- Improved a lot downloading from url using libcommoncpp2 instead of libcurl

- TODO soon:
  - Updated configure file
	- Add url download error handling

Changelog

@@ -24,6 +24,7 @@
     - FEATURE: Real torrent share ratio is now displayed in transfer list
     - FEATURE: Added keyboard shortcuts for main actions (see wiki)
     - FEATURE: Added a popup menu to set priority for multiple fies at once
+    - FEATURE: Improved a lot downloading from urls (using libcommoncpp2 instead of libcurl)
     - I18N: Added Hungarian translation
     - BUGFIX: Progress of paused torrents is now correct on restart
     - BUGFIX: Progress column gets sorted on restart it is was during last execution

TODO

@@ -42,9 +42,8 @@
 - update sorting when a new torrent is added?
 - Allow to hide columns (gtsoul)
 - Complete documentation and english translation
-- Fix downloader thread (again). Try to use another lib than libcurl:
-    - libcommoncpp has a URLStream class. This C++ class allow you to download a file using HTTP. See demo/urlfetch.cpp in commoncpp2-1.3.19.tar.gz
 * beta2
+  - Fix configure file for libcommoncpp
   - Wait for some bug fixes in libtorrent :
     - upload/download limit per torrent
     - ipfilter crash

src/bittorrent.cpp

@@ -50,7 +50,7 @@ bittorrent::bittorrent(){
   ETARefresher.start(6000);
   // To download from urls
   downloader = new downloadThread(this);
-  connect(downloader, SIGNAL(downloadFinished(const QString&, const QString&, int, const QString&)), this, SLOT(processDownloadedFile(const QString&, const QString&, int, const QString&)));
+  connect(downloader, SIGNAL(downloadFinished(const QString&, const QString&)), this, SLOT(processDownloadedFile(const QString&, const QString&)));
 }
 
 // Main destructor
@@ -1013,13 +1013,13 @@ void bittorrent::downloadFromUrl(const QString& url){
 }
 
 // Add to bittorrent session the downloaded torrent file
-void bittorrent::processDownloadedFile(const QString& url, const QString& file_path, int return_code, const QString& errorBuffer){
-  if(return_code){
-    // Download failed
-    emit downloadFromUrlFailure(url, errorBuffer);
-    QFile::remove(file_path);
-    return;
-  }
+void bittorrent::processDownloadedFile(const QString& url, const QString& file_path){
+//   if(return_code){
+//     // Download failed
+//     emit downloadFromUrlFailure(url, errorBuffer);
+//     QFile::remove(file_path);
+//     return;
+//   }
   // Add file to torrent download list
   emit newDownloadedTorrent(file_path, url);
 }

src/bittorrent.h

@@ -136,7 +136,7 @@ class bittorrent : public QObject{
     void cleanDeleter(deleteThread* deleter);
     void scanDirectory();
     void readAlerts();
-    void processDownloadedFile(const QString&, const QString&, int, const QString&);
+    void processDownloadedFile(const QString&, const QString&);
     void resumeUnfinished();
     bool loadTrackerFile(const QString& hash);
     void saveTrackerFile(const QString& hash);

src/downloadThread.h

@@ -28,11 +28,15 @@
 #include <QMutex>
 #include <QMutexLocker>
 #include <QWaitCondition>
-#include <curl/curl.h>
 #include <iostream>
-
+#include <cc++/common.h>
 #include "misc.h"
 
+#ifdef  CCXX_NAMESPACES
+using namespace std;
+using namespace ost;
+#endif
+
 class downloadThread : public QThread {
   Q_OBJECT
 
@@ -41,9 +45,10 @@ class downloadThread : public QThread {
     QMutex mutex;
     QWaitCondition condition;
     bool abort;
+    URLStream url_stream;
 
   signals:
-    void downloadFinished(const QString& url, const QString& file_path, int return_code, const QString& errorBuffer);
+    void downloadFinished(const QString& url, const QString& file_path);
 
   public:
     downloadThread(QObject* parent) : QThread(parent){
@@ -84,80 +89,41 @@ class downloadThread : public QThread {
           QString url = url_list.takeFirst();
           mutex.unlock();
 	  qDebug("In Download thread RUN, mutex unlocked (got url)");
-          CURL *curl;
-          QString filePath;
-          int return_code, response;
           // XXX: Trick to get a unique filename
-          QTemporaryFile *tmpfile = new QTemporaryFile;
+          QString filePath;
+          QTemporaryFile *tmpfile = new QTemporaryFile();
           if (tmpfile->open()) {
             filePath = tmpfile->fileName();
           }
           delete tmpfile;
-          if(abort)
-            return;
-          FILE *file = fopen((const char*)filePath.toUtf8(), "w");
-          if(!file){
-            std::cerr << "Error: could not open temporary file...\n";
-            return;
+          QFile dest_file(filePath);
+          if(!dest_file.open(QIODevice::WriteOnly | QIODevice::Text)){
+            std::cerr << "Error: could't create temporary file: " << (const char*)filePath.toUtf8() << '\n';
+            continue;
           }
-          // Initilization required by libcurl
-          curl = curl_easy_init();
-          if(!curl){
-            std::cerr << "Error: Failed to init curl...\n";
-            fclose(file);
-            return;
+          URLStream::Error status = url_stream.get((const char*)url.toUtf8());
+          if(status){
+            // Failure
+            //TODO: handle this
+            QString error_msg = QString(misc::toString(status).c_str());
+            qDebug("Download failed for %s, reason: %s", (const char*)url.toUtf8(), (const char*)error_msg.toUtf8());
+            url_stream.close();
+            continue;
           }
-          // Set url to download
-          curl_easy_setopt(curl, CURLOPT_URL, url.toLocal8Bit().constData());
-          qDebug("Url: %s", url.toLocal8Bit().constData());
-          // Define our callback to get called when there's data to be written
-          curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, misc::my_fwrite);
-          // Set destination file
-          curl_easy_setopt(curl, CURLOPT_WRITEDATA, file);
-          // Some SSL mambo jambo
-          curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, FALSE);
-          curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
-	  // Disable progress meter
-	  curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 1);
-	  // Any kind of authentication
-	  curl_easy_setopt(curl, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
-          //curl_easy_setopt(curl, CURLOPT_VERBOSE, 1);
-	  // Auto referrer
-	  curl_easy_setopt(curl, CURLOPT_AUTOREFERER, 1);
-	  // Follow redirections
-	  curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
-	  // Enable cookies
-	  curl_easy_setopt(curl, CURLOPT_COOKIEFILE, "");
-          // We want error message:
-          char errorBuffer[CURL_ERROR_SIZE];
-	  errorBuffer[0]=0; /* prevent junk from being output */
-          return_code = curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, errorBuffer);
-          if(return_code){
-            std::cerr << "Error: failed to set error buffer in curl\n";
-            fclose(file);
-            QFile::remove(filePath);
-            return;
+          qDebug("Downloading %s...", (const char*)url.toUtf8());
+          char cbuf[1024];
+          int len;
+          while(!url_stream.eof()) {
+            url_stream.read(cbuf, sizeof(cbuf));
+            len = url_stream.gcount();
+            if(len > 0){
+              dest_file.write(cbuf, len);
             }
-	  unsigned short retries = 0;
-	  bool to_many_users = false;
-	  do{
-	    // Perform Download
-	    return_code = curl_easy_perform(curl);
-	    // We want HTTP response code
-	    curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response);
-            qDebug("HTTP response code: %d", response);
-	    if(response/100 == 5){
-	      to_many_users = true;
-	      ++retries;
-	      SleeperThread::msleep(1000);
           }
-	  }while(to_many_users && retries < 10 && response!=0);
-          // Cleanup
-          curl_easy_cleanup(curl);
-          // Close tmp file
-          fclose(file);
-          emit downloadFinished(url, filePath, return_code, QString(errorBuffer));
-	  qDebug("In Download thread RUN, signal emitted, ErrorBuffer: %s", errorBuffer);
+          dest_file.close();
+          url_stream.close();
+          emit downloadFinished(url, filePath);
+	  qDebug("In Download thread RUN, signal emitted");
         }else{
           qDebug("In Download thread RUN, mutex still locked (no urls) -> sleeping");
           condition.wait(&mutex);

src/rss.h

@@ -137,21 +137,21 @@ class RssStream : public QObject{
 
   public slots :
     // read and store the downloaded rss' informations
-    void processDownloadedFile(const QString&, const QString& file_path, int return_code, const QString&) {
+    void processDownloadedFile(const QString&, const QString& file_path) {
       // delete the former file
       if(QFile::exists(filePath)) {
         QFile::remove(filePath);
       }
       filePath = file_path;
-      if(return_code){
-        // Download failed
-	qDebug("(download failure) "+file_path.toUtf8());
-	if(QFile::exists(filePath)) {
-	  QFile::remove(filePath);
-	}
-	emit refreshFinished(url, NEWS);
-	return;
-      }
+//       if(return_code){
+//         // Download failed
+// 	qDebug("(download failure) "+file_path.toUtf8());
+// 	if(QFile::exists(filePath)) {
+// 	  QFile::remove(filePath);
+// 	}
+// 	emit refreshFinished(url, NEWS);
+// 	return;
+//       }
       openRss();
       emit refreshFinished(url, NEWS);
     }
@@ -189,7 +189,7 @@ class RssStream : public QObject{
       read = true;
       downloaderRss = new downloadThread(this);
       downloaderIcon = new downloadThread(this);
-      connect(downloaderRss, SIGNAL(downloadFinished(const QString&, const QString&, int, const QString&)), this, SLOT(processDownloadedFile(const QString&, const QString&, int, const QString&)));
+      connect(downloaderRss, SIGNAL(downloadFinished(const QString&, const QString&)), this, SLOT(processDownloadedFile(const QString&, const QString&)));
       downloaderRss->downloadUrl(url);
       // XXX: remove it when gif can be displayed
       iconPath = ":/Icons/rss.png";
@@ -216,7 +216,6 @@ class RssStream : public QObject{
     }
 
     void refresh() {
-      connect(downloaderRss, SIGNAL(downloadFinished(const QString&, const QString&, int, const QString&)), this, SLOT(processDownloadedFile(const QString&, const QString&, int, const QString&)));
       downloaderRss->downloadUrl(url);
       lastRefresh.start();
     }

src/src.pro

@@ -2,6 +2,9 @@
 LANG_PATH = lang
 ICONS_PATH = Icons
 
+LIBS += -lccext2 
+LIBS += -lccgnu2
+
 #Set the following variable to 1 to enable debug
 DEBUG_MODE = 1