diff options
Diffstat (limited to 'app/services/resolve_account_service.rb')
| -rw-r--r-- | app/services/resolve_account_service.rb | 223 |
1 files changed, 66 insertions, 157 deletions
diff --git a/app/services/resolve_account_service.rb b/app/services/resolve_account_service.rb index e557706da..7864c4bcd 100644 --- a/app/services/resolve_account_service.rb +++ b/app/services/resolve_account_service.rb @@ -1,89 +1,107 @@ # frozen_string_literal: true class ResolveAccountService < BaseService - include OStatus2::MagicKey include JsonLdHelper + include DomainControlHelper - DFRN_NS = 'http://purl.org/macgirvin/dfrn/1.0' + class WebfingerRedirectError < StandardError; end - # Find or create a local account for a remote user. - # When creating, look up the user's webfinger and fetch all - # important information from their feed - # @param [String, Account] uri User URI in the form of username@domain + # Find or create an account record for a remote user. When creating, + # look up the user's webfinger and fetch ActivityPub data + # @param [String, Account] uri URI in the username@domain format or account record # @param [Hash] options + # @option options [Boolean] :redirected Do not follow further Webfinger redirects + # @option options [Boolean] :skip_webfinger Do not attempt to refresh account data # @return [Account] def call(uri, options = {}) + return if uri.blank? + + process_options!(uri, options) + + # First of all we want to check if we've got the account + # record with the URI already, and if so, we can exit early + + return if domain_not_allowed?(@domain) + + @account ||= Account.find_remote(@username, @domain) + + return @account if @account&.local? || !webfinger_update_due? + + # At this point we are in need of a Webfinger query, which may + # yield us a different username/domain through a redirect + + process_webfinger!(@uri) + + # Because the username/domain pair may be different than what + # we already checked, we need to check if we've already got + # the record with that URI, again + + return if domain_not_allowed?(@domain) + + @account ||= Account.find_remote(@username, @domain) + + return @account if @account&.local? || !webfinger_update_due? + + # Now it is certain, it is definitely a remote account, and it + # either needs to be created, or updated from fresh data + + process_account! + rescue Goldfinger::Error, WebfingerRedirectError, Oj::ParseError => e + Rails.logger.debug "Webfinger query for #{@uri} failed: #{e}" + nil + end + + private + + def process_options!(uri, options) @options = options if uri.is_a?(Account) @account = uri @username = @account.username @domain = @account.domain - uri = "#{@username}@#{@domain}" - - return @account if @account.local? || !webfinger_update_due? + @uri = [@username, @domain].compact.join('@') else + @uri = uri @username, @domain = uri.split('@') - - return Account.find_local(@username) if TagManager.instance.local_domain?(@domain) - - @account = Account.find_remote(@username, @domain) - - return @account unless webfinger_update_due? end - Rails.logger.debug "Looking up webfinger for #{uri}" - - @webfinger = Goldfinger.finger("acct:#{uri}") + @domain = nil if TagManager.instance.local_domain?(@domain) + end + def process_webfinger!(uri, redirected = false) + @webfinger = Goldfinger.finger("acct:#{@uri}") confirmed_username, confirmed_domain = @webfinger.subject.gsub(/\Aacct:/, '').split('@') if confirmed_username.casecmp(@username).zero? && confirmed_domain.casecmp(@domain).zero? @username = confirmed_username @domain = confirmed_domain - elsif options[:redirected].nil? - return call("#{confirmed_username}@#{confirmed_domain}", options.merge(redirected: true)) + @uri = uri + elsif !redirected + return process_webfinger!("#{confirmed_username}@#{confirmed_domain}", true) else - Rails.logger.debug 'Requested and returned acct URIs do not match' - return + raise WebfingerRedirectError, "The URI #{uri} tries to hijack #{@username}@#{@domain}" end - return if links_missing? || auto_suspend? - return Account.find_local(@username) if TagManager.instance.local_domain?(@domain) + @domain = nil if TagManager.instance.local_domain?(@domain) + end + + def process_account! + return unless activitypub_ready? RedisLock.acquire(lock_options) do |lock| if lock.acquired? @account = Account.find_remote(@username, @domain) - if activitypub_ready? || @account&.activitypub? - handle_activitypub - else - handle_ostatus - end + next if (@account.present? && !@account.activitypub?) || actor_json.nil? + + @account = ActivityPub::ProcessAccountService.new.call(@username, @domain, actor_json) else raise Mastodon::RaceConditionError end end @account - rescue Goldfinger::Error => e - Rails.logger.debug "Webfinger query for #{uri} unsuccessful: #{e}" - nil - end - - private - - def links_missing? - !(activitypub_ready? || ostatus_ready?) - end - - def ostatus_ready? - !(@webfinger.link('http://schemas.google.com/g/2010#updates-from').nil? || - @webfinger.link('salmon').nil? || - @webfinger.link('http://webfinger.net/rel/profile-page').nil? || - @webfinger.link('magic-public-key').nil? || - canonical_uri.nil? || - hub_url.nil?) end def webfinger_update_due? @@ -91,113 +109,13 @@ class ResolveAccountService < BaseService end def activitypub_ready? - !@webfinger.link('self').nil? && - ['application/activity+json', 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'].include?(@webfinger.link('self').type) && - !actor_json.nil? && - actor_json['inbox'].present? - end - - def handle_ostatus - create_account if @account.nil? - update_account - update_account_profile if update_profile? - end - - def update_profile? - @options[:update_profile] - end - - def handle_activitypub - return if actor_json.nil? - - @account = ActivityPub::ProcessAccountService.new.call(@username, @domain, actor_json) - rescue Oj::ParseError - nil - end - - def create_account - Rails.logger.debug "Creating new remote account for #{@username}@#{@domain}" - - @account = Account.new(username: @username, domain: @domain) - @account.suspended_at = domain_block.created_at if auto_suspend? - @account.silenced_at = domain_block.created_at if auto_silence? - @account.private_key = nil - end - - def update_account - @account.last_webfingered_at = Time.now.utc - @account.protocol = :ostatus - @account.remote_url = atom_url - @account.salmon_url = salmon_url - @account.url = url - @account.public_key = public_key - @account.uri = canonical_uri - @account.hub_url = hub_url - @account.save! - end - - def auto_suspend? - domain_block&.suspend? - end - - def auto_silence? - domain_block&.silence? - end - - def domain_block - return @domain_block if defined?(@domain_block) - @domain_block = DomainBlock.rule_for(@domain) - end - - def atom_url - @atom_url ||= @webfinger.link('http://schemas.google.com/g/2010#updates-from').href - end - - def salmon_url - @salmon_url ||= @webfinger.link('salmon').href + !@webfinger.link('self').nil? && ['application/activity+json', 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'].include?(@webfinger.link('self').type) end def actor_url @actor_url ||= @webfinger.link('self').href end - def url - @url ||= @webfinger.link('http://webfinger.net/rel/profile-page').href - end - - def public_key - @public_key ||= magic_key_to_pem(@webfinger.link('magic-public-key').href) - end - - def canonical_uri - return @canonical_uri if defined?(@canonical_uri) - - author_uri = atom.at_xpath('/xmlns:feed/xmlns:author/xmlns:uri') - - if author_uri.nil? - owner = atom.at_xpath('/xmlns:feed').at_xpath('./dfrn:owner', dfrn: DFRN_NS) - author_uri = owner.at_xpath('./xmlns:uri') unless owner.nil? - end - - @canonical_uri = author_uri.nil? ? nil : author_uri.content - end - - def hub_url - return @hub_url if defined?(@hub_url) - - hubs = atom.xpath('//xmlns:link[@rel="hub"]') - @hub_url = hubs.empty? || hubs.first['href'].nil? ? nil : hubs.first['href'] - end - - def atom_body - return @atom_body if defined?(@atom_body) - - @atom_body = Request.new(:get, atom_url).perform do |response| - raise Mastodon::UnexpectedResponseError, response unless response.code == 200 - response.body_with_limit - end - end - def actor_json return @actor_json if defined?(@actor_json) @@ -205,15 +123,6 @@ class ResolveAccountService < BaseService @actor_json = supported_context?(json) && equals_or_includes_any?(json['type'], ActivityPub::FetchRemoteAccountService::SUPPORTED_TYPES) ? json : nil end - def atom - return @atom if defined?(@atom) - @atom = Nokogiri::XML(atom_body) - end - - def update_account_profile - RemoteProfileUpdateWorker.perform_async(@account.id, atom_body.force_encoding('UTF-8'), false) - end - def lock_options { redis: Redis.current, key: "resolve:#{@username}@#{@domain}" } end |