List available proxies on start

MultiMC.cpp

@@ -152,6 +152,46 @@ MultiMC::MultiMC(int &argc, char **argv) : QApplication(argc, argv)
 	// set up a basic autodetected proxy (system default)
 	QNetworkProxyFactory::setUseSystemConfiguration(true);
 
+	QLOG_INFO() << "Detecting system proxy settings...";
+	auto proxies = QNetworkProxyFactory::systemProxyForQuery();
+	if (proxies.size() == 1 && proxies[0].type() == QNetworkProxy::NoProxy)
+	{
+		QLOG_INFO() << "No proxy found.";
+	}
+	else for (auto proxy : proxies)
+	{
+		QString proxyDesc;
+		if (proxy.type() == QNetworkProxy::NoProxy)
+		{
+			QLOG_INFO() << "Using no proxy is an option!";
+			continue;
+		}
+		switch (proxy.type())
+		{
+		case QNetworkProxy::DefaultProxy:
+			proxyDesc = "Default proxy: ";
+			break;
+		case QNetworkProxy::Socks5Proxy:
+			proxyDesc = "Socks5 proxy: ";
+			break;
+		case QNetworkProxy::HttpProxy:
+			proxyDesc = "HTTP proxy: ";
+			break;
+		case QNetworkProxy::HttpCachingProxy:
+			proxyDesc = "HTTP caching: ";
+			break;
+		case QNetworkProxy::FtpCachingProxy:
+			proxyDesc = "FTP caching: ";
+			break;
+		}
+		proxyDesc += QString("%3@%1:%2 pass %4")
+						 .arg(proxy.hostName())
+						 .arg(proxy.port())
+						 .arg(proxy.user())
+						 .arg(proxy.password());
+		QLOG_INFO() << proxyDesc;
+	}
+
 	// create the global network manager
 	m_qnam.reset(new QNetworkAccessManager(this));
 
@@ -354,7 +394,7 @@ std::shared_ptr<JavaVersionList> MultiMC::javalist()
 	return m_javalist;
 }
 
-int main_gui(MultiMC & app)
+int main_gui(MultiMC &app)
 {
 	// show main window
 	MainWindow mainWin;