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Webfinger and multiple Fediverse services on a domain (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by [email protected] to c/[email protected]

8 comments fedilink hide all child comments

How does this work? How do you host pixelfed.domain.com and mastodon.domain.com together in the same domain, with queries for "@[email protected]" to the webfinger host path?

I'm other words, how does the querying application know which resource it needs? How do you know that a pixelfed instance will get the pixelfed resource versus the mastodon resource?

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[–] [email protected] 5 points 1 year ago (2 children)

The webfinger includes the subdomain. So the webfinger would be either @[email protected] or @[email protected], given your example.

[–] [email protected] 3 points 1 year ago

Does it still work that way when using the web_domain setting?

https://docs.joinmastodon.org/admin/config/#web_domain

[–] [email protected] 3 points 1 year ago (1 children)

I can't speak for those two services in particular, but I know that Matrix will check https://domain.com/.well-known/matrix/server to see what (sub)domain is responsible for domain.com. I suspect other services also use .well-known too.

[–] [email protected] 1 points 1 year ago

Yes, they use a webfinger on the .well-known path.

[–] [email protected] 2 points 1 year ago (2 children)

I've thought that if some dev created a webfinger reverse proxy they would be the hero of the fediverse.

[–] [email protected] 2 points 1 year ago

I've thought about doing this. It seems simple enough, though it would need a front end to be user friendly. I could build the rest api pretty quickly.

[–] [email protected] 1 points 1 year ago (1 children)

Can you eli5?

I don’t think I understand what you mean.

What would the reverse proxy do in this situation?

[–] [email protected] 1 points 1 year ago

I think what they mean is a service to provide the webfinger response in a customizable manner. I know for me right now, I'm just using wildcards in nginx to handle it for the ActivityPub path, but it's not really ideal because it won't work for other activitypub services as far as I can tell.