress::Any, App::ListenPort1); #endif     return ok; }  void TcpServer1::stop() {     foreach (TcpClient1 *client, clients) {         client->disconnectFromHost();     }      this->close(); }  bool TcpServer1::writeData(const QString &deviceID, const QString &data) {     bool ok = false;     foreach (TcpClient1 *client, clients) {         if (client->getDeviceID() == deviceID) {             client->sendData(data);                         ok = true;                     }     }         return ok; } 

三、效果图

四、开源主页

以上作品完整源码下载都在开源主页，会持续不断更新作品数量和质量，欢迎各位关注。

1. 国内站点：https://gitee.com/feiyangqingyun/QWidgetDemo
2. 国际站点：https://github.com/feiyangqingyun/QWidgetDemo
3. 个人主页：https://blog.csdn.net/feiyangqingyun
4. 知乎主页：https://www.zhihu.com/people/feiyangqingyun/