Move resolving of activitypub objects to separate api endpoint

[Nutomic]

Test with:

curl -G -X GET -d "q=!main@lemmy-gamma:8561" http://localhost:8540/api/v3/resolve_object | jq
curl -G -X GET -d "q=http://lemmy-beta:8541/post/1" http://localhost:8540/api/v3/resolve_object | jq
etc

We can use this opportunity to move the functionality to a separate place in lemmy-ui, which should make it easier to discover and explain. Not sure exactly where that should be though.

This is a breaking change (maybe we should just create a label for that).

[Nutomic]

For now I'm just moving things to the library whenever that makes sense. Later I need to figure out how to remove the dependencies on lemmy crates (eg passing local domain to the library somehow, instead of depending on Settings).

[Nutomic]

Federation tests are broken, I believe lemmy-js-client needs to be updated first to add the new API method.

[dessalines]

I'm not getting anything back from the requests:

curl -G -X GET -d "q=!main@lemmy-beta:8540" http://localhost:8541/api/v3/resolve_object
error sending request for url (http://lemmy-beta:8540/.well-known/webfinger?resource=group:main@lemmy-beta:8540): error trying to connect: tcp connect error: Connection refused (os error 111)

...

curl -G -X GET -d "q=!main@lemmy-gamma:8540" http://localhost:8541/api/v3/resolve_object
error sending request for url (http://lemmy-gamma:8540/.well-known/webfinger?resource=group:main@lemmy-gamma:8540): error trying to connect
: tcp connect error: Connection refused (os error 111)

Also this is the very first enum response, so I'm trying to debug what it looks like and if its possible to key on it.

[Nutomic]

You need to put the correct, corresponding port, eg lemmy-beta:8551 or lemmy-gamma:8561, which is where that backend is running. And the last digit of the port needs to be 1 so it connects to the backend, not the frontend.

[dessalines]

Ah, looks like it needs rebased again.

[dessalines]

Might be a bit before I add this to lemmy-UI. The webfinger requests require https, and working federation, which makes this a bit difficult to test.

lemmy_1 | [2021-08-20T03:05:23Z DEBUG lemmy_apub_lib::webfinger] Fetching webfinger url: https://my_domain/.well-known/webfinger?resour ce=group:main@my_domain

[Nutomic]

It works fine using docker/federation, no https needed. Only thing to keep in mind is if you want to fetch an actor from lemmy-gamma, you need to open the instance in your browser first so it gets initialized. Also rebased.

[dessalines]

Tests passed, feel free to merge anytime.

[Nutomic]

Didnt even notice that your PR was against my branch again, so confusing 😂