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Add ActivityPub inbox (#4216) 

* 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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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
View File

@ -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
View File

@ -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
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@ -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
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@ -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

5
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