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
|
# frozen_string_literal: true
require 'English'
helpers do
def outbox(type, object, recipients, add_recipients = false)
activity = {
'@context' => 'https://www.w3.org/ns/activitystreams',
'type' => type,
'actor' => ACTOR,
'object' => object
}
now = Time.now
date = now.strftime('%Y-%m-%dT%H:%M:%S.%N')
httpdate = now.utc.httpdate
basename = "#{date}.json"
activity_rel_path = File.join(type.downcase, basename)
activity_path = File.join(OUTBOX_DIR, activity_rel_path)
activity['id'] = File.join(OUTBOX_URL, activity_rel_path)
activity['published'] = httpdate
# save object
if activity['object'] && activity['object']['type'] && !activity['object']['id']
object = activity['object']
object['@context'] = 'https://www.w3.org/ns/activitystreams'
object_rel_path = File.join activity['object']['type'].downcase, basename
object_path = File.join OUTBOX_DIR, object_rel_path
object['id'] = File.join OUTBOX_URL, object_rel_path
object['published'] = httpdate
FileUtils.mkdir_p File.dirname(object_path)
File.open(object_path, 'w+') { |f| f.puts object.to_json }
end
# save activity
FileUtils.mkdir_p File.dirname(activity_path)
File.open(activity_path, 'w+') { |f| f.puts activity.to_json }
update_collection OUTBOX, activity['id']
# if type == 'Follow'
# jj activity
# update_collection FOLLO, activity['id']
# end
# send
# https://github.com/mastodon/mastodon/blob/main/app/lib/request.rb
keypair = OpenSSL::PKey::RSA.new(File.read('private.pem'))
body = activity.to_json
sha256 = OpenSSL::Digest.new('SHA256')
digest = "SHA-256=#{sha256.base64digest(body)}"
# assumes that recipient collections have been expanded by sender
# put all recipients into 'to', avoid 'cc' 'bto' 'bcc' 'audience' !!
activity['to'] = recipients if add_recipients
inboxes = []
recipients.uniq.each do |url|
next if [ACTOR, 'https://www.w3.org/ns/activitystreams#Public'].include? url
actor = fetch url
next unless actor
if actor['endpoints'] and actor['endpoints']['sharedInbox']
inboxes << actor['endpoints']['sharedInbox']
elsif actor['inbox']
inboxes << actor['inbox']
end
end
inboxes.compact.uniq.each do |inbox|
uri = URI(inbox)
string = "(request-target): post #{uri.request_uri}\nhost: #{uri.host}\ndate: #{httpdate}\ndigest: #{digest}\ncontent-type: application/activity+json"
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}\""
curl(
"-X POST -H 'Content-Type: application/activity+json' -H 'Host: #{uri.host}' -H 'Date: #{httpdate}' -H 'Digest: #{digest}' -H 'Signature: #{signed_header}' -d '#{body}'", inbox
)
end
end
def update_collection(path, objects, delete = false)
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|
if delete
collection['orderedItems'].delete_if { |o| o['id'] == object['id'] }
modified = true
else
ids = collection['orderedItems'].collect { |i| i['id'] }
collection['orderedItems'] << object unless ids.include?(object['id'])
modified = true
end
end
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')
uri = URI(url)
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
)
# response = curl("-H 'Accept: #{accept}'", url)
response ? JSON.parse(response) : nil
end
def curl(ext, url)
p url
response = `/run/current-system/sw/bin/curl --fail-with-body -sSL #{ext} #{url}`
if $CHILD_STATUS.success?
response
else
p 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.sub(/^@/, '').chomp
actors = people.select { |p| p[0] == mention }
if actors.empty?
_, server = mention.split('@')
a = fetch("https://#{server}/.well-known/webfinger?resource=acct:#{mention}", '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('private/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('private/people.tsv', 'a') { |f| f.puts "#{mention}\t#{actor}\t#{sharedInbox}" }
end
end
|
