https tracker url not supported

[DJPlaya]

This is a Problem i do get when using recent Torrents on privat Trackers.
Info:

https://i.imgur.com/o56uof8.png

[ygrek]

please include text version, I am not going to transcribe hashes from screenshot

[ygrek]

apparently mldonkey does not support https tracker urls

[J-Siu]

I believe not only tracker, but https torrent links are also affected. I tried following:

https://releases.ubuntu.com/20.04/ubuntu-20.04-live-server-amd64.iso.torrent

mldonkey seems not able to fetch the torrent file.

[HinTak]

Any progress on this? It certainly looks like many ISPs are implementing filtering of bittorrent traffic, regardless of / even for obviously legitimate usage like large Linux distro isos.

[ygrek]

I would think the best way to solve it is to use ocurl library but I don't have immediate plan to work on it

[carlonluca]

@ygrek if I wanted to use ocurl to support HTTPS, how would you suggest to do it in mldonkey? I see that ocurl includes sync calls. But mldonkey download is async. I thought I could use threads, but I see that mldonkey does not use threads. In ocurl I see there is the multi module, is that what you would use?
Thanks.

[ygrek]

Long term should switch to lwt but there is a lot of networking code so it is not possible to switch quickly.
I think best short-term would be to use a pool of threads for ocurl synchronous calls.

[carlonluca]

I thought about that, but in that case the callback would be called in the new thread. I have no experience with ocaml, but I read this:

Only one thread at a time is allowed to run OCaml code on a particular domain ‍9.5.1.

So I'm not entirely sure this is a problem. What do you think? Should I somehow call the callback in the thread of the caller? Can I do that somehow?
Thanks for your answer.

[ygrek]

this is fine, no need to do anything special, one thread at a time actually makes it easier because no need to worry about mutexes or anything :)

[carlonluca]

Hello @ygrek,
while working on this I met a problem. Could you please have a look at #125?

[carlonluca]

Hello @ygrek ,
found another small issue while working on this: #126. Could you please have a look?

[carlonluca]

For those interested, I uploaded a few patches to a branch in my mldonkey fork that should add support for https, https trackers and for downloading torrent files: https://github.com/carlonluca/mldonkey/commits/feature/curl/.

Unfortunately, torrents still do not seem to start for me. If there is someone else who wants to try, please let me know the result.