new mthod ping and called from GUI-detection, refs #5

proxyface/autoproxy.hxx

@@ -13,6 +13,7 @@
 #include <QtNetwork/QNetworkAccessManager>
 #include <QtNetwork/QNetworkReply>
 #include <QtNetwork/QSslError>
+#include <QtNetwork/QHostInfo>
 #include <QtCore/QTimer>
 #include <QtCore/QDebug>
 #ifndef Q_OS_WIN32
@@ -111,6 +112,32 @@ namespace proxy {
       //! Get list of proxies for a given URL.
       virtual List proxies(const std::string& url) = 0;
 #ifdef QT_NETWORK_LIB
+      //! Reset, stop all outstanding checks
+      void reset() {
+        _timeout1.stop();
+        _timeout2.stop();
+        for (Requests::iterator it(_requests.begin());
+             it!=_requests.end(); ++it)
+          clean(it->second.first);
+        _requests.clear();
+      }
+      //! Network Ping: Check access to a given address using default proxy.
+      void ping(const std::string& url, int timeout2=30000) {
+        reset();
+        _timeout2.setSingleShot(true);
+        _timeout2.setInterval(timeout2);
+        _url = url;
+        _direct = false; // simulate second try
+        QNetworkProxy defaultProxy;
+        setupProxyCheck(defaultProxy, url);
+        _timeout2.start();
+      }
+      void ping(const QUrl& url, int timeout2=30000) {
+        ping(url.toString().toStdString(), timeout2);
+      }
+      void ping(const QString& url, int timeout2=30000) {
+        ping(url.toStdString(), timeout2);
+      }
       //! If Qt Network is available you may check the proxies found
       /*! First checks for direct access to the target. If this is not
           possible, starts scan for proxies.
@@ -127,11 +154,8 @@ namespace proxy {
         PROXYFACE_LOG;
         qDebug()<<"Search proxy for URL, direct and default"
                 <<"url="<<url.data()<<"timeout1="<<timeout1;
+        reset();
         _url = url;
-        for (Requests::iterator it(_requests.begin());
-             it!=_requests.end(); ++it)
-          clean(it->second.first);
-        _requests.clear();
         _direct = true; // first try direct access
         QNetworkProxy directProxy(QNetworkProxy::NoProxy);
         setupProxyCheck(directProxy, url);
@@ -238,21 +262,12 @@ namespace proxy {
     private Q_SLOTS:
       void timeout() {
         PROXYFACE_LOG;
-        _timeout1.stop();
-        _timeout2.stop();
-        std::string url;
-        for (Requests::iterator it(_requests.begin());
-             it!=_requests.end(); ++it) {
-          url = it->first->url().toString().toStdString();
-          clean(it->second.first);
-        }
-        _requests.clear();
-        qDebug()<<"Proxy detection timed out"<<"url="<<url.data();
-        if (_direct && url.size()) {
+        reset();
+        qDebug()<<"Proxy detection timed out"<<"url="<<_url.data();
+        if (_direct) {
           qDebug()<<"Direct or preconfigured proxy not available,"
             " try autoproxy negotiation";
           _direct = false;
-          _url = url;
 #ifndef Q_OS_WIN32
           start(); // autoproxy detection in own thread
 #else
@@ -272,14 +287,9 @@ namespace proxy {
                          toString(_requests[reply].second));
           return; // wait for timeout
         }
-        _timeout1.stop();
-        _timeout2.stop();
         QNetworkProxy prxy(_requests[reply].second);
         QUrl url(reply->url());
-        for (Requests::iterator it(_requests.begin());
-             it!=_requests.end(); ++it)
-          clean(it->second.first);
-        _requests.clear();
+        reset();
         qDebug()<<"SUCCESS - Valid proxy found for url:"
                 <<"url="<<url<<"proxy="<<toString(prxy);
         proxyFound(url, prxy);

proxyface/proxy.hxx

@@ -42,34 +42,47 @@ namespace gui {
                                                QString, QString)),
                  SIGNAL(temporaryError(QNetworkReply::NetworkError,
                                        QString, QString)));
-         accept();
+         acceptValues();
        }
       
       void checkUrl(const QString& url) {
         _testUrl = url;
-        accept();
+        acceptValues();
+      }
+
+      void retry() {
+        acceptValues(true);
       }
       
-      void acceptValues() {
+      void acceptValues(bool retry=false) {
+        _auto.reset();
         QNetworkProxy::ProxyType type(QNetworkProxy::NoProxy);
         switch (_type->currentIndex()) {
-          case 0: {
+          case 0: try {
             _url->setEnabled(false);
             _port->setEnabled(false);
             type=QNetworkProxy::NoProxy;
+            _auto.proxy(_testUrl);
+          } catch (...) {} break;
+          case 1: {
+            type=QNetworkProxy::HttpProxy;
+            QNetworkProxy::setApplicationProxy
+              (QNetworkProxy(type, _url->text(), _port->value()));
+            _auto.ping(_testUrl);
+          } break;
+          case 2: {
+            type=QNetworkProxy::Socks5Proxy;
+            QNetworkProxy::setApplicationProxy
+              (QNetworkProxy(type, _url->text(), _port->value()));
+            _auto.ping(_testUrl);
           } break;
-          case 1: type=QNetworkProxy::HttpProxy; break;
-          case 2: type=QNetworkProxy::Socks5Proxy; break;
         }
-        QNetworkProxy::setApplicationProxy
-          (QNetworkProxy(type, _url->text(), _port->value()));
-        try {
-          _auto.proxy(_testUrl);
-        } catch (...) {}
+        if (!retry) detecting();
       }
       
     Q_SIGNALS:
-          
+
+      void detecting();
       void proxyFound(const QUrl&, const QNetworkProxy&);
       void proxyError(QNetworkReply::NetworkError);
       void temporaryError(QNetworkReply::NetworkError, QString, QString);      
@@ -77,9 +90,13 @@ namespace gui {
     public Q_SLOTS:
                     
       void proxyFoundSlot(const QUrl&, const QNetworkProxy& p) {
-        QNetworkProxy::setApplicationProxy(p);
-        _url->setText(p.hostName());
-        _port->setValue(p.port());
+        QNetworkProxy prx(p.type()==QNetworkProxy::DefaultProxy
+                          ?QNetworkProxy::applicationProxy():p);
+        if (prx.type()==QNetworkProxy::DefaultProxy) return;
+        _url->setText(prx.hostName());
+        _port->setValue(prx.port());
+        if (p.type()==QNetworkProxy::DefaultProxy) return;
+        QNetworkProxy::setApplicationProxy(prx);
       }
       
       void on__type_currentIndexChanged(int index) {