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Add ActivityPub inbox (#4216)

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* Add ActivityPub inbox

* Handle ActivityPub deletes

* Handle ActivityPub creates

* Handle ActivityPub announces

* Stubs for handling all activities that need to be handled

* Add ActivityPub actor resolving

* Handle conversation URI passing in ActivityPub

* Handle content language in ActivityPub

* Send accept header when fetching actor, handle JSON parse errors

* Test for ActivityPub::FetchRemoteAccountService

* Handle public key and icon/image when embedded/as array/as resolvable URI

* Implement ActivityPub::FetchRemoteStatusService

* Add stubs for more interactions

* Undo activities implemented

* Handle out of order activities

* Hook up ActivityPub to ResolveRemoteAccountService, handle
Update Account activities

* Add fragment IDs to all transient activity serializers

* Add tests and fixes

* Add stubs for missing tests

* Add more tests

* Add more tests
This commit is contained in:
Eugen Rochko 2017-08-08 21:52:15 +02:00 committed by GitHub
parent dcbc1af38a
commit dd7ef0dc41
50 changed files with 1652 additions and 21 deletions
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30
app/controllers/activitypub/inboxes_controller.rb Normal file
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@ -0,0 +1,30 @@
# frozen_string_literal: true
class ActivityPub::InboxesController < Api::BaseController
include SignatureVerification
before_action :set_account
def create
if signed_request_account
process_payload
head 201
else
head 202
end
end
private
def set_account
@account = Account.find_local!(params[:account_username])
end
def body
@body ||= request.body.read
end
def process_payload
ActivityPub::ProcessingWorker.perform_async(signed_request_account.id, body.force_encoding('UTF-8'))
end
end

31
app/helpers/jsonld_helper.rb Normal file
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@ -0,0 +1,31 @@
# frozen_string_literal: true
module JsonLdHelper
def equals_or_includes?(haystack, needle)
haystack.is_a?(Array) ? haystack.include?(needle) : haystack == needle
end
def first_of_value(value)
value.is_a?(Array) ? value.first : value
end
def supported_context?(json)
equals_or_includes?(json['@context'], ActivityPub::TagManager::CONTEXT)
end
def fetch_resource(uri)
response = build_request(uri).perform
return if response.code != 200
Oj.load(response.to_s, mode: :strict)
rescue Oj::ParseError
nil
end
private
def build_request(uri)
request = Request.new(:get, uri)
request.add_headers('Accept' => 'application/activity+json')
request
end
end

109
app/lib/activitypub/activity.rb Normal file
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@ -0,0 +1,109 @@
# frozen_string_literal: true
class ActivityPub::Activity
include JsonLdHelper
def initialize(json, account)
@json = json
@account = account
@object = @json['object']
end
def perform
raise NotImplementedError
end
class << self
def factory(json, account)
@json = json
klass&.new(json, account)
end
private
def klass
case @json['type']
when 'Create'
ActivityPub::Activity::Create
when 'Announce'
ActivityPub::Activity::Announce
when 'Delete'
ActivityPub::Activity::Delete
when 'Follow'
ActivityPub::Activity::Follow
when 'Like'
ActivityPub::Activity::Like
when 'Block'
ActivityPub::Activity::Block
when 'Update'
ActivityPub::Activity::Update
when 'Undo'
ActivityPub::Activity::Undo
end
end
end
protected
def status_from_uri(uri)
ActivityPub::TagManager.instance.uri_to_resource(uri, Status)
end
def account_from_uri(uri)
ActivityPub::TagManager.instance.uri_to_resource(uri, Account)
end
def object_uri
@object_uri ||= @object.is_a?(String) ? @object : @object['id']
end
def redis
Redis.current
end
def distribute(status)
notify_about_reblog(status) if reblog_of_local_account?(status)
notify_about_mentions(status)
crawl_links(status)
distribute_to_followers(status)
end
def reblog_of_local_account?(status)
status.reblog? && status.reblog.account.local?
end
def notify_about_reblog(status)
NotifyService.new.call(status.reblog.account, status)
end
def notify_about_mentions(status)
status.mentions.includes(:account).each do |mention|
next unless mention.account.local? && audience_includes?(mention.account)
NotifyService.new.call(mention.account, mention)
end
end
def crawl_links(status)
return if status.spoiler_text?
LinkCrawlWorker.perform_async(status.id)
end
def distribute_to_followers(status)
DistributionWorker.perform_async(status.id)
end
def delete_arrived_first?(uri)
key = "delete_upon_arrival:#{@account.id}:#{uri}"
if redis.exists(key)
redis.del(key)
true
else
false
end
end
def delete_later!(uri)
redis.setex("delete_upon_arrival:#{@account.id}:#{uri}", 6.hours.seconds, uri)
end
end

14
app/lib/activitypub/activity/announce.rb Normal file
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@ -0,0 +1,14 @@
# frozen_string_literal: true
class ActivityPub::Activity::Announce < ActivityPub::Activity
def perform
original_status = status_from_uri(object_uri)
original_status = ActivityPub::FetchRemoteStatusService.new.call(object_uri) if original_status.nil?
return if original_status.nil? || delete_arrived_first?(@json['id'])
status = Status.create!(account: @account, reblog: original_status, uri: @json['id'])
distribute(status)
status
end
end

12
app/lib/activitypub/activity/block.rb Normal file
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@ -0,0 +1,12 @@
# frozen_string_literal: true
class ActivityPub::Activity::Block < ActivityPub::Activity
def perform
target_account = account_from_uri(object_uri)
return if target_account.nil? || !target_account.local? || delete_arrived_first?(@json['id'])
UnfollowService.new.call(target_account, @account) if target_account.following?(@account)
@account.block!(target_account)
end
end

148
app/lib/activitypub/activity/create.rb Normal file
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@ -0,0 +1,148 @@
# frozen_string_literal: true
class ActivityPub::Activity::Create < ActivityPub::Activity
def perform
return if delete_arrived_first?(object_uri) || unsupported_object_type?
status = Status.find_by(uri: object_uri)
return status unless status.nil?
ApplicationRecord.transaction do
status = Status.create!(status_params)
process_tags(status)
process_attachments(status)
end
resolve_thread(status)
distribute(status)
status
end
private
def status_params
{
uri: @object['id'],
url: @object['url'],
account: @account,
text: text_from_content || '',
language: language_from_content,
spoiler_text: @object['summary'] || '',
created_at: @object['published'] || Time.now.utc,
reply: @object['inReplyTo'].present?,
sensitive: @object['sensitive'] || false,
visibility: visibility_from_audience,
thread: replied_to_status,
conversation: conversation_from_uri(@object['_:conversation']),
}
end
def process_tags(status)
return unless @object['tag'].is_a?(Array)
@object['tag'].each do |tag|
case tag['type']
when 'Hashtag'
process_hashtag tag, status
when 'Mention'
process_mention tag, status
end
end
end
def process_hashtag(tag, status)
hashtag = tag['name'].gsub(/\A#/, '').mb_chars.downcase
hashtag = Tag.where(name: hashtag).first_or_initialize(name: hashtag)
status.tags << hashtag
end
def process_mention(tag, status)
account = account_from_uri(tag['href'])
account = ActivityPub::FetchRemoteAccountService.new.call(tag['href']) if account.nil?
return if account.nil?
account.mentions.create(status: status)
end
def process_attachments(status)
return unless @object['attachment'].is_a?(Array)
@object['attachment'].each do |attachment|
next if unsupported_media_type?(attachment['mediaType'])
href = Addressable::URI.parse(attachment['url']).normalize.to_s
media_attachment = MediaAttachment.create(status: status, account: status.account, remote_url: href)
next if skip_download?
media_attachment.file_remote_url = href
media_attachment.save
end
end
def resolve_thread(status)
return unless status.reply? && status.thread.nil?
ActivityPub::ThreadResolveWorker.perform_async(status.id, @object['inReplyTo'])
end
def conversation_from_uri(uri)
return nil if uri.nil?
return Conversation.find_by(id: TagManager.instance.unique_tag_to_local_id(uri, 'Conversation')) if TagManager.instance.local_id?(uri)
Conversation.find_by(uri: uri) || Conversation.create!(uri: uri)
end
def visibility_from_audience
if equals_or_includes?(@object['to'], ActivityPub::TagManager::COLLECTIONS[:public])
:public
elsif equals_or_includes?(@object['cc'], ActivityPub::TagManager::COLLECTIONS[:public])
:unlisted
elsif equals_or_includes?(@object['to'], @account.followers_url)
:private
else
:direct
end
end
def audience_includes?(account)
uri = ActivityPub::TagManager.instance.uri_for(account)
equals_or_includes?(@object['to'], uri) || equals_or_includes?(@object['cc'], uri)
end
def replied_to_status
return if @object['inReplyTo'].blank?
@replied_to_status ||= status_from_uri(@object['inReplyTo'])
end
def text_from_content
if @object['content'].present?
@object['content']
elsif language_map?
@object['contentMap'].values.first
end
end
def language_from_content
return nil unless language_map?
@object['contentMap'].keys.first
end
def language_map?
@object['contentMap'].is_a?(Hash) && !@object['contentMap'].empty?
end
def unsupported_object_type?
@object.is_a?(String) || !%w(Article Note).include?(@object['type'])
end
def unsupported_media_type?(mime_type)
mime_type.present? && !(MediaAttachment::IMAGE_MIME_TYPES + MediaAttachment::VIDEO_MIME_TYPES).include?(mime_type)
end
def skip_download?
return @skip_download if defined?(@skip_download)
@skip_download ||= DomainBlock.find_by(domain: @account.domain)&.reject_media?
end
end

13
app/lib/activitypub/activity/delete.rb Normal file
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@ -0,0 +1,13 @@
# frozen_string_literal: true
class ActivityPub::Activity::Delete < ActivityPub::Activity
def perform
status = Status.find_by(uri: object_uri, account: @account)
if status.nil?
delete_later!(object_uri)
else
RemoveStatusService.new.call(status)
end
end
end

12
app/lib/activitypub/activity/follow.rb Normal file
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@ -0,0 +1,12 @@
# frozen_string_literal: true
class ActivityPub::Activity::Follow < ActivityPub::Activity
def perform
target_account = account_from_uri(object_uri)
return if target_account.nil? || !target_account.local? || delete_arrived_first?(@json['id'])
follow = @account.follow!(target_account)
NotifyService.new.call(target_account, follow)
end
end

12
app/lib/activitypub/activity/like.rb Normal file
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@ -0,0 +1,12 @@
# frozen_string_literal: true
class ActivityPub::Activity::Like < ActivityPub::Activity
def perform
original_status = status_from_uri(object_uri)
return if original_status.nil? || !original_status.account.local? || delete_arrived_first?(@json['id'])
favourite = original_status.favourites.where(account: @account).first_or_create!(account: @account)
NotifyService.new.call(original_status.account, favourite)
end
end

69
app/lib/activitypub/activity/undo.rb Normal file
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@ -0,0 +1,69 @@
# frozen_string_literal: true
class ActivityPub::Activity::Undo < ActivityPub::Activity
def perform
case @object['type']
when 'Announce'
undo_announce
when 'Follow'
undo_follow
when 'Like'
undo_like
when 'Block'
undo_block
end
end
private
def undo_announce
status = Status.find_by(uri: object_uri, account: @account)
if status.nil?
delete_later!(object_uri)
else
RemoveStatusService.new.call(status)
end
end
def undo_follow
target_account = account_from_uri(target_uri)
return if target_account.nil? || !target_account.local?
if @account.following?(target_account)
@account.unfollow!(target_account)
else
delete_later!(object_uri)
end
end
def undo_like
status = status_from_uri(target_uri)
return if status.nil? || !status.account.local?
if @account.favourited?(status)
favourite = status.favourites.where(account: @account).first
favourite&.destroy
else
delete_later!(object_uri)
end
end
def undo_block
target_account = account_from_uri(target_uri)
return if target_account.nil? || !target_account.local?
if @account.blocking?(target_account)
UnblockService.new.call(@account, target_account)
else
delete_later!(object_uri)
end
end
def target_uri
@target_uri ||= @object['object'].is_a?(String) ? @object['object'] : @object['object']['id']
end
end

17
app/lib/activitypub/activity/update.rb Normal file
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@ -0,0 +1,17 @@
# frozen_string_literal: true
class ActivityPub::Activity::Update < ActivityPub::Activity
def perform
case @object['type']
when 'Person'
update_account
end
end
private
def update_account
return if @account.uri != object_uri
ActivityPub::ProcessAccountService.new.call(@account.username, @account.domain, @object)
end
end

2
app/lib/activitypub/adapter.rb
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@ -7,7 +7,7 @@ class ActivityPub::Adapter < ActiveModelSerializers::Adapter::Base
def serializable_hash(options = nil)
options = serialization_options(options)
serialized_hash = { '@context': 'https://www.w3.org/ns/activitystreams' }.merge(ActiveModelSerializers::Adapter::Attributes.new(serializer, instance_options).serializable_hash(options))
serialized_hash = { '@context': ActivityPub::TagManager::CONTEXT }.merge(ActiveModelSerializers::Adapter::Attributes.new(serializer, instance_options).serializable_hash(options))
self.class.transform_key_casing!(serialized_hash, instance_options)
end
end

25
app/lib/activitypub/tag_manager.rb
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@ -6,6 +6,8 @@ class ActivityPub::TagManager
include Singleton
include RoutingHelper
CONTEXT = 'https://www.w3.org/ns/activitystreams'
COLLECTIONS = {
public: 'https://www.w3.org/ns/activitystreams#Public',
}.freeze
@ -66,4 +68,27 @@ class ActivityPub::TagManager
cc
end
def local_uri?(uri)
host = Addressable::URI.parse(uri).normalized_host
::TagManager.instance.local_domain?(host) || ::TagManager.instance.web_domain?(host)
end
def uri_to_local_id(uri, param = :id)
path_params = Rails.application.routes.recognize_path(uri)
path_params[param]
end
def uri_to_resource(uri, klass)
if local_uri?(uri)
case klass.name
when 'Account'
klass.find_local(uri_to_local_id(uri, :username))
else
klass.find_by(id: uri_to_local_id(uri))
end
else
klass.find_by(uri: uri)
end
end
end

2
app/models/concerns/remotable.rb
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@ -10,6 +10,8 @@ module Remotable
alt_method_name = "reset_#{attachment_name}!".to_sym
define_method method_name do |url|
return if url.blank?
begin
parsed_url = Addressable::URI.parse(url).normalize
rescue Addressable::URI::InvalidURIError

6
app/serializers/activitypub/accept_follow_serializer.rb
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@ -1,10 +1,14 @@
# frozen_string_literal: true
class ActivityPub::AcceptFollowSerializer < ActiveModel::Serializer
attributes :type, :actor
attributes :id, :type, :actor
has_one :object, serializer: ActivityPub::FollowSerializer
def id
[ActivityPub::TagManager.instance.uri_for(object.target_account), '#accepts/follows/', object.id].join
end
def type
'Accept'
end

37
app/serializers/activitypub/actor_serializer.rb
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@ -5,10 +5,27 @@ class ActivityPub::ActorSerializer < ActiveModel::Serializer
attributes :id, :type, :following, :followers,
:inbox, :outbox, :preferred_username,
:name, :summary, :icon, :image
:name, :summary, :url
has_one :public_key, serializer: ActivityPub::PublicKeySerializer
class ImageSerializer < ActiveModel::Serializer
include RoutingHelper
attributes :type, :url
def type
'Image'
end
def url
full_asset_url(object.url(:original))
end
end
has_one :icon, serializer: ImageSerializer, if: :avatar_exists?
has_one :image, serializer: ImageSerializer, if: :header_exists?
def id
account_url(object)
end
@ -26,7 +43,7 @@ class ActivityPub::ActorSerializer < ActiveModel::Serializer
end
def inbox
nil
account_inbox_url(object)
end
def outbox
@ -46,14 +63,26 @@ class ActivityPub::ActorSerializer < ActiveModel::Serializer
end
def icon
full_asset_url(object.avatar.url(:original))
object.avatar
end
def image
full_asset_url(object.header.url(:original))
object.header
end
def public_key
object
end
def url
short_account_url(object)
end
def avatar_exists?
object.avatar.exists?
end
def header_exists?
object.header.exists?
end
end

6
app/serializers/activitypub/block_serializer.rb
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@ -1,9 +1,13 @@
# frozen_string_literal: true
class ActivityPub::BlockSerializer < ActiveModel::Serializer
attributes :type, :actor
attributes :id, :type, :actor
attribute :virtual_object, key: :object
def id
[ActivityPub::TagManager.instance.uri_for(object.account), '#blocks/', object.id].join
end
def type
'Block'
end

6
app/serializers/activitypub/delete_serializer.rb
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@ -1,9 +1,13 @@
# frozen_string_literal: true
class ActivityPub::DeleteSerializer < ActiveModel::Serializer
attributes :type, :actor
attributes :id, :type, :actor
attribute :virtual_object, key: :object
def id
[ActivityPub::TagManager.instance.uri_for(object), '#delete'].join
end
def type
'Delete'
end

6
app/serializers/activitypub/follow_serializer.rb
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@ -1,9 +1,13 @@
# frozen_string_literal: true
class ActivityPub::FollowSerializer < ActiveModel::Serializer
attributes :type, :actor
attributes :id, :type, :actor
attribute :virtual_object, key: :object
def id
[ActivityPub::TagManager.instance.uri_for(object.account), '#follows/', object.id].join
end
def type
'Follow'
end

6
app/serializers/activitypub/like_serializer.rb
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@ -1,9 +1,13 @@
# frozen_string_literal: true
class ActivityPub::LikeSerializer < ActiveModel::Serializer
attributes :type, :actor
attributes :id, :type, :actor
attribute :virtual_object, key: :object
def id
[ActivityPub::TagManager.instance.uri_for(object.account), '#likes/', object.id].join
end
def type
'Like'
end

6
app/serializers/activitypub/reject_follow_serializer.rb
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@ -1,10 +1,14 @@
# frozen_string_literal: true
class ActivityPub::RejectFollowSerializer < ActiveModel::Serializer
attributes :type, :actor
attributes :id, :type, :actor
has_one :object, serializer: ActivityPub::FollowSerializer
def id
[ActivityPub::TagManager.instance.uri_for(object.target_account), '#rejects/follows/', object.id].join
end
def type
'Reject'
end

6
app/serializers/activitypub/undo_block_serializer.rb
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@ -1,10 +1,14 @@
# frozen_string_literal: true
class ActivityPub::UndoBlockSerializer < ActiveModel::Serializer
attributes :type, :actor
attributes :id, :type, :actor
has_one :object, serializer: ActivityPub::BlockSerializer
def id
[ActivityPub::TagManager.instance.uri_for(object.account), '#blocks/', object.id, '/undo'].join
end
def type
'Undo'
end

6
app/serializers/activitypub/undo_follow_serializer.rb
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@ -1,10 +1,14 @@
# frozen_string_literal: true
class ActivityPub::UndoFollowSerializer < ActiveModel::Serializer
attributes :type, :actor
attributes :id, :type, :actor
has_one :object, serializer: ActivityPub::FollowSerializer
def id
[ActivityPub::TagManager.instance.uri_for(object.account), '#follows/', object.id, '/undo'].join
end
def type
'Undo'
end

6
app/serializers/activitypub/undo_like_serializer.rb
View file

@ -1,10 +1,14 @@
# frozen_string_literal: true
class ActivityPub::UndoLikeSerializer < ActiveModel::Serializer
attributes :type, :actor
attributes :id, :type, :actor
has_one :object, serializer: ActivityPub::LikeSerializer
def id
[ActivityPub::TagManager.instance.uri_for(object.account), '#likes/', object.id, '/undo'].join
end
def type
'Undo'
end

6
app/serializers/activitypub/update_serializer.rb
View file

@ -1,10 +1,14 @@
# frozen_string_literal: true
class ActivityPub::UpdateSerializer < ActiveModel::Serializer
attributes :type, :actor
attributes :id, :type, :actor
has_one :object, serializer: ActivityPub::ActorSerializer
def id
[ActivityPub::TagManager.instance.uri_for(object), '#updates/', object.updated_at.to_i].join
end
def type
'Update'
end

57
app/services/activitypub/fetch_remote_account_service.rb Normal file
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@ -0,0 +1,57 @@
# frozen_string_literal: true
class ActivityPub::FetchRemoteAccountService < BaseService
include JsonLdHelper
# Should be called when uri has already been checked for locality
# Does a WebFinger roundtrip on each call
def call(uri)
@json = fetch_resource(uri)
return unless supported_context? && expected_type?
@uri = @json['id']
@username = @json['preferredUsername']
@domain = Addressable::URI.parse(uri).normalized_host
return unless verified_webfinger?
ActivityPub::ProcessAccountService.new.call(@username, @domain, @json)
rescue Oj::ParseError
nil
end
private
def verified_webfinger?
webfinger = Goldfinger.finger("acct:#{@username}@#{@domain}")
confirmed_username, confirmed_domain = split_acct(webfinger.subject)
return true if @username.casecmp(confirmed_username).zero? && @domain.casecmp(confirmed_domain).zero?
webfinger = Goldfinger.finger("acct:#{confirmed_username}@#{confirmed_domain}")
confirmed_username, confirmed_domain = split_acct(webfinger.subject)
self_reference = webfinger.link('self')
return false if self_reference&.href != @uri
@username = confirmed_username
@domain = confirmed_domain
true
rescue Goldfinger::Error
false
end
def split_acct(acct)
acct.gsub(/\Aacct:/, '').split('@')
end
def supported_context?
super(@json)
end
def expected_type?
@json['type'] == 'Person'
end
end

36
app/services/activitypub/fetch_remote_status_service.rb Normal file
View file

@ -0,0 +1,36 @@
# frozen_string_literal: true
class ActivityPub::FetchRemoteStatusService < BaseService
include JsonLdHelper
# Should be called when uri has already been checked for locality
def call(uri)
@json = fetch_resource(uri)
return unless supported_context? && expected_type?
attributed_to = first_of_value(@json['attributedTo'])
attributed_to = attributed_to['id'] if attributed_to.is_a?(Hash)
return unless trustworthy_attribution?(uri, attributed_to)
actor = ActivityPub::TagManager.instance.uri_to_resource(attributed_to, Account)
actor = ActivityPub::FetchRemoteAccountService.new.call(attributed_to) if actor.nil?
ActivityPub::Activity::Create.new({ 'object' => @json }, actor).perform
end
private
def trustworthy_attribution?(uri, attributed_to)
Addressable::URI.parse(uri).normalized_host.casecmp(Addressable::URI.parse(attributed_to).normalized_host).zero?
end
def supported_context?
super(@json)
end
def expected_type?
%w(Note Article).include? @json['type']
end
end

84
app/services/activitypub/process_account_service.rb Normal file
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@ -0,0 +1,84 @@
# frozen_string_literal: true
class ActivityPub::ProcessAccountService < BaseService
include JsonLdHelper
# Should be called with confirmed valid JSON
# and WebFinger-resolved username and domain
def call(username, domain, json)
@json = json
@uri = @json['id']
@username = username
@domain = domain
@account = Account.find_by(uri: @uri)
create_account if @account.nil?
update_account
@account
rescue Oj::ParseError
nil
end
private
def create_account
@account = Account.new
@account.username = @username
@account.domain = @domain
@account.uri = @uri
@account.suspended = true if auto_suspend?
@account.silenced = true if auto_silence?
@account.private_key = nil
@account.save!
end
def update_account
@account.last_webfingered_at = Time.now.utc
@account.protocol = :activitypub
@account.inbox_url = @json['inbox'] || ''
@account.outbox_url = @json['outbox'] || ''
@account.shared_inbox_url = @json['sharedInbox'] || ''
@account.followers_url = @json['followers'] || ''
@account.url = @json['url'] || @uri
@account.display_name = @json['name'] || ''
@account.note = @json['summary'] || ''
@account.avatar_remote_url = image_url('icon')
@account.header_remote_url = image_url('image')
@account.public_key = public_key || ''
@account.save!
end
def image_url(key)
value = first_of_value(@json[key])
return if value.nil?
return @json[key]['url'] if @json[key].is_a?(Hash)
image = fetch_resource(value)
image['url'] if image
end
def public_key
value = first_of_value(@json['publicKey'])
return if value.nil?
return value['publicKeyPem'] if value.is_a?(Hash)
key = fetch_resource(value)
key['publicKeyPem'] if key
end
def auto_suspend?
domain_block && domain_block.suspend?
end
def auto_silence?
domain_block && domain_block.silence?
end
def domain_block
return @domain_block if defined?(@domain_block)
@domain_block = DomainBlock.find_by(domain: @domain)
end
end

38
app/services/activitypub/process_collection_service.rb Normal file
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@ -0,0 +1,38 @@
# frozen_string_literal: true
class ActivityPub::ProcessCollectionService < BaseService
include JsonLdHelper
def call(body, account)
@account = account
@json = Oj.load(body, mode: :strict)
return if @account.suspended? || !supported_context?
case @json['type']
when 'Collection', 'CollectionPage'
process_items @json['items']
when 'OrderedCollection', 'OrderedCollectionPage'
process_items @json['orderedItems']
else
process_items [@json]
end
rescue Oj::ParseError
nil
end
private
def process_items(items)
items.reverse_each.map { |item| process_item(item) }.compact
end
def supported_context?
super(@json)
end
def process_item(item)
activity = ActivityPub::Activity.factory(item, @account)
activity&.perform
end
end

49
app/services/resolve_remote_account_service.rb
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@ -2,6 +2,7 @@
class ResolveRemoteAccountService < BaseService
include OStatus2::MagicKey
include JsonLdHelper
DFRN_NS = 'http://purl.org/macgirvin/dfrn/1.0'
@ -12,6 +13,7 @@ class ResolveRemoteAccountService < BaseService
# @return [Account]
def call(uri, update_profile = true, redirected = nil)
@username, @domain = uri.split('@')
@update_profile = update_profile
return Account.find_local(@username) if TagManager.instance.local_domain?(@domain)
@ -42,10 +44,11 @@ class ResolveRemoteAccountService < BaseService
if lock.acquired?
@account = Account.find_remote(@username, @domain)
create_account if @account.nil?
update_account
update_account_profile if update_profile
if activitypub_ready?
handle_activitypub
else
handle_ostatus
end
end
end
@ -58,18 +61,47 @@ class ResolveRemoteAccountService < BaseService
private
def links_missing?
@webfinger.link('http://schemas.google.com/g/2010#updates-from').nil? ||
!(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?
hub_url.nil?)
end
def webfinger_update_due?
@account.nil? || @account.last_webfingered_at.nil? || @account.last_webfingered_at <= 1.day.ago
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)
end
def handle_ostatus
create_account if @account.nil?
update_account
update_account_profile if update_profile?
end
def update_profile?
@update_profile
end
def handle_activitypub
json = fetch_resource(actor_url)
return unless supported_context?(json) && json['type'] == 'Person'
@account = ActivityPub::ProcessAccountService.new.call(@username, @domain, json)
rescue Oj::ParseError
nil
end
def create_account
Rails.logger.debug "Creating new remote account for #{@username}@#{@domain}"
@ -81,6 +113,7 @@ class ResolveRemoteAccountService < BaseService
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
@ -111,6 +144,10 @@ class ResolveRemoteAccountService < BaseService
@salmon_url ||= @webfinger.link('salmon').href
end
def actor_url
@actor_url ||= @webfinger.link('self').href
end
def url
@url ||= @webfinger.link('http://webfinger.net/rel/profile-page').href
end

11
app/workers/activitypub/processing_worker.rb Normal file
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@ -0,0 +1,11 @@
# frozen_string_literal: true
class ActivityPub::ProcessingWorker
include Sidekiq::Worker
sidekiq_options backtrace: true
def perform(account_id, body)
ProcessCollectionService.new.call(body, Account.find(account_id))
end
end

17
app/workers/activitypub/thread_resolve_worker.rb Normal file
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@ -0,0 +1,17 @@
# frozen_string_literal: true
class ActivityPub::ThreadResolveWorker
include Sidekiq::Worker
sidekiq_options queue: 'pull', retry: false
def perform(child_status_id, parent_uri)
child_status = Status.find(child_status_id)
parent_status = ActivityPub::FetchRemoteStatusService.new.call(parent_uri)
return if parent_status.nil?
child_status.thread = parent_status
child_status.save!
end
end

1
config/initializers/inflections.rb
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@ -17,4 +17,5 @@ ActiveSupport::Inflector.inflections(:en) do |inflect|
inflect.acronym 'ActivityPub'
inflect.acronym 'PubSubHubbub'
inflect.acronym 'ActivityStreams'
inflect.acronym 'JsonLd'
end

1
config/routes.rb
View file

@ -51,6 +51,7 @@ Rails.application.routes.draw do
resource :follow, only: [:create], controller: :account_follow
resource :unfollow, only: [:create], controller: :account_unfollow
resource :outbox, only: [:show], module: :activitypub
resource :inbox, only: [:create], module: :activitypub
end
get '/@:username', to: 'accounts#show', as: :short_account

7
spec/controllers/activitypub/inboxes_controller_spec.rb Normal file
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@ -0,0 +1,7 @@
require 'rails_helper'
RSpec.describe ActivityPub::InboxesController, type: :controller do
describe 'POST #create' do
pending
end
end

19
spec/controllers/activitypub/outboxes_controller_spec.rb Normal file
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@ -0,0 +1,19 @@
require 'rails_helper'
RSpec.describe ActivityPub::OutboxesController, type: :controller do
let!(:account) { Fabricate(:account) }
before do
Fabricate(:status, account: account)
end
describe 'GET #show' do
before do
get :show, params: { account_username: account.username }
end
it 'returns http success' do
expect(response).to have_http_status(:success)
end
end
end

35
spec/helpers/jsonld_helper_spec.rb Normal file
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@ -0,0 +1,35 @@
# frozen_string_literal: true
require 'rails_helper'
describe JsonLdHelper do
describe '#equals_or_includes?' do
it 'returns true when value equals' do
expect(helper.equals_or_includes?('foo', 'foo')).to be true
end
it 'returns false when value does not equal' do
expect(helper.equals_or_includes?('foo', 'bar')).to be false
end
it 'returns true when value is included' do
expect(helper.equals_or_includes?(%w(foo baz), 'foo')).to be true
end
it 'returns false when value is not included' do
expect(helper.equals_or_includes?(%w(foo baz), 'bar')).to be false
end
end
describe '#first_of_value' do
pending
end
describe '#supported_context?' do
pending
end
describe '#fetch_resource' do
pending
end
end

29
spec/lib/activitypub/activity/announce_spec.rb Normal file
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@ -0,0 +1,29 @@
require 'rails_helper'
RSpec.describe ActivityPub::Activity::Announce do
let(:sender) { Fabricate(:account) }
let(:recipient) { Fabricate(:account) }
let(:status) { Fabricate(:status, account: recipient) }
let(:json) do
{
'@context': 'https://www.w3.org/ns/activitystreams',
id: 'foo',
type: 'Announce',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: ActivityPub::TagManager.instance.uri_for(status),
}.with_indifferent_access
end
describe '#perform' do
subject { described_class.new(json, sender) }
before do
subject.perform
end
it 'creates a reblog by sender of status' do
expect(sender.reblogged?(status)).to be true
end
end
end

28
spec/lib/activitypub/activity/block_spec.rb Normal file
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@ -0,0 +1,28 @@
require 'rails_helper'
RSpec.describe ActivityPub::Activity::Block do
let(:sender) { Fabricate(:account) }
let(:recipient) { Fabricate(:account) }
let(:json) do
{
'@context': 'https://www.w3.org/ns/activitystreams',
id: 'foo',
type: 'Block',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: ActivityPub::TagManager.instance.uri_for(recipient),
}.with_indifferent_access
end
describe '#perform' do
subject { described_class.new(json, sender) }
before do
subject.perform
end
it 'creates a block from sender to recipient' do
expect(sender.blocking?(recipient)).to be true
end
end
end

221
spec/lib/activitypub/activity/create_spec.rb Normal file
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@ -0,0 +1,221 @@
require 'rails_helper'
RSpec.describe ActivityPub::Activity::Create do
let(:sender) { Fabricate(:account, followers_url: 'http://example.com/followers') }
let(:json) do
{
'@context': 'https://www.w3.org/ns/activitystreams',
id: 'foo',
type: 'Create',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: object_json,
}.with_indifferent_access
end
subject { described_class.new(json, sender) }
before do
stub_request(:get, 'http://example.com/attachment.png').to_return(request_fixture('avatar.txt'))
end
describe '#perform' do
before do
subject.perform
end
context 'standalone' do
let(:object_json) do
{
id: 'bar',
type: 'Note',
content: 'Lorem ipsum',
}
end
it 'creates status' do
status = sender.statuses.first
expect(status).to_not be_nil
expect(status.text).to eq 'Lorem ipsum'
end
it 'missing to/cc defaults to direct privacy' do
status = sender.statuses.first
expect(status).to_not be_nil
expect(status.visibility).to eq 'direct'
end
end
context 'public' do
let(:object_json) do
{
id: 'bar',
type: 'Note',
content: 'Lorem ipsum',
to: 'https://www.w3.org/ns/activitystreams#Public',
}
end
it 'creates status' do
status = sender.statuses.first
expect(status).to_not be_nil
expect(status.visibility).to eq 'public'
end
end
context 'unlisted' do
let(:object_json) do
{
id: 'bar',
type: 'Note',
content: 'Lorem ipsum',
cc: 'https://www.w3.org/ns/activitystreams#Public',
}
end
it 'creates status' do
status = sender.statuses.first
expect(status).to_not be_nil
expect(status.visibility).to eq 'unlisted'
end
end
context 'private' do
let(:object_json) do
{
id: 'bar',
type: 'Note',
content: 'Lorem ipsum',
to: 'http://example.com/followers',
}
end
it 'creates status' do
status = sender.statuses.first
expect(status).to_not be_nil
expect(status.visibility).to eq 'private'
end
end
context 'direct' do
let(:recipient) { Fabricate(:account) }
let(:object_json) do
{
id: 'bar',
type: 'Note',
content: 'Lorem ipsum',
to: ActivityPub::TagManager.instance.uri_for(recipient),
}
end
it 'creates status' do
status = sender.statuses.first
expect(status).to_not be_nil
expect(status.visibility).to eq 'direct'
end
end
context 'as a reply' do
let(:original_status) { Fabricate(:status) }
let(:object_json) do
{
id: 'bar',
type: 'Note',
content: 'Lorem ipsum',
inReplyTo: ActivityPub::TagManager.instance.uri_for(original_status),
}
end
it 'creates status' do
status = sender.statuses.first
expect(status).to_not be_nil
expect(status.thread).to eq original_status
expect(status.reply?).to be true
expect(status.in_reply_to_account).to eq original_status.account
expect(status.conversation).to eq original_status.conversation
end
end
context 'with mentions' do
let(:recipient) { Fabricate(:account) }
let(:object_json) do
{
id: 'bar',
type: 'Note',
content: 'Lorem ipsum',
tag: [
{
type: 'Mention',
href: ActivityPub::TagManager.instance.uri_for(recipient),
},
],
}
end
it 'creates status' do
status = sender.statuses.first
expect(status).to_not be_nil
expect(status.mentions.map(&:account)).to include(recipient)
end
end
context 'with media attachments' do
let(:object_json) do
{
id: 'bar',
type: 'Note',
content: 'Lorem ipsum',
attachment: [
{
type: 'Document',
mime_type: 'image/png',
url: 'http://example.com/attachment.png',
},
],
}
end
it 'creates status' do
status = sender.statuses.first
expect(status).to_not be_nil
expect(status.media_attachments.map(&:remote_url)).to include('http://example.com/attachment.png')
end
end
context 'with hashtags' do
let(:object_json) do
{
id: 'bar',
type: 'Note',
content: 'Lorem ipsum',
tag: [
{
type: 'Hashtag',
href: 'http://example.com/blah',
name: '#test',
},
],
}
end
it 'creates status' do
status = sender.statuses.first
expect(status).to_not be_nil
expect(status.tags.map(&:name)).to include('test')
end
end
end
end

28
spec/lib/activitypub/activity/delete_spec.rb Normal file
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@ -0,0 +1,28 @@
require 'rails_helper'
RSpec.describe ActivityPub::Activity::Delete do
let(:sender) { Fabricate(:account) }
let(:status) { Fabricate(:status, account: sender, uri: 'foobar') }
let(:json) do
{
'@context': 'https://www.w3.org/ns/activitystreams',
id: 'foo',
type: 'Delete',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: ActivityPub::TagManager.instance.uri_for(status),
}.with_indifferent_access
end
describe '#perform' do
subject { described_class.new(json, sender) }
before do
subject.perform
end
it 'deletes sender\'s status' do
expect(Status.find_by(id: status.id)).to be_nil
end
end
end

28
spec/lib/activitypub/activity/follow_spec.rb Normal file
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@ -0,0 +1,28 @@
require 'rails_helper'
RSpec.describe ActivityPub::Activity::Follow do
let(:sender) { Fabricate(:account) }
let(:recipient) { Fabricate(:account) }
let(:json) do
{
'@context': 'https://www.w3.org/ns/activitystreams',
id: 'foo',
type: 'Follow',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: ActivityPub::TagManager.instance.uri_for(recipient),
}.with_indifferent_access
end
describe '#perform' do
subject { described_class.new(json, sender) }
before do
subject.perform
end
it 'creates a follow from sender to recipient' do
expect(sender.following?(recipient)).to be true
end
end
end

29
spec/lib/activitypub/activity/like_spec.rb Normal file
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@ -0,0 +1,29 @@
require 'rails_helper'
RSpec.describe ActivityPub::Activity::Like do
let(:sender) { Fabricate(:account) }
let(:recipient) { Fabricate(:account) }
let(:status) { Fabricate(:status, account: recipient) }
let(:json) do
{
'@context': 'https://www.w3.org/ns/activitystreams',
id: 'foo',
type: 'Like',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: ActivityPub::TagManager.instance.uri_for(status),
}.with_indifferent_access
end
describe '#perform' do
subject { described_class.new(json, sender) }
before do
subject.perform
end
it 'creates a favourite from sender to status' do
expect(sender.favourited?(status)).to be true
end
end
end

107
spec/lib/activitypub/activity/undo_spec.rb Normal file
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@ -0,0 +1,107 @@
require 'rails_helper'
RSpec.describe ActivityPub::Activity::Undo do
let(:sender) { Fabricate(:account) }
let(:json) do
{
'@context': 'https://www.w3.org/ns/activitystreams',
id: 'foo',
type: 'Undo',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: object_json,
}.with_indifferent_access
end
subject { described_class.new(json, sender) }
describe '#perform' do
context 'with Announce' do
let(:status) { Fabricate(:status) }
let(:object_json) do
{
id: 'bar',
type: 'Announce',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: ActivityPub::TagManager.instance.uri_for(status),
}
end
before do
Fabricate(:status, reblog: status, account: sender, uri: 'bar')
end
it 'deletes the reblog' do
subject.perform
expect(sender.reblogged?(status)).to be false
end
end
context 'with Block' do
let(:recipient) { Fabricate(:account) }
let(:object_json) do
{
id: 'bar',
type: 'Block',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: ActivityPub::TagManager.instance.uri_for(recipient),
}
end
before do
sender.block!(recipient)
end
it 'deletes block from sender to recipient' do
subject.perform
expect(sender.blocking?(recipient)).to be false
end
end
context 'with Follow' do
let(:recipient) { Fabricate(:account) }
let(:object_json) do
{
id: 'bar',
type: 'Follow',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: ActivityPub::TagManager.instance.uri_for(recipient),
}
end
before do
sender.follow!(recipient)
end
it 'deletes follow from sender to recipient' do
subject.perform
expect(sender.following?(recipient)).to be false
end
end
context 'with Like' do
let(:status) { Fabricate(:status) }
let(:object_json) do
{
id: 'bar',
type: 'Like',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: ActivityPub::TagManager.instance.uri_for(status),
}
end
before do
Fabricate(:favourite, account: sender, status: status)
end
it 'deletes favourite from sender to status' do
subject.perform
expect(sender.favourited?(status)).to be false
end
end
end
end

41
spec/lib/activitypub/activity/update_spec.rb Normal file
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@ -0,0 +1,41 @@
require 'rails_helper'
RSpec.describe ActivityPub::Activity::Update do
let!(:sender) { Fabricate(:account) }
before do
sender.update!(uri: ActivityPub::TagManager.instance.uri_for(sender))
end
let(:modified_sender) do
sender.dup.tap do |modified_sender|
modified_sender.display_name = 'Totally modified now'
end
end
let(:actor_json) do
ActiveModelSerializers::SerializableResource.new(modified_sender, serializer: ActivityPub::ActorSerializer, key_transform: :camel_lower).as_json
end
let(:json) do
{
'@context': 'https://www.w3.org/ns/activitystreams',
id: 'foo',
type: 'Update',
actor: ActivityPub::TagManager.instance.uri_for(sender),
object: actor_json,
}.with_indifferent_access
end
describe '#perform' do
subject { described_class.new(json, sender) }
before do
subject.perform
end
it 'updates profile' do
expect(sender.reload.display_name).to eq 'Totally modified now'
end
end
end

99
spec/lib/activitypub/tag_manager_spec.rb Normal file
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@ -0,0 +1,99 @@
require 'rails_helper'
RSpec.describe ActivityPub::TagManager do
include RoutingHelper
subject { described_class.instance }
describe '#url_for' do
it 'returns a string' do
account = Fabricate(:account)
expect(subject.url_for(account)).to be_a String
end
end
describe '#uri_for' do
it 'returns a string' do
account = Fabricate(:account)
expect(subject.uri_for(account)).to be_a String
end
end
describe '#to' do
it 'returns public collection for public status' do
status = Fabricate(:status, visibility: :public)
expect(subject.to(status)).to eq ['https://www.w3.org/ns/activitystreams#Public']
end
it 'returns followers collection for unlisted status' do
status = Fabricate(:status, visibility: :unlisted)
expect(subject.to(status)).to eq [account_followers_url(status.account)]
end
it 'returns followers collection for private status' do
status = Fabricate(:status, visibility: :private)
expect(subject.to(status)).to eq [account_followers_url(status.account)]
end
it 'returns URIs of mentions for direct status' do
status = Fabricate(:status, visibility: :direct)
mentioned = Fabricate(:account)
status.mentions.create(account: mentioned)
expect(subject.to(status)).to eq [subject.uri_for(mentioned)]
end
end
describe '#cc' do
it 'returns followers collection for public status' do
status = Fabricate(:status, visibility: :public)
expect(subject.cc(status)).to eq [account_followers_url(status.account)]
end
it 'returns public collection for unlisted status' do
status = Fabricate(:status, visibility: :unlisted)
expect(subject.cc(status)).to eq ['https://www.w3.org/ns/activitystreams#Public']
end
it 'returns empty array for private status' do
status = Fabricate(:status, visibility: :private)
expect(subject.cc(status)).to eq []
end
it 'returns empty array for direct status' do
status = Fabricate(:status, visibility: :direct)
expect(subject.cc(status)).to eq []
end
it 'returns URIs of mentions for non-direct status' do
status = Fabricate(:status, visibility: :public)
mentioned = Fabricate(:account)
status.mentions.create(account: mentioned)
expect(subject.cc(status)).to include(subject.uri_for(mentioned))
end
end
describe '#local_uri?' do
it 'returns false for non-local URI' do
expect(subject.local_uri?('http://example.com/123')).to be false
end
it 'returns true for local URIs' do
account = Fabricate(:account)
expect(subject.local_uri?(subject.uri_for(account))).to be true
end
end
describe '#uri_to_local_id' do
it 'returns the local ID' do
account = Fabricate(:account)
expect(subject.uri_to_local_id(subject.uri_for(account), :username)).to eq account.username
end
end
describe '#uri_to_resource' do
it 'returns the local resource' do
account = Fabricate(:account)
expect(subject.uri_to_resource(subject.uri_for(account), Account)).to eq account
end
end
end

96
spec/services/activitypub/fetch_remote_account_service_spec.rb Normal file
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@ -0,0 +1,96 @@
require 'rails_helper'
RSpec.describe ActivityPub::FetchRemoteAccountService do
subject { ActivityPub::FetchRemoteAccountService.new }
let!(:actor) do
{
'@context': 'https://www.w3.org/ns/activitystreams',
id: 'https://example.com/alice',
type: 'Person',
preferredUsername: 'alice',
name: 'Alice',
summary: 'Foo bar',
}
end
describe '#call' do
let(:account) { subject.call('https://example.com/alice') }
shared_examples 'sets profile data' do
it 'returns an account' do
expect(account).to be_an Account
end
it 'sets display name' do
expect(account.display_name).to eq 'Alice'
end
it 'sets note' do
expect(account.note).to eq 'Foo bar'
end
it 'sets URL' do
expect(account.url).to eq 'https://example.com/alice'
end
end
context 'when URI and WebFinger share the same host' do
let!(:webfinger) { { subject: 'acct:alice@example.com', links: [{ rel: 'self', href: 'https://example.com/alice' }] } }
before do
stub_request(:get, 'https://example.com/alice').to_return(body: Oj.dump(actor))
stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
end
it 'fetches resource' do
account
expect(a_request(:get, 'https://example.com/alice')).to have_been_made.once
end
it 'looks up webfinger' do
account
expect(a_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com')).to have_been_made.once
end
it 'sets username and domain from webfinger' do
expect(account.username).to eq 'alice'
expect(account.domain).to eq 'example.com'
end
include_examples 'sets profile data'
end
context 'when WebFinger presents different domain than URI' do
let!(:webfinger) { { subject: 'acct:alice@iscool.af', links: [{ rel: 'self', href: 'https://example.com/alice' }] } }
before do
stub_request(:get, 'https://example.com/alice').to_return(body: Oj.dump(actor))
stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
stub_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af').to_return(body: Oj.dump(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
end
it 'fetches resource' do
account
expect(a_request(:get, 'https://example.com/alice')).to have_been_made.once
end
it 'looks up webfinger' do
account
expect(a_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com')).to have_been_made.once
end
it 'looks up "redirected" webfinger' do
account
expect(a_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af')).to have_been_made.once
end
it 'sets username and domain from final webfinger' do
expect(account.username).to eq 'alice'
expect(account.domain).to eq 'iscool.af'
end
include_examples 'sets profile data'
end
end
end

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spec/services/activitypub/fetch_remote_status_service_spec.rb Normal file
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require 'rails_helper'
RSpec.describe ActivityPub::FetchRemoteStatusService do
pending
end

5
spec/services/activitypub/process_account_service_spec.rb Normal file
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require 'rails_helper'
RSpec.describe ActivityPub::ProcessAccountService do
pending
end

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spec/services/activitypub/process_collection_service_spec.rb Normal file
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require 'rails_helper'
RSpec.describe ActivityPub::ProcessCollectionService do
subject { ActivityPub::ProcessCollectionService.new }
describe '#call' do
pending
end
end