How to debug a failed feed fetch?

[brezelman]

Hi, the feeds of a site called Geneanet (https://de.geneanet.org/nachrichten/category/kniffe_und_tricks_fur_geneanet/feed) fail to fetch in RSS Guard with (http?) error "access denied" (403?). I can read the feed via Browser without problem. I tried to change the User-Agent to the one of my browser, without success. So I wanted to check the differences in the HTTP request, but I couldn't find a possibility to read the HTTP request/response, even in the enabled logs. It just says:

time=" 13.314" type="warning" -> core: Error 'QNetworkReply::ContentAccessDenied' during fetching of new messages for feed 'https://de.geneanet.org/nachrichten/category/kniffe_und_tricks_fur_geneanet/feed'.
time=" 13.315" type="critical" -> network: Error when fetching feed: 'Feed::Status::NetworkError' message: 'Zugriff auf Inhalte wurde verweigert'.

Which is, what I already knew by the shown error message. So the question is: Is there a way to debug the HTTP request/response data? If yes, how?

[brezelman]

Well, I added all the HTTP Headers my firefox was sending and it was still not working. Then I enabled HTTP/2 in the settings, and that was actually it. So, trial and error got me to the solution here. Still a way to get a detailed debug log would be great.