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
208
209
210
211
212
213
214
215
216
217
218
|
require 'English'
helpers do
def save_item(item, path)
FileUtils.mkdir_p File.dirname(path)
File.open(path, 'w+') { |f| f.puts item.to_json }
end
def create_activity(type, object, to)
date = Time.now.utc.iso8601
rel_path = File.join(type.downcase, "#{date}.json")
activity = {
'@context' => 'https://www.w3.org/ns/activitystreams',
'id' => File.join(OUTBOX[:url], rel_path),
'type' => type,
'actor' => ACTOR,
'published' => date,
'to' => to,
'object' => object
}
unless activity['object'].is_a? String
object_rel_path = File.join('object', object['type'].downcase, "#{date}.json")
object = activity['object']
object['@context'] = 'https://www.w3.org/ns/activitystreams'
object['id'] = File.join(OUTBOX[:url], object_rel_path)
object['published'] = date
save_item activity['object'], File.join(OUTBOX[:dir], object_rel_path)
if object['tag']
object['tag'].each do |tag|
next unless tag['type'] == 'Hashtag'
tag_path = File.join(TAGS[:dir], tag['name'].sub('#', '')) + '.json'
tag_collection = if File.exist? tag_path
JSON.load_file(tag_path)
else
{
'@context' => 'https://www.w3.org/ns/activitystreams',
'id' => tag['href'],
'type' => 'OrderedCollection',
'totalItems' => 0,
'orderedItems' => []
}
end
tag_collection['orderedItems'] << object['id']
tag_collection['totalItems'] = tag_collection['orderedItems'].size
File.open(tag_path, 'w+') do |f|
f.puts tag_collection.to_json
end
end
end
end
activity_path = File.join(OUTBOX[:dir], rel_path)
save_item activity, activity_path
send_activity activity, activity_path
end
def send_activity(activity, activity_path)
to = activity['to'].is_a?(String) ? [activity['to']] : activity['to']
inboxes = []
to.uniq.each do |url|
next if [ACTOR, 'https://www.w3.org/ns/activitystreams#Public'].include? url
if url == FOLLOWERS_URL
JSON.load_file(FOLLOWERS)['orderedItems'].each do |follower|
inboxes << actor_inbox(follower)
end
next
end
inboxes << actor_inbox(url)
end
sha256 = OpenSSL::Digest.new('SHA256')
digest = "SHA-256=#{sha256.base64digest(File.read(activity_path))}"
keypair = OpenSSL::PKey::RSA.new(File.read('private.pem'))
inboxes.compact.uniq.each do |inbox|
uri = URI(inbox)
httpdate = Time.now.utc.httpdate
string = "(request-target): post #{uri.request_uri}\nhost: #{uri.host}\ndate: #{httpdate}\ndigest: #{digest}\ncontent-type: #{CONTENT_TYPE}"
signature = Base64.strict_encode64(keypair.sign(OpenSSL::Digest.new('SHA256'), string))
signed_header = "keyId=\"#{ACTOR}#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) host date digest content-type\",signature=\"#{signature}\""
# Net::HTTP fails with OpenSSL error
curl(
"-X POST -H 'Host: #{uri.host}' -H 'Date: #{httpdate}' -H 'Digest: #{digest}' -H 'Signature: #{signed_header}' --data-binary '@#{activity_path}'", inbox
)
end
end
def actor_inbox(url)
actor = fetch url
return unless actor
if actor['endpoints'] and actor['endpoints']['sharedInbox']
actor['endpoints']['sharedInbox']
elsif actor['inbox']
actor['inbox']
end
end
def update_collection(path, objects, action = 'add')
objects = [objects] unless objects.is_a? Array
File.open(path, 'r+') do |f|
f.flock(File::LOCK_EX)
json = f.read
collection = JSON.parse(json)
objects.each do |object|
id = object['id'] || object
if action == 'delete'
collection['orderedItems'].delete_if { |o| o['id'] == id or o == id }
elsif action == 'add'
ids = collection['orderedItems'].collect { |i| i['id'] }
collection['orderedItems'] << object unless ids.include?(id) or collection['orderedItems'].include?(id)
end
end
collection['orderedItems'].uniq!
collection['totalItems'] = collection['orderedItems'].size
f.rewind
f.puts collection.to_json
f.truncate(f.pos)
end
end
def fetch(url, accept = 'application/activity+json')
begin
uri = URI(url)
rescue StandardError => e
p url, e
return nil
end
httpdate = Time.now.utc.httpdate
keypair = OpenSSL::PKey::RSA.new(File.read('private.pem'))
string = "(request-target): get #{uri.request_uri}\nhost: #{uri.host}\ndate: #{httpdate}"
signature = Base64.strict_encode64(keypair.sign(OpenSSL::Digest.new('SHA256'), string))
signed_header = "keyId=\"#{ACTOR}#main-key\",algorithm=\"rsa-sha256\",headers=\"(request-target) host date\",signature=\"#{signature}\""
response = curl(
"-H 'Accept: #{accept}' -H 'Host: #{uri.host}' -H 'Date: #{httpdate}' -H 'Signature: #{signed_header}' ", url
)
return unless response
begin
JSON.parse(response)
rescue StandardError => e
p url, e
nil
end
end
def curl(ext, url)
response = `/run/current-system/sw/bin/curl -H 'Content-Type: #{CONTENT_TYPE}' -H 'Accept: #{CONTENT_TYPE}' --fail-with-body -sSL #{ext} #{url}`
if $CHILD_STATUS.success?
response
else
p 'Curl Error:', url, response
nil
end
end
def mention(actor)
person = people.select { |p| p[1] == actor }
if person.empty?
a = fetch(actor)
return nil unless a
mention = "@#{a['preferredUsername']}@#{URI(actor).host}"
cache mention, actor, a
mention
else
person[0][0]
end
end
def actor(mention)
mention = mention.chomp
actors = people.select { |p| p[0] == mention }
if actors.empty?
server = mention.split('@').last
a = fetch("https://#{server}/.well-known/webfinger?resource=acct:#{mention.sub(/^@/, '')}",
'application/jrd+json')
return nil unless a
actor = a['links'].select do |l|
l['rel'] == 'self'
end[0]['href']
cache mention, actor, a
actor
else
actors[0][1]
end
end
def people
File.read('public/people.tsv').split("\n").collect { |l| l.chomp.split("\t") }
end
def cache(mention, actor, a)
sharedInbox = a['endpoints']['sharedInbox'] if a['endpoints'] && a['endpoints']['sharedInbox']
File.open('public/people.tsv', 'a') { |f| f.puts "#{mention}\t#{actor}\t#{sharedInbox}" }
end
def media_type(url) # TODO: extend extensions
extensions = {
image: %w[jpeg jpg png tiff webp],
audio: %w[flac wav mp3 ogg aiff],
video: %w[mp4 webm]
}
ext = File.extname(url).sub('.', '').downcase
type = extensions.find { |_k, v| v.include? ext }
"#{type[0]}/#{ext}"
end
def find_object(id)
Dir[File.join('*', '**', '*.json')].each do |file|
object = JSON.load_file(file)
return [file, object] if object['id'] == id
end
end
end
|
