Matrix failed media with MSC3916 "Authentication for media"

[mahdi1234]

With recent switch on many matrix servers to authenticated media, matterbridge doesn't handle it correctly anymore even when Media server set. With v1.26.0

time="2024-09-06T13:23:47+02:00" level=debug msg="== Receiving event: &gomatrix.Event{StateKey:(*string)(nil), Sender:"@someaccount:matrix.org", Type:"m.room.message", Timestamp:1725621827645, ID:"$someid", RoomID:"!someroom:matrix.org", Redacts:"", Unsigned:map[string]interface {}{"age":301, "membership":"join"}, Content:map[string]interface {}{"body":"barcode.gif", "info":map[string]interface {}{"h":100, "mimetype":"image/gif", "size":1676, "w":100, "xyz.amorgan.blurhash":"xyz"}, "m.mentions":map[string]interface {}{}, "msgtype":"m.image", "url":"mxc://matrix.org/someurl"}, PrevContent:map[string]interface {}(nil)}" func=handleEvent file="bridge/matrix/matrix.go:484" prefix=matrix
time="2024-09-06T13:23:48+02:00" level=debug msg="Trying to download "barcode.gif" with size 1676" func=HandleDownloadSize file="bridge/helper/helper.go:162" prefix=matrix
time="2024-09-06T13:23:48+02:00" level=debug msg="Download OK "barcode.gif" 45" func=HandleDownloadData2 file="bridge/helper/helper.go:183" prefix=matrix

In the snippet above, there was image called barcode.gif with size of 1676 bytes posted, but in reality only 45 bytes downloaded.

Content of that file shows it wasn't properly authenticated.

cat ./barcode.gif 
{"errcode":"M_NOT_FOUND","error":"Not found"}

Here's some context:
matrix-org/matrix-spec-proposals#3916
https://matrix.org/blog/2024/06/26/sunsetting-unauthenticated-media/

[Vetgans]

Can confirm.

I can still receive images, but not send them anymore.

[loviuz]

It seem related to #2205

[MoralCode]

Content of that file shows it wasn't properly authenticated.

Do you mean it wasn't authenticated at all? or just that the authentication was done improperly?

[MoralCode]

I wonder if this has to do with the underlying matrix client library not being updated to a version that supports this authentication

Edit: yep it looks like the underlying library behind matterbridge/gomatrix is archived:

https://github.com/matrix-org/gomatrix

[MoralCode]

this seems to be a more maintained golang library: https://github.com/mautrix/go

[leecher1337]

Now this has been broken for over 6 months, unfortunately. Do you know any alternative bridges that don't have this issue?
Or any forks that were able to replace the golang library?
Not being able to view media on IRC is really annoying and as this in written in golang and not in C, so I'm not able to fix it by myself.

[c-holtermann]

I've just realized that I duplicated #2225 with #2227. (edited, #2228 is a different matter).

[antonizoon]

It looks like either of the following pull requests should fix this problem now. I tested and only merged #2225 since its simpler.

#2225

#2227

I'm going to start maintaining a fork of matterbridge to accept and merge pull requests regarding irc -> matrix -> discord since our organization needs this bridge to work.

However, I can only test irc -> matrix -> discord so will need more people to help provide pull requests proven to fix the whatsapp and telegram issues. If anyone else is able to help test whatsapp and telegram please provide tested pull requests.

https://github.com/bibanon/matterbridge/

Download linux intel 64-bit binary: https://github.com/bibanon/matterbridge/releases/tag/v1.26.1