Updating an AppImage using Proxy

This guide Demonstrates how to use the AppImageUpdaterBridge APIs for updating a single AppImage file through a given proxy. This example parses the path from the program arguments , And uses the AppImageDeltaRevisioner class to perform the actual delta update.

main.cpp

#include <QCoreApplication>
#include <QDebug>
#include <AppImageUpdaterBridge>
#include <QNetworkProxy> 

int main(int ac , char **av)
{
    if(ac == 1){
        qInfo() << "Usage: " << av[0] << " [APPIMAGE PATH]";
        return 0;   
        }
    
    using AppImageUpdaterBridge::AppImageDeltaRevisioner;
    using AppImageUpdaterBridge::errorCodeToString;
    QCoreApplication app(ac , av);
    QString AppImagePath = QString(av[1]);

    /* Set proxy settings */
    QNetworkProxy proxy;
    /* For this demo , we assume we use a local tor instance. */
    proxy.setType(QNetworkProxy::Socks5Proxy);
    proxy.setHostName("127.0.0.1");
    proxy.setPort(9050);

    AppImageDeltaRevisioner DRevisioner(AppImagePath);
    QObject::connect(&DRevisioner , &AppImageDeltaRevisioner::finished ,
        [&](QJsonObject newVersionDetails , QString oldVersionPath){
        (void)oldVersionPath;
        qInfo() << "New Version Details:: " << newVersionDetails;
        app.quit();
    });
    QObject::connect(&DRevisioner , &AppImageDeltaRevisioner::error ,
        [&](short e){
        qInfo() << "error:: " << errorCodeToString(e);
        app.quit();
    });
    DRevisioner.setShowLog(true); // Display log
        
    /* Using proxy. */
    DRevisioner.setProxy(proxy);
    
    DRevisioner.start(); /* Start the update. */
    return app.exec();
}
 

update.pro

include(AppImageUpdaterBridge/AppImageUpdaterBridge.pri)
TEMPLATE = app
TARGET = update
SOURCES += main.cpp

Compilation and Execution

 $ mkdir build
 $ cd build
 $ qmake ..
 $ make -j$(nproc)
 $ ./update some.AppImage

A advanced verison of this program has been implemented in the examples directory.