handle non-torrent RSS link

Author: vafada

src/webui/api/torrentscontroller.cpp

@@ -2231,6 +2231,11 @@ void TorrentsController::fetchMetadataAction()
     // http(s) url
     else if (Net::DownloadManager::hasSupportedScheme(source))
     {
+        if (m_invalidTorrentSource.contains(source))
+        {
+            throw APIError(APIErrorType::BadData, tr("'%1' is not a valid torrent file.").arg(source));
+        }
+
         if (!m_requestedTorrentSource.contains(source))
         {
             if (!downloaderParam.isEmpty())
@@ -2444,10 +2449,12 @@ void TorrentsController::cacheTorrentFile(const QString &source, const QByteArra
         const BitTorrent::InfoHash infoHash = torrentDescr.infoHash();
         m_torrentSourceCache.insert(source, infoHash);
         m_torrentMetadataCache.insert(infoHash.toTorrentID(), torrentDescr);
+        m_invalidTorrentSource.remove(source);
     }
     else
     {
         LogMsg(tr("Parse torrent failed. URL: \"%1\". Error: \"%2\".").arg(source, loadResult.error()), Log::WARNING);
+        m_invalidTorrentSource.insert(source);
         m_torrentSourceCache.remove(source);
     }
 }

src/webui/api/torrentscontroller.h

@@ -130,4 +130,5 @@ private slots:
     QHash<QString, BitTorrent::InfoHash> m_torrentSourceCache;
     QHash<BitTorrent::TorrentID, BitTorrent::TorrentDescriptor> m_torrentMetadataCache;
     QSet<QString> m_requestedTorrentSource;
+    QSet<QString> m_invalidTorrentSource;
 };

src/webui/www/private/scripts/addtorrent.js

@@ -278,6 +278,9 @@ window.qBittorrent.AddTorrent ??= (() => {
             .then(async (response) => {
                 if (!response.ok) {
                     metadataFailed();
+                    if (response.status === 415) {
+                        alert(await response.text());
+                    }
                     return;
                 }