Add network proxy support (#3687)

src/QGCApplication.cc

@@ -196,6 +196,9 @@ QGCApplication::QGCApplication(int &argc, char* argv[], bool unitTesting)
     setAttribute(Qt::AA_DontCreateNativeWidgetSiblings);
 #endif
 
+    // Setup for network proxy support
+    QNetworkProxyFactory::setUseSystemConfiguration(true);
+
 #ifdef Q_OS_LINUX
 #ifndef __mobile__
     if (!_runningUnitTests) {

src/QGCFileDownload.cc

@@ -12,6 +12,7 @@
 
 #include <QFileInfo>
 #include <QStandardPaths>
+#include <QNetworkProxy>
 
 QGCFileDownload::QGCFileDownload(QObject* parent)
     : QNetworkAccessManager(parent)
@@ -63,6 +64,10 @@ bool QGCFileDownload::download(const QString& remoteFile)
     
     QNetworkRequest networkRequest(remoteUrl);
 
+    QNetworkProxy tProxy;
+    tProxy.setType(QNetworkProxy::DefaultProxy);
+    setProxy(tProxy);
+    
     // Store local file location in user attribute so we can retrieve when the download finishes
     networkRequest.setAttribute(QNetworkRequest::User, localFile);
     

src/QtLocationPlugin/QGCMapUrlEngine.cpp

@@ -41,7 +41,6 @@ UrlFactory::UrlFactory()
         _language = langs[0];
     }
 
-    QNetworkProxyFactory::setUseSystemConfiguration(true);
     // Google version strings
     _versionGoogleMap            = "m@338000000";
     _versionGoogleSatellite      = "198";

src/VehicleSetup/FirmwareUpgradeController.cc

@@ -23,6 +23,7 @@
 #include <QJsonDocument>
 #include <QJsonObject>
 #include <QJsonArray>
+#include <QNetworkProxy>
 
 struct FirmwareToUrlElement_t {
     FirmwareUpgradeController::AutoPilotStackType_t    stackType;
@@ -533,6 +534,10 @@ void FirmwareUpgradeController::_downloadFirmware(void)
     
     _downloadManager = new QNetworkAccessManager(this);
     Q_CHECK_PTR(_downloadManager);
+    QNetworkProxy tProxy;
+    tProxy.setType(QNetworkProxy::DefaultProxy);
+    _downloadManager->setProxy(tProxy);
+
     _downloadNetworkReply = _downloadManager->get(networkRequest);
     Q_ASSERT(_downloadNetworkReply);
     connect(_downloadNetworkReply, &QNetworkReply::downloadProgress, this, &FirmwareUpgradeController::_downloadProgress);