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mastodon/app/models/remote_follow.rb
Eugen Rochko 7d985f2aac
Remove dependency on goldfinger gem (#14919)
There are edge cases where requests to certain hosts timeout when
using the vanilla HTTP.rb gem, which the goldfinger gem uses. Now
that we no longer need to support OStatus servers, webfinger logic
is so simple that there is no point encapsulating it in a gem, so
we can just use our own Request class. With that, we benefit from
more robust timeout code and IPv4/IPv6 resolution.

Fix #14091
2020-10-08 00:34:57 +02:00

80 lines
1.8 KiB
Ruby

# frozen_string_literal: true
class RemoteFollow
include ActiveModel::Validations
include RoutingHelper
include WebfingerHelper
attr_accessor :acct, :addressable_template
validates :acct, presence: true, domain: { acct: true }
def initialize(attrs = {})
@acct = normalize_acct(attrs[:acct])
end
def valid?
return false unless super
fetch_template!
errors.empty?
end
def subscribe_address_for(account)
addressable_template.expand(uri: ActivityPub::TagManager.instance.uri_for(account)).to_s
end
def interact_address_for(status)
addressable_template.expand(uri: ActivityPub::TagManager.instance.uri_for(status)).to_s
end
private
def normalize_acct(value)
return if value.blank?
username, domain = value.strip.gsub(/\A@/, '').split('@')
domain = begin
if TagManager.instance.local_domain?(domain)
nil
else
TagManager.instance.normalize_domain(domain)
end
end
[username, domain].compact.join('@')
rescue Addressable::URI::InvalidURIError
value
end
def fetch_template!
return missing_resource_error if acct.blank?
_, domain = acct.split('@')
if domain.nil?
@addressable_template = Addressable::Template.new("#{authorize_interaction_url}?uri={uri}")
elsif redirect_uri_template.nil?
missing_resource_error
else
@addressable_template = Addressable::Template.new(redirect_uri_template)
end
end
def redirect_uri_template
acct_resource&.link('http://ostatus.org/schema/1.0/subscribe', 'template')
end
def acct_resource
@acct_resource ||= webfinger!("acct:#{acct}")
rescue Webfinger::Error, HTTP::ConnectionError
nil
end
def missing_resource_error
errors.add(:acct, I18n.t('remote_follow.missing_resource'))
end
end