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
|
require 'English'
helpers do
# add date and id, save
def save_activity(activity, box)
date = Time.now.utc.iso8601
activity['published'] ||= date # if box == OUTBOX
basename = "#{activity['published']}_#{mention(activity['actor'])}.json"
activity_rel_path = File.join(activity['type'].downcase, basename)
activity_path = File.join(box[:dir], activity_rel_path)
if box == OUTBOX
# return unless activity['to'].include? 'https://www.w3.org/ns/activitystreams#Public' # save only public messages
activity['id'] = File.join(box[:url], activity_rel_path)
activity['object']['published'] = date unless activity['object'].is_a? String
# save object
save_object activity['object'], box if %w[Create Announce Update].include? activity['type']
end
# save activity
FileUtils.mkdir_p File.dirname(activity_path)
File.open(activity_path, 'w+') { |f| f.puts activity.to_json }
activity_path
end
def save_object(object, box)
object = fetch(object) if object.is_a? String and object.match(/^http/)
return unless object and object['type'] != 'Person'
# File.open(File.join(INBOX[:dir]), 'visited', 'w+').open { |f| f.puts object['id'] }
return if box == INBOX and object['id'] and File.readlines(File.join(INBOX[:dir], 'visited'),
chomp: true).include? object['id']
object['@context'] = 'https://www.w3.org/ns/activitystreams'
if object['attributedTo']
basename = "#{object['published']}_#{mention(object['attributedTo'])}.json"
else
basename = "#{object['published']}.json"
jj object
end
object_rel_path = File.join 'object', object['type'].downcase, basename
object['id'] ||= File.join box[:url], object_rel_path # if box == OUTBOX
object_path = File.join box[:dir], object_rel_path
FileUtils.mkdir_p File.dirname(object_path)
File.open(object_path, 'w+') { |f| f.puts object.to_json }
if box == OUTBOX and 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
elsif box == INBOX
File.open(File.join(INBOX[:dir], 'visited'), 'a+') { |f| f.puts object['id'] }
end
object
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|
id = object['id'] || object
if delete
collection['orderedItems'].delete_if { |o| o['id'] == id or o == id }
else
ids = collection['orderedItems'].collect { |i| i['id'] }
collection['orderedItems'] << object unless ids.include?(id) or collection['orderedItems'].include?(id)
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')
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
)
response ? JSON.parse(response) : nil
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 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.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('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_file(id)
Dir[File.join('*', 'object', '*', '*.json')].find do |f|
JSON.load_file(f)['id'] == id
end
end
def find_id(id, return_filename = true)
Dir[File.join('**', '*.json')].find do |f|
content = JSON.load_file(f)
if content['id'] == id
return_filename ? f : content
end
end
end
end
|
