Qt network

The QNetworkAccessManager class allows applications to send network requests and receive responses. The
QNetworkRequest class saves the request to be sent using QNetworkAccessManager. The
QNetworkReply class contains the response data after the request sent using QNetworkAccessManager.

#include "widget.h"
#include "ui_widget.h"
#include <QNetworkRequest>

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    m_network = new QNetworkAccessManager(this);
    ui->lineEdit->setText("https://www.baidu.com");
    m_reply = nullptr;
}

Widget::~Widget()
{
    delete ui;
}

void Widget::on_pushButton_clicked()
{
    m_reply =  m_network->get(QNetworkRequest(QUrl(ui->lineEdit->text())));
    connect(m_reply,&QNetworkReply::finished,this,&Widget::finishedSlot);
    connect(m_reply,&QNetworkReply::readyRead,this,&Widget::readSlot);
}

void Widget::finishedSlot()
{
    m_reply->deleteLater();
    m_reply = nullptr;
    qDebug() << "reply finished";
}

void Widget::readSlot()
{
    qDebug() << m_reply->readAll();
}

Source code: https://github.com/sunlianqi/qt/tree/master/network