Reenable bootstrapping of torrent DHTs

Enable setting of overwrite settings for download files

apps/Launcher/syncwidget.cpp

@@ -119,7 +119,11 @@ SyncWidget::SyncWidget(QWidget* parent, Qt::WindowFlags f)
     }
     _session->start_upnp();
     _session->start_dht();
-    
+
+    _session->add_dht_router({ "dht.transmissionbt.com", 6881});
+    _session->add_dht_router({ "router.bittorrent.com", 6881});
+    _session->add_dht_router({ "router.utorrent.com", 6881 });
+    _session->add_dht_router({ "router.bitcomet.com", 6881 });
 
     QTimer* timer = new QTimer(this);
     QObject::connect(timer, SIGNAL(timeout()), this, SLOT(handleTimer()));
@@ -160,17 +164,21 @@ void SyncWidget::clear() {
 void SyncWidget::handleDirectFiles() {
     qDebug() << "Direct Files";
     for (const DirectFile& f : _directFiles) {
-        InfoWidget* w = new InfoWidget(f.destination);
-        _downloadLayout->addWidget(w);
 
         qDebug() << f.url << " -> " << f.destination;
 
         openspace::DownloadManager::FileFuture* future = DlManager.downloadFile(
             f.url.toStdString(),
-            fullPath(f.module, f.destination).toStdString()
+            fullPath(f.module, f.destination).toStdString(),
+            false
         );
-        _futures.push_back(future);
-        _futureInfoWidgetMap[future] = w;
+        if (future) {
+            InfoWidget* w = new InfoWidget(f.destination);
+            _downloadLayout->addWidget(w);
+
+            _futures.push_back(future);
+            _futureInfoWidgetMap[future] = w;
+        }
     }
 }
 
@@ -186,7 +194,8 @@ void SyncWidget::handleFileRequest() {
             DlManager.downloadRequestFiles(
                 identifier,
                 path,
-                version
+                version,
+                false
             );
 
         _futures.insert(_futures.end(), futures.begin(), futures.end());

include/openspace/engine/downloadmanager.h

@@ -57,6 +57,7 @@ public:
     FileFuture* downloadFile(
         const std::string& url,
         const ghoul::filesystem::File& file,
+        bool overrideFile = true,
         DownloadFinishedCallback finishedCallback = DownloadFinishedCallback(),
         DownloadProgressCallback progressCallback = DownloadProgressCallback()
     );
@@ -65,6 +66,7 @@ public:
         const std::string& identifier,
         const ghoul::filesystem::Directory& destination,
         int version,
+        bool overrideFiles = true,
         DownloadFinishedCallback finishedCallback = DownloadFinishedCallback(),
         DownloadProgressCallback progressCallback = DownloadProgressCallback()
     );

src/engine/downloadmanager.cpp

@@ -106,9 +106,13 @@ DownloadManager::DownloadManager(std::string requestURL, int applicationVersion)
 DownloadManager::FileFuture* DownloadManager::downloadFile(
     const std::string& url,
     const ghoul::filesystem::File& file,
+    bool overrideFile,
     DownloadFinishedCallback finishedCallback,
     DownloadProgressCallback progressCallback)
 {
+    if (!overrideFile && FileSys.fileExists(file))
+        return nullptr;
+
     FileFuture* future = new FileFuture(
         file.filename()
     );
@@ -154,6 +158,7 @@ std::vector<DownloadManager::FileFuture*> DownloadManager::downloadRequestFiles(
     const std::string& identifier,
     const ghoul::filesystem::Directory& destination,
     int version,
+    bool overrideFiles,
     DownloadFinishedCallback finishedCallback,
     DownloadProgressCallback progressCallback)
 {
@@ -171,7 +176,7 @@ std::vector<DownloadManager::FileFuture*> DownloadManager::downloadRequestFiles(
     LDEBUG("Request File: " << requestFile);
 
     bool isFinished = false;
-    auto callback = [&futures, destination, &progressCallback, &isFinished, requestFile](const FileFuture& f) {
+    auto callback = [&futures, destination, &progressCallback, &isFinished, requestFile, overrideFiles](const FileFuture& f) {
         LDEBUG("Finished: " << requestFile);
         std::ifstream temporary(requestFile);
         std::string line;
@@ -185,9 +190,11 @@ std::vector<DownloadManager::FileFuture*> DownloadManager::downloadRequestFiles(
 
             FileFuture* future = DlManager.downloadFile(
                 line,
-                destination.path() + "/" + file
+                destination.path() + "/" + file,
+                overrideFiles
             );
-            futures.push_back(future);
+            if (future)
+                futures.push_back(future);
         }
         isFinished = true;
     };
@@ -195,6 +202,7 @@ std::vector<DownloadManager::FileFuture*> DownloadManager::downloadRequestFiles(
     FileFuture* f = downloadFile(
         fullRequest,
         requestFile,
+        true,
         callback
     );