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#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QPushButton>
#include <QUrl>
#include <QtNetwork>
#include <QDebug>

class mainWindow: public QMainWindow
{
    Q_OBJECT

public:
    mainWindow();

private:
    QPushButton *btn;

private slots:
    void searshFinished(QNetworkReply*);
    void sendRequest();
};

#endif // MAINWINDOW_H

#include <mainWindow.h>

mainWindow::mainWindow()
{
    btn = new QPushButton("go", this);
    connect(btn, SIGNAL(clicked()),this, SLOT(sendRequest()));
}

void mainWindow::sendRequest()
{    
    QNetworkAccessManager *manager = new QNetworkAccessManager(this);
    manager->get(QNetworkRequest(QUrl("http://www.youtube.com/")));
    connect(manager, SIGNAL(finished(QNetworkReply*)), this, SLOT(searshFinished(QNetworkReply*)));
}

void mainWindow::searshFinished(QNetworkReply* networkReply)
{
    if (!networkReply->error()) {
        QString data = QString::fromUtf8(networkReply->readAll());
        qDebug() << data;
    }else qDebug() << "error";

}