class FollowRemoteAccountService < BaseService include OStatus2::MagicKey DFRN_NS = 'http://purl.org/macgirvin/dfrn/1.0'.freeze # 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] uri User URI in the form of username@domain # @return [Account] def call(uri) username, domain = uri.split('@') return Account.find_local(username) if TagManager.instance.local_domain?(domain) return nil if DomainBlock.blocked?(domain) account = Account.find_remote(username, domain) return account unless account.nil? Rails.logger.debug "Looking up webfinger for #{uri}" account = Account.new(username: username, domain: domain) data = Goldfinger.finger("acct:#{uri}") raise Goldfinger::Error, 'Missing resource links' if data.link('http://schemas.google.com/g/2010#updates-from').nil? || data.link('salmon').nil? || data.link('http://webfinger.net/rel/profile-page').nil? || data.link('magic-public-key').nil? confirmed_username, confirmed_domain = data.subject.gsub(/\Aacct:/, '').split('@') return Account.find_local(confirmed_username) if TagManager.instance.local_domain?(confirmed_domain) confirmed_account = Account.find_remote(confirmed_username, confirmed_domain) return confirmed_account unless confirmed_account.nil? Rails.logger.debug "Creating new remote account for #{uri}" account.remote_url = data.link('http://schemas.google.com/g/2010#updates-from').href account.salmon_url = data.link('salmon').href account.url = data.link('http://webfinger.net/rel/profile-page').href account.public_key = magic_key_to_pem(data.link('magic-public-key').href) account.private_key = nil xml = get_feed(account.remote_url) hubs = get_hubs(xml) account.uri = get_account_uri(xml) account.hub_url = hubs.first.attribute('href').value get_profile(xml, account) account.save! return account end private def get_feed(url) response = http_client.get(Addressable::URI.parse(url)) Nokogiri::XML(response) end def get_hubs(xml) hubs = xml.xpath('//xmlns:link[@rel="hub"]') raise Goldfinger::Error, 'No PubSubHubbub hubs found' if hubs.empty? || hubs.first.attribute('href').nil? hubs end def get_account_uri(xml) author_uri = xml.at_xpath('/xmlns:feed/xmlns:author/xmlns:uri') if author_uri.nil? owner = xml.at_xpath('/xmlns:feed').at_xpath('./dfrn:owner', dfrn: DFRN_NS) author_uri = owner.at_xpath('./xmlns:uri') unless owner.nil? end raise Goldfinger::Error, 'Author URI could not be found' if author_uri.nil? author_uri.content end def get_profile(xml, account) author = xml.at_xpath('/xmlns:feed/xmlns:author') || xml.at_xpath('/xmlns:feed').at_xpath('./dfrn:owner', dfrn: DFRN_NS) update_remote_profile_service.call(author, account) end def update_remote_profile_service @update_remote_profile_service ||= UpdateRemoteProfileService.new end def http_client HTTP.timeout(:per_operation, write: 20, connect: 20, read: 50) end end