Added support for HTTP redirection in downlaod threadOF

Changelog

@@ -1,6 +1,7 @@
 * Unreleased - Christophe Dumez <chris@qbittorrent.org> - v2.1.3
     - BUGFIX: Fix "Append .!qB extension to complete files" (libtorrent v0.15)
     - BUGFIX: Make sure bandwidth limiting dialogs are centered on screen
+    - BUGFIX: Added support for HTTP redirection
 
 * Sun Jan 24 2010 - Christophe Dumez <chris@qbittorrent.org> - v2.1.2
     - FEATURE: Added back file prioritizing in a torrent

src/downloadthread.cpp

@@ -56,6 +56,18 @@ void downloadThread::processDlFinished(QNetworkReply* reply) {
     // Failure
     emit downloadFailure(url, errorCodeToString(reply->error()));
   } else {
+    QVariant redirection = reply->attribute(QNetworkRequest::RedirectionTargetAttribute);
+    if(redirection.isValid()) {
+      // We should redirect
+      qDebug("Redirecting from %s to %s", url.toLocal8Bit().data(), redirection.toUrl().toString().toLocal8Bit().data());
+      redirect_mapping.insert(redirection.toUrl().toString(), url);
+      downloadUrl(redirection.toUrl().toString());
+      return;
+    }
+    // Checking if it was redirecting, restoring initial URL
+    if(redirect_mapping.contains(url)) {
+      url = redirect_mapping.take(url);
+    }
     // Success
     QString filePath;
     QTemporaryFile tmpfile;

src/downloadthread.h

@@ -33,6 +33,7 @@
 
 #include <QNetworkReply>
 #include <QObject>
+#include <QHash>
 
 class QNetworkAccessManager;
 
@@ -41,6 +42,7 @@ class downloadThread : public QObject {
 
 private:
   QNetworkAccessManager *networkManager;
+  QHash<QString, QString> redirect_mapping;
 
 signals:
   void downloadFinished(QString url, QString file_path);