hometown/app/services/activitypub/fetch_remote_account_service.rb
Eugen Rochko dd7ef0dc41 Add ActivityPub inbox (#4216)
* Add ActivityPub inbox

* Handle ActivityPub deletes

* Handle ActivityPub creates

* Handle ActivityPub announces

* Stubs for handling all activities that need to be handled

* Add ActivityPub actor resolving

* Handle conversation URI passing in ActivityPub

* Handle content language in ActivityPub

* Send accept header when fetching actor, handle JSON parse errors

* Test for ActivityPub::FetchRemoteAccountService

* Handle public key and icon/image when embedded/as array/as resolvable URI

* Implement ActivityPub::FetchRemoteStatusService

* Add stubs for more interactions

* Undo activities implemented

* Handle out of order activities

* Hook up ActivityPub to ResolveRemoteAccountService, handle
Update Account activities

* Add fragment IDs to all transient activity serializers

* Add tests and fixes

* Add stubs for missing tests

* Add more tests

* Add more tests
2017-08-08 21:52:15 +02:00

58 lines
1.5 KiB
Ruby

# frozen_string_literal: true
class ActivityPub::FetchRemoteAccountService < BaseService
include JsonLdHelper
# Should be called when uri has already been checked for locality
# Does a WebFinger roundtrip on each call
def call(uri)
@json = fetch_resource(uri)
return unless supported_context? && expected_type?
@uri = @json['id']
@username = @json['preferredUsername']
@domain = Addressable::URI.parse(uri).normalized_host
return unless verified_webfinger?
ActivityPub::ProcessAccountService.new.call(@username, @domain, @json)
rescue Oj::ParseError
nil
end
private
def verified_webfinger?
webfinger = Goldfinger.finger("acct:#{@username}@#{@domain}")
confirmed_username, confirmed_domain = split_acct(webfinger.subject)
return true if @username.casecmp(confirmed_username).zero? && @domain.casecmp(confirmed_domain).zero?
webfinger = Goldfinger.finger("acct:#{confirmed_username}@#{confirmed_domain}")
confirmed_username, confirmed_domain = split_acct(webfinger.subject)
self_reference = webfinger.link('self')
return false if self_reference&.href != @uri
@username = confirmed_username
@domain = confirmed_domain
true
rescue Goldfinger::Error
false
end
def split_acct(acct)
acct.gsub(/\Aacct:/, '').split('@')
end
def supported_context?
super(@json)
end
def expected_type?
@json['type'] == 'Person'
end
end