基于QT5的TCP服务端

#include "server.h" #include <QDebug> Server::Server(QObject *parent):QTcpServer(parent) { } //新的客户端连接到服务器，则新建一个socket对象用以实例化客户端 void Server::incomingConnection(qintptr socketDescriptor) { TcpClientSocket *tcpClientSocket = new TcpClientSocket(this); connect(tcpClientSocket,SIGNAL(updateClients(QHostAddress,QString)),this,SLOT(updateClients(QHostAddress,QString))); connect(tcpClientSocket,SIGNAL(disconnected(int)),this,SLOT(slotDisconnected(int))); tcpClientSocket->setSocketDescriptor(socketDescriptor); tcpClientSocketList.append(tcpClientSocket); //新客户端进来，触发更新信号，这个信号函数是自己定义的，可以显示目前有多少个客户端在线 emit updateServer(tcpClientSocketList.count()); } //有客户端发送数据进来了，可以在这里处理数据，然后发送到界面显示。 void Server::updateClients(QHostAddress ip,QString msg) { //TODO 这里可以进行一些逻辑处理 //把信息转发给主界面显示 emit sendreceivedClientDataToMainWindow(ip.toString(),msg); } void Server::acceptSendDataFromInputToClient(QString msg) { for(int i=0;i<tcpClientSocketList.count();i++) { QTcpSocket *item = tcpClientSocketList.at(i); item->write(msg.toLocal8Bit()); } } //客户端断连接触发信号,如果该客户端断链，则从IP队列中删除该客户端IP void Server::slotDisconnected(int descriptor) { for(int i=0;i<tcpClientSocketList.count();i++) { QTcpSocket *item = tcpClientSocketList.at(i); if(item->socketDescriptor()==descriptor) { tcpClientSocketList.removeAt(i); } } emit updateServer(tcpClientSocketList.count()); } //获取本机IP地址函数，这个函数可以获得当前电脑的IP地址 QString Server::getHostIpAddress() { QString strIpAddress; QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses(); int nListSize = ipAddressesList.size(); for (int i = 0; i < nListSize; ++i) { if (ipAddressesList.at(i) != QHostAddress::LocalHost && ipAddressesList.at(i).toIPv4Address()) { strIpAddress = ipAddressesList.at(i).toString(); break; } } if (strIpAddress.isEmpty()) strIpAddress = QHostAddress(QHostAddress::LocalHost).toString(); return strIpAddress; }