some smaller fixes and improvements for joomla testing

src/commands.hxx

@@ -1548,6 +1548,8 @@ class Download: public Command {
     }
     bool execute(Script* script, QWebFrame* frame) {
       Logger log(this, script);
+      _realfilename = script->replacevars(_filename);
+      log("REALFILENAME="+_realfilename);
       frame->page()->setForwardUnsupportedContent(true);
       connect(frame->page(), SIGNAL(unsupportedContent(QNetworkReply*)),
               this, SLOT(unsupportedContent(QNetworkReply*)));
@@ -1577,11 +1579,9 @@ class Download: public Command {
       _filesuccess = filesuccess;
     }
     void unsupportedContent(QNetworkReply* reply) {
+      if (!_realfilename.size()) {
         _realfilename = reply->url().toString().split('/').last();
-      if (_filename.size())
-        _realfilename = _filename;
-      else if (reply->header(QNetworkRequest::ContentDispositionHeader)
-               .isValid()) {
+        if (reply->header(QNetworkRequest::ContentDispositionHeader).isValid()) {
           QString part(reply->header(QNetworkRequest::ContentDispositionHeader)
                        .toString());
           if (part.contains(QRegularExpression("attachment; *filename="))) {
@@ -1589,6 +1589,7 @@ class Download: public Command {
             if (part.size()) _realfilename = part;
           }
         }
+      }
       connect(new RunDownload(reply, _realfilename),
               SIGNAL(completed(bool, bool)), SLOT(completed(bool, bool)));
     }