85 lines
2.5 KiB
Ruby
85 lines
2.5 KiB
Ruby
class FollowRemoteAccountService < BaseService
|
|
# 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
|
|
# @param [Boolean] subscribe Whether to initiate a PubSubHubbub subscription
|
|
# @return [Account]
|
|
def call(uri, subscribe = true)
|
|
username, domain = uri.split('@')
|
|
|
|
return Account.find_local(username) if domain == Rails.configuration.x.local_domain
|
|
|
|
account = Account.find_remote(username, domain)
|
|
|
|
if account.nil?
|
|
account = Account.new(username: username, domain: domain)
|
|
elsif account.subscribed?
|
|
return account
|
|
end
|
|
|
|
data = Goldfinger.finger("acct:#{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
|
|
|
|
feed = get_feed(account.remote_url)
|
|
hubs = feed.xpath('//xmlns:link[@rel="hub"]')
|
|
|
|
return nil if hubs.empty? || hubs.first.attribute('href').nil? || feed.at_xpath('/xmlns:feed/xmlns:author/xmlns:uri').nil?
|
|
|
|
account.uri = feed.at_xpath('/xmlns:feed/xmlns:author/xmlns:uri').content
|
|
account.hub_url = hubs.first.attribute('href').value
|
|
|
|
get_profile(feed, account)
|
|
account.save!
|
|
|
|
if subscribe
|
|
account.secret = SecureRandom.hex
|
|
account.verify_token = SecureRandom.hex
|
|
|
|
subscription = account.subscription(api_subscription_url(account.id))
|
|
subscription.subscribe
|
|
|
|
account.save!
|
|
end
|
|
|
|
return account
|
|
rescue Goldfinger::Error, HTTP::Error
|
|
nil
|
|
end
|
|
|
|
private
|
|
|
|
def get_feed(url)
|
|
response = http_client.get(Addressable::URI.parse(url))
|
|
Nokogiri::XML(response)
|
|
end
|
|
|
|
def get_profile(xml, account)
|
|
author = xml.at_xpath('/xmlns:feed/xmlns:author')
|
|
update_remote_profile_service.(author, account)
|
|
end
|
|
|
|
def magic_key_to_pem(magic_key)
|
|
_, modulus, exponent = magic_key.split('.')
|
|
modulus, exponent = [modulus, exponent].map { |n| Base64.urlsafe_decode64(n).bytes.inject(0) { |num, byte| (num << 8) | byte } }
|
|
|
|
key = OpenSSL::PKey::RSA.new
|
|
key.n = modulus
|
|
key.e = exponent
|
|
|
|
key.to_pem
|
|
end
|
|
|
|
def update_remote_profile_service
|
|
@update_remote_profile_service ||= UpdateRemoteProfileService.new
|
|
end
|
|
|
|
def http_client
|
|
HTTP
|
|
end
|
|
end
|