1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
# frozen_string_literal: true
class ResolveAccountService < BaseService
include OStatus2::MagicKey
include JsonLdHelper
DFRN_NS = 'http://purl.org/macgirvin/dfrn/1.0'
# Find or create a local account for a remote user.
# When creating, look up the user's webfinger and fetch all
# important information from their feed
# @param [String] uri User URI in the form of username@domain
# @return [Account]
def call(uri, update_profile = true, redirected = nil)
@username, @domain = uri.split('@')
@update_profile = update_profile
return Account.find_local(@username) if TagManager.instance.local_domain?(@domain)
@account = Account.find_remote(@username, @domain)
return @account unless webfinger_update_due?
Rails.logger.debug "Looking up webfinger for #{uri}"
@webfinger = Goldfinger.finger("acct:#{uri}")
confirmed_username, confirmed_domain = @webfinger.subject.gsub(/\Aacct:/, '').split('@')
if confirmed_username.casecmp(@username).zero? && confirmed_domain.casecmp(@domain).zero?
@username = confirmed_username
@domain = confirmed_domain
elsif redirected.nil?
return call("#{confirmed_username}@#{confirmed_domain}", update_profile, true)
else
Rails.logger.debug 'Requested and returned acct URIs do not match'
return
end
return if links_missing?
return Account.find_local(@username) if TagManager.instance.local_domain?(@domain)
RedisLock.acquire(lock_options) do |lock|
if lock.acquired?
@account = Account.find_remote(@username, @domain)
if activitypub_ready? || @account&.activitypub?
handle_activitypub
else
handle_ostatus
end
end
end
@account
rescue Goldfinger::Error => e
Rails.logger.debug "Webfinger query for #{uri} unsuccessful: #{e}"
nil
end
private
def links_missing?
!(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?)
end
def webfinger_update_due?
@account.nil? || @account.possibly_stale?
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) &&
!actor_json.nil? &&
actor_json['inbox'].present?
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
return if actor_json.nil?
@account = ActivityPub::ProcessAccountService.new.call(@username, @domain, actor_json)
rescue Oj::ParseError
nil
end
def create_account
Rails.logger.debug "Creating new remote account for #{@username}@#{@domain}"
@account = Account.new(username: @username, domain: @domain)
@account.suspended = true if auto_suspend?
@account.silenced = true if auto_silence?
@account.private_key = nil
end
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
@account.public_key = public_key
@account.uri = canonical_uri
@account.hub_url = hub_url
@account.save!
end
def auto_suspend?
domain_block&.suspend?
end
def auto_silence?
domain_block&.silence?
end
def domain_block
return @domain_block if defined?(@domain_block)
@domain_block = DomainBlock.find_by(domain: @domain)
end
def atom_url
@atom_url ||= @webfinger.link('http://schemas.google.com/g/2010#updates-from').href
end
def salmon_url
@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
def public_key
@public_key ||= magic_key_to_pem(@webfinger.link('magic-public-key').href)
end
def canonical_uri
return @canonical_uri if defined?(@canonical_uri)
author_uri = atom.at_xpath('/xmlns:feed/xmlns:author/xmlns:uri')
if author_uri.nil?
owner = atom.at_xpath('/xmlns:feed').at_xpath('./dfrn:owner', dfrn: DFRN_NS)
author_uri = owner.at_xpath('./xmlns:uri') unless owner.nil?
end
@canonical_uri = author_uri.nil? ? nil : author_uri.content
end
def hub_url
return @hub_url if defined?(@hub_url)
hubs = atom.xpath('//xmlns:link[@rel="hub"]')
@hub_url = hubs.empty? || hubs.first['href'].nil? ? nil : hubs.first['href']
end
def atom_body
return @atom_body if defined?(@atom_body)
@atom_body = Request.new(:get, atom_url).perform do |response|
raise Mastodon::UnexpectedResponseError, response unless response.code == 200
response.body_with_limit
end
end
def actor_json
return @actor_json if defined?(@actor_json)
json = fetch_resource(actor_url, false)
@actor_json = supported_context?(json) && json['type'] == 'Person' ? json : nil
end
def atom
return @atom if defined?(@atom)
@atom = Nokogiri::XML(atom_body)
end
def update_account_profile
RemoteProfileUpdateWorker.perform_async(@account.id, atom_body.force_encoding('UTF-8'), false)
end
def lock_options
{ redis: Redis.current, key: "resolve:#{@username}@#{@domain}" }
end
end
|
