Qt实现http服务的示例代码

先看执行结果：

Qt HttpServer

左边是开启的Qt Http服务，监控服务端口，及接收客户端请求；右侧是浏览器访问服务。

下面是具体代码：

HttpDemo.pro

QT += core
QT += network
QT -= gui
 
CONFIG += c++11 console
CONFIG -= app_bundle
 
# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
 
# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
 
SOURCES += \
        main.cpp \
        myhttpserver.cpp
 
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target
 
HEADERS += \
    myhttpserver.h

myhttpserver.h

#ifndef MYHTTPSERVER_H
#define MYHTTPSERVER_H
 
#include 
#include 
#include 
 
class MyHttpServer : public QObject
{
    Q_OBJECT
public:
    explicit MyHttpServer(QObject *parent = nullptr);
    ~MyHttpServer();
 
    QTcpSocket *socket;
 
public slots:
    void connection();
 
private:
    qint64 bytesAvailable() const;
    QTcpServer *server;
 
signals:
 
public slots:
};
 
#endif // MYHTTPSERVER_H

main.cpp

#include 
#include "myhttpserver.h"
 
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
 
    MyHttpServer server;
 
    return a.exec();
}

myhttpserver.cpp

#include "myhttpserver.h"
#include 
 
MyHttpServer::MyHttpServer(QObject *parent) : QObject(parent)
{
    server = new QTcpServer(this);
    connect(server, &QTcpServer::newConnection, this, &MyHttpServer::connection);
    if(!server->listen(QHostAddress::Any, 8080))
    {
        qDebug() << "\nWeb服务未启动";
    }
    else
    {
         qDebug() << "\nWeb服务在端口8080等待客户端连接";
    }
}
 
void MyHttpServer::connection()
{
    socket = server->nextPendingConnection();
 
    while (!(socket->waitForReadyRead(100))); //等待从浏览器读取数据
 
    char webBrowerRXData[1000];
    int sv = socket->read(webBrowerRXData, 1000);
    qDebug() << "正在从浏览器读取数据=" << QString(webBrowerRXData);
 
    socket->write("HTTP/1.1 200 OK\r\n");       // \r needs to be before   \n
    socket->write("Content-Type: text/html\r\n");
    socket->write("Connection: close\r\n");
    socket->write("Refresh: 1\r\n\r\n");        //refreshes web brower   every second.Request
 
    socket->write(""
                  ""
                      "
"
                        ""
                        ""
                      "
"
                      "已连接秒数：");
    QByteArray str;
    static qint16 count;    //用于在浏览器上显示的统计数字
    str.setNum(count++);
    socket->write(str);
    socket->write(""
                  "");
 
    socket->flush();
    connect(socket, &QTcpSocket::disconnected, socket, &QTcpSocket::deleteLater);
    socket->disconnectFromHost();
 
}
 
 
MyHttpServer::~MyHttpServer()
{
    socket->close();
}

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