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103 lines
3.0 KiB
103 lines
3.0 KiB
# frozen_string_literal: true
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require_relative '../models/account'
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class ResolveAccountService < BaseService
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include JsonLdHelper
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# Find or create a local account for a remote user.
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# When creating, look up the user's webfinger and fetch all
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# important information from their feed
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# @param [String, Account] uri User URI in the form of username@domain
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# @param [Hash] options
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# @return [Account]
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def call(uri, options = {})
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@options = options
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if uri.is_a?(Account)
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@account = uri
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@username = @account.username
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@domain = @account.domain
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uri = "#{@username}@#{@domain}"
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return @account if @account.local? || !webfinger_update_due?
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else
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@username, @domain = uri.split('@')
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return Account.find_local(@username) if TagManager.instance.local_domain?(@domain)
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@account = Account.find_remote(@username, @domain)
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return @account unless webfinger_update_due?
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end
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Rails.logger.debug "Looking up webfinger for #{uri}"
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@webfinger = Goldfinger.finger("acct:#{uri}")
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confirmed_username, confirmed_domain = @webfinger.subject.gsub(/\Aacct:/, '').split('@')
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if confirmed_username.casecmp(@username).zero? && confirmed_domain.casecmp(@domain).zero?
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@username = confirmed_username
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@domain = confirmed_domain
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elsif options[:redirected].nil?
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return call("#{confirmed_username}@#{confirmed_domain}", options.merge(redirected: true))
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else
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Rails.logger.debug 'Requested and returned acct URIs do not match'
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return
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end
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return Account.find_local(@username) if TagManager.instance.local_domain?(@domain)
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return unless activitypub_ready?
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RedisLock.acquire(lock_options) do |lock|
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if lock.acquired?
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@account = Account.find_remote(@username, @domain)
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next unless @account.nil? || @account.activitypub?
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handle_activitypub
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else
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raise Mastodon::RaceConditionError
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end
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end
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@account
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rescue Goldfinger::Error => e
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Rails.logger.debug "Webfinger query for #{uri} unsuccessful: #{e}"
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nil
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end
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private
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def webfinger_update_due?
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@account.nil? || ((!@options[:skip_webfinger] || @account.ostatus?) && @account.possibly_stale?)
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end
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def activitypub_ready?
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!@webfinger.link('self').nil? && ['application/activity+json', 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'].include?(@webfinger.link('self').type)
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end
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def handle_activitypub
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return if actor_json.nil?
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@account = ActivityPub::ProcessAccountService.new.call(@username, @domain, actor_json)
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rescue Oj::ParseError
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nil
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end
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def actor_url
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@actor_url ||= @webfinger.link('self').href
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end
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def actor_json
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return @actor_json if defined?(@actor_json)
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json = fetch_resource(actor_url, false)
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@actor_json = supported_context?(json) && equals_or_includes_any?(json['type'], ActivityPub::FetchRemoteAccountService::SUPPORTED_TYPES) ? json : nil
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end
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def lock_options
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{ redis: Redis.current, key: "resolve:#{@username}@#{@domain}" }
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end
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end
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