Qt QWebSocketServer网络编程 服务端和客户端

        QWebSocketServer以QTcpServer为模型，行为相同，我们对QTcpServer使用方法有了解的，会很快对该类上手。

enum QWebSocketServer::SslMode：指示服务器运行模式。

SecureMode：服务器以安全模式运行（wss）。

NonSecureMode：服务器以非安全模式运行（ws）。

简介TCP三次握手：

服务端： 

头文件

#ifndef QWEBSOCKETWIDGET_H
#define QWEBSOCKETWIDGET_H
 
#include <QWidget>
#include <QWebSocket>
#include <QDateTime>
QT_BEGIN_NAMESPACE
namespace Ui { class QWebSocketWidget; }
QT_END_NAMESPACE
 
class QWebSocketWidget : public QWidget
{
    Q_OBJECT
 
public:
    QWebSocketWidget(QWidget *parent = nullptr);
    ~QWebSocketWidget();
 
private slots:
    void on_ConnectBtn_clicked();
 
    void on_disConnectBtn_clicked();
 
    void on_sendDataBtn_clicked();
 
    void on_clearlogDataBtn_clicked();
 
    void onDisconnected();
    void onConnected();
    void onTextMessageRecived(QString str);
 
private:
    QWebSocket Websocket;
 
private:
    Ui::QWebSocketWidget *ui;
};
#endif // QWEBSOCKETWIDGET_H

源文件

#include "qwebsocketwidget.h"
#include "ui_qwebsocketwidget.h"
 
QWebSocketWidget::QWebSocketWidget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::QWebSocketWidget)
{
    ui->setupUi(this);
    //连接信号和槽函数
    setWindowTitle("客户端");
    connect(&Websocket,&QWebSocket::disconnected,this,&QWebSocketWidget::onDisconnected);//客户端断开连接
    connect(&Websocket,&QWebSocket::connected,this,&QWebSocketWidget::onConnected);//客户端连接服务端
    connect(&Websocket,&QWebSocket::textMessageReceived,this,&QWebSocketWidget::onTextMessageRecived);//客户端收到服务端消息
 
}
 
QWebSocketWidget::~QWebSocketWidget()
{
    delete ui;
}
 
//连接服务端
void QWebSocketWidget::on_ConnectBtn_clicked()
{
    ui->LogtextEdit->setText(QDateTime::currentDateTime().toString()+":开始连接");
    QString urlStr = QString("ws://%1").arg(ui->portlineEdit->text());//地址和端口
    Websocket.open(QUrl(urlStr));//套接字获得地址和端口的属性
}
//断开服务端
void QWebSocketWidget::on_disConnectBtn_clicked()
{
    Websocket.close();
}
//发送数据到服务端
void QWebSocketWidget::on_sendDataBtn_clicked()
{
   QString str = QDateTime::currentDateTime().toString()+":给服务端发送消息:"+ui->SendDatatextEdit->toPlainText();
   ui->LogtextEdit->setText(str);
   Websocket.sendTextMessage(ui->SendDatatextEdit->toPlainText());//给服务端发消息
 
}
//清空日志信息
void QWebSocketWidget::on_clearlogDataBtn_clicked()
{
    ui->LogtextEdit->clear();
}
 
void QWebSocketWidget::onDisconnected()
{
    QString str = QDateTime::currentDateTime().toString()+"客户端断开连接！";
    ui->LogtextEdit->setText(str);
}
 
void QWebSocketWidget::onConnected()
{
    QString str = QDateTime::currentDateTime().toString()+":客户端连接服务端！";
    ui->LogtextEdit->setText(str);
}
 
void QWebSocketWidget::onTextMessageRecived(QString str)
{
     QString str1 = QDateTime::currentDateTime().toString()+":服务端发来消息："+str;
     ui->LogtextEdit->setText(str1);
}

客户端：

头文件

#ifndef WEBSOCKETSERVERWIDGET_H
#define WEBSOCKETSERVERWIDGET_H
 
#include <QWidget>
#include <QWebSocketServer>
#include <QWebSocket>
#include <QDateTime>
QT_BEGIN_NAMESPACE
namespace Ui { class webSocketServerWidget; }
QT_END_NAMESPACE
 
class webSocketServerWidget : public QWidget
{
    Q_OBJECT
 
public:
    webSocketServerWidget(QWidget *parent = nullptr);
    ~webSocketServerWidget();
 
private slots:
    void on_StartListen_clicked();//开始监听
    void on_endListen_clicked();//结束监听
    void OnNewConnection();//新连接接入服务端
    void onTextMessageReived(QString str);//接受客户端发送的消息
    void onDisconnected();//客户端断开连接给服务端发消息
 
    void on_sendData_clicked();
 
    void on_clearLog_clicked();
 
private:
    QWebSocketServer* socketServer;//服务端
    QWebSocket* websocket;//客户端
 
 
private:
    Ui::webSocketServerWidget *ui;
};
#endif // WEBSOCKETSERVERWIDGET_H

源文件

#include "websocketserverwidget.h"
#include "ui_websocketserverwidget.h"
 
webSocketServerWidget::webSocketServerWidget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::webSocketServerWidget)
{
    ui->setupUi(this);
    setWindowTitle("服务端");
    socketServer =  new QWebSocketServer("Server",QWebSocketServer::NonSecureMode);//采用非安全模式
    //客户端有新连接接入时，服务端会触发这个信号
    connect(socketServer,&QWebSocketServer::newConnection,this,&webSocketServerWidget::OnNewConnection);
}
 
webSocketServerWidget::~webSocketServerWidget()
{
    delete ui;
}
 
 
void webSocketServerWidget::on_StartListen_clicked()
{
    if(ui->StartListen->text().isEmpty())
        return;
    int port = ui->lineEditPort->text().toInt();
    socketServer->listen(QHostAddress::Any,port);//服务端套接字监听（ip地址，端口）
    ui->logTextLine->setText(QDateTime::currentDateTime().toString()+":开始监听");
 
}
 
void webSocketServerWidget::OnNewConnection()
{
    websocket = socketServer->nextPendingConnection();
    connect(websocket,&QWebSocket::textMessageReceived,this,&webSocketServerWidget::onTextMessageReived);
    connect(websocket,&QWebSocket::disconnected,this,&webSocketServerWidget::onDisconnected);
}
 
void webSocketServerWidget::onTextMessageReived(QString str)
{
    ui->logTextLine->setText(QDateTime::currentDateTime().toString()+":有新的连接进入，"+str);
}
 
void webSocketServerWidget::onDisconnected()
{
    ui->logTextLine->setText(QDateTime::currentDateTime().toString()+"客户端断开连接");
}
 
void webSocketServerWidget::on_endListen_clicked()
{
    ui->log->setText(QDateTime::currentDateTime().toString()+":停止监听");
    if(socketServer->isListening())
        socketServer->close();
}
 
void webSocketServerWidget::on_sendData_clicked()
{
    QString msg = ui->textEditSendData->toPlainText();
    websocket->sendTextMessage(msg);
    ui->logTextLine->setText(QDateTime::currentDateTime().toString()+":服务端发送消息:"+ui->textEditSendData->toPlainText());
}
 
void webSocketServerWidget::on_clearLog_clicked()
{
    ui->logTextLine->clear();
}

资源链接

Qt网络编程QWebSocketServer和QWebSocket客户端和网络端demo-C++文档类资源-CSDN下载