Russian Qt Forum

C++ (Qt)
 
#include <iostream>
 
#include <QString>
#include <QObject>
#include <QCoreApplication>
 
#include "Shower.h"
#include "Downloader.h"
 
int main( int argc, char *argv[] )
{
    QCoreApplication app( argc, argv );
 
    Downloader downloader;
    Shower shower;
    QObject::connect( &downloader, SIGNAL( signalWithContent( QString* ) ),
                      &shower, SLOT( show( QString* ) ) );
 
    QString url = "http://qtobserver.freeoda.com/installing_netbeans.php";
    downloader.fetch( url );
 
    return app.exec();
}
 

C++ (Qt)
#ifndef DOWNLOADER_H
#define DOWNLOADER_H
 
#include <memory>
#include <string>
 
#include <QObject>
#include <QString>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QNetworkAccessManager>
 
class Downloader : public QObject
{
 
public:
    Downloader( )
    {
        m_manager = std::unique_ptr<QNetworkAccessManager>( new QNetworkAccessManager( this ) );
    }
 
    void fetch( const QString &url )
    {
        m_reply.reset( m_manager->get( QNetworkRequest( QUrl( url ) ) ) );
        connect( m_reply.get( ), SIGNAL( finished( ) ),
                 this, SLOT( replyFinished( ) ) );
    }
 
signals:
    void signalWithContent( QString *content );
 
private slots:
    void replyFinished( )
    {
        QByteArray data = m_reply->readAll( );
        QString content( data );
        emit signalWithContent( &content );
    }
 
private:
    std::unique_ptr<QNetworkReply> m_reply;
    std::unique_ptr<QNetworkAccessManager> m_manager;
};
 
#endif // DOWNLOADER_H
 

C++ (Qt)
#ifndef SHOWER_H
#define SHOWER_H
 
#include <QObject>
#include <QString>
#include <QTextCodec>
#include <QByteArray>
#include <QDebug>
 
class Shower : public QObject
{
    Q_OBJECT
 
public slots:
    void show( QString *content )
    {
        qDebug() << *content;
    }
};
 
#endif // SHOWER_H
 

C++ (Qt)
signals:
    void signalWithContent( const QString &content );
 

C++ (Qt)
signals:
    void signalWithContent( QString content );
 

C++ (Qt)
signals:
    void signalWithContent( const QString &content );
 

C++ (Qt)
signals:
    void signalWithContent( QString content );
 

C++ (Qt)
 
void signalWithContent( QString & content );
void signalWithContent( QString * content );