properly resolve all URLs

resources/desktop/com.github.rssguard.appdata.xml

@@ -26,7 +26,7 @@
   <url type="donation">https://github.com/sponsors/martinrotter</url>
   <content_rating type="oars-1.1" />
   <releases>
-    <release version="4.2.2" date="2022-05-04"/>
+    <release version="4.2.2" date="2022-05-06"/>
   </releases>
   <content_rating type="oars-1.0">
     <content_attribute id="violence-cartoon">none</content_attribute>

src/librssguard/gui/feedmessageviewer.cpp

@@ -281,7 +281,8 @@ void FeedMessageViewer::initialize() {
   m_toolBarMessages->setFloatable(false);
   m_toolBarMessages->setMovable(false);
   m_toolBarMessages->setAllowedAreas(Qt::ToolBarArea::TopToolBarArea);
-  m_messagesBrowser->clear();
+
+  // m_messagesBrowser->clear();
 
   // Now refresh visual setup.
   refreshVisualProperties();

src/librssguard/gui/webviewers/qtextbrowser/textbrowserviewer.cpp

@@ -66,19 +66,21 @@ QVariant TextBrowserViewer::loadOneResource(int type, const QUrl& name) {
     return {};
   }
 
-  if (!m_resourcesEnabled || !m_loadedResources.contains(name)) {
+  auto resolved_name = m_currentUrl.isValid() ? m_currentUrl.resolved(name) : name;
+
+  if (!m_resourcesEnabled || !m_loadedResources.contains(resolved_name)) {
     // Resources are not enabled.
     return m_placeholderImage;
   }
 
   // Resources are enabled and we already have the resource.
-  QByteArray resource_data = m_loadedResources.value(name);
+  QByteArray resource_data = m_loadedResources.value(resolved_name);
 
   if (resource_data.isEmpty()) {
     return m_placeholderImageError;
   }
   else {
-    return QImage::fromData(m_loadedResources.value(name));
+    return QImage::fromData(m_loadedResources.value(resolved_name));
   }
 }
 
@@ -439,7 +441,7 @@ void TextBrowserViewer::setHtml(const QString& html, const QUrl& base_url) {
 
     while (i.hasNext()) {
       QRegularExpressionMatch match = i.next();
-      auto captured_url = match.captured(1);
+      auto captured_url = base_url.isValid() ? base_url.resolved(QUrl(match.captured(1))) : QUrl(match.captured(1));
 
       if (!found_resources.contains(captured_url)) {
         found_resources.append(captured_url);

src/librssguard/gui/webviewers/qtextbrowser/textbrowserviewer.h

@@ -90,9 +90,9 @@ class TextBrowserViewer : public QTextBrowser, public WebViewer {
 
   private:
     bool m_resourcesEnabled;
-    QList<QUrl> m_neededResources;
+    QList<QUrl> m_neededResources; // All URLs here must be resolved.
     QScopedPointer<Downloader> m_resourceDownloader;
-    QMap<QUrl, QByteArray> m_loadedResources;
+    QMap<QUrl, QByteArray> m_loadedResources; // All URLs here must be resolved.
     QPixmap m_placeholderImage;
     QPixmap m_placeholderImageError;
 

src/librssguard/network-web/downloader.cpp

@@ -142,6 +142,12 @@ void Downloader::finished() {
 
   m_timer->stop();
 
+  QUrl original_url = reply->property("original_url").toUrl();
+
+  if (!original_url.isValid()) {
+    original_url = reply->request().url();
+  }
+
   // In this phase, some part of downloading process is completed.
   QUrl redirection_url = reply->attribute(QNetworkRequest::RedirectionTargetAttribute).toUrl();
 
@@ -180,6 +186,10 @@ void Downloader::finished() {
     else if (reply_operation == QNetworkAccessManager::DeleteOperation) {
       runDeleteRequest(request);
     }
+
+    if (m_activeReply != nullptr) {
+      m_activeReply->setProperty("original_url", original_url);
+    }
   }
   else {
     // No redirection is indicated. Final file is obtained in our "reply" object.
@@ -204,6 +214,9 @@ void Downloader::finished() {
 
     m_lastContentType = reply->header(QNetworkRequest::ContentTypeHeader);
     m_lastOutputError = reply->error();
+
+    // original_url = m_activeReply->property("original_url").toUrl();
+
     m_activeReply->deleteLater();
     m_activeReply = nullptr;
 
@@ -211,7 +224,7 @@ void Downloader::finished() {
       m_inputMultipartData->deleteLater();
     }
 
-    emit completed(reply->request().url(), m_lastOutputError, m_lastOutputData);
+    emit completed(original_url, m_lastOutputError, m_lastOutputData);
   }
 }