cppCORE/ProxyDataService.cpp at master · marc-sturm/cppCORE · GitHub

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#include "ProxyDataService.h"
#include "Settings.h"
#include "Exceptions.h"
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QTimer>
#include <QEventLoop>

ProxyDataService::ProxyDataService()
{
	//test no proxy
	if(test_connection(QNetworkProxy(QNetworkProxy::NoProxy)))
	{
		proxy_ = QNetworkProxy(QNetworkProxy::NoProxy);
		return;
	}


	//test system proxy
	QNetworkProxyQuery npq(QUrl("http://www.google.com"));
	QList<QNetworkProxy> system_proxies = QNetworkProxyFactory::systemProxyForQuery(npq);
	if(system_proxies.size() > 0)
	{
		foreach(const QNetworkProxy system_proxy, system_proxies)
		{
			//debug
			if(test_connection(system_proxy))
			{
				proxy_ = system_proxy;
				return;
			}
		}
	}


	//test proxy from ini
	QNetworkProxy tmp_proxy;
	tmp_proxy.setType(QNetworkProxy::HttpProxy);
	tmp_proxy.setHostName(Settings::string("proxy_host"));
	tmp_proxy.setPort(Settings::integer("proxy_port"));
	tmp_proxy.setUser(Settings::string("proxy_user", true));
	tmp_proxy.setPassword(Settings::string("proxy_password", true));

	if(test_connection(tmp_proxy))
	{
		proxy_ = tmp_proxy;

		return;
	}

	if(tmp_proxy.password().isEmpty() || tmp_proxy.user().isEmpty())
	{
		proxy_ = tmp_proxy;

		return;
	}

	THROW(NetworkException, "Proxy settings provided, but couldn't connect to the internet.")
}

bool ProxyDataService::setCredentials(QString user, QString password)
{
	ProxyDataService& service = instance();
	QNetworkProxy tmp_proxy;
	tmp_proxy.setType(QNetworkProxy::HttpProxy);
	tmp_proxy.setHostName(service.proxy_.hostName());
	tmp_proxy.setPort(service.proxy_.port());
	tmp_proxy.setUser(user);
	tmp_proxy.setPassword(password);

	if(test_connection(tmp_proxy))
	{
		service.proxy_ = tmp_proxy;
		return true;
	}

	return false;
}

const QNetworkProxy& ProxyDataService::getProxy()
{
	ProxyDataService& service = instance();
	return service.proxy_;
}

bool ProxyDataService::isConnected()
{
	QNetworkProxy proxy = getProxy();
	return test_connection(proxy);
}

ProxyDataService& ProxyDataService::instance()
{
	static ProxyDataService service;
	return service;
}

bool ProxyDataService::test_connection(QNetworkProxy proxy)
{
	QNetworkAccessManager network_manager;
	network_manager.setProxy(proxy);
	QNetworkReply* reply = network_manager.get(QNetworkRequest(QUrl("https://www.google.com")));

	//make the loop process the reply immediately
	QEventLoop loop;
	connect(reply, SIGNAL(finished()), &loop, SLOT(quit()));

	// add shorter time out for NoProxy check
	QTimer timeout_timer;
	if(proxy.type() == QNetworkProxy::NoProxy)
	{
		timeout_timer.setSingleShot(true);
		connect(&timeout_timer, SIGNAL(timeout()), &loop, SLOT(quit()));
		timeout_timer.start(3000);
	}

	loop.exec();

	if((proxy.type() == QNetworkProxy::NoProxy) && !timeout_timer.isActive())
	{
		// reply ran in time out
		return false;
	}

	return (reply->error() == QNetworkReply::NoError);
}