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
|
helpers do
def protected!
redirect("/login.html") unless session['client']
end
# https://github.com/mastodon/mastodon/blob/main/app/controllers/concerns/signature_verification.rb
def verify!
# TODO verify digest
begin
signature_params = {}
request.env["HTTP_SIGNATURE"].split(',').each do |pair|
k, v = pair.split('=')
signature_params[k] = v.gsub('"', '')
end
key_id = signature_params['keyId']
headers = signature_params['headers']
signature = Base64.decode64(signature_params['signature'])
actor = fetch key_id
key = OpenSSL::PKey::RSA.new(actor['publicKey']['publicKeyPem'])
comparison = headers.split(' ').map do |signed_params_name|
if signed_params_name == '(request-target)'
'(request-target): post /inbox'
elsif signed_params_name == 'content-type'
"#{signed_params_name}: #{request.env["CONTENT_TYPE"]}"
else
"#{signed_params_name}: #{request.env["HTTP_" + signed_params_name.upcase]}"
end
end.join("\n")
halt 400 unless key.verify(OpenSSL::Digest.new('SHA256'), signature, comparison)
rescue => e
p request.env["HTTP_SIGNATURE"], e
halt 400
end
end
def items
nr = 0
@items = Dir[File.join(@dir, '*.json')].sort.collect do |file|
item = JSON.parse(File.read(file))
mention = mention(item['attributedTo'])
following_path = File.join('public', 'following', mention + '.json')
File.exists?(following_path) ? follow = 'unfollow' : follow = 'follow'
nr += 1
{ :id => item['id'],
:nr => nr,
:parent => item['inReplyTo'],
:file => file,
:actor_url => item['attributedTo'],
:mention => mention,
:follow => follow,
:content => item['content'],
:attachment => item['attachment'],
:indent => 2,
:replies => []
}
end.compact
@items.last[:nr] = @items.last[:nr] - 2 unless @items.empty?
end
def threads
items
@threads = []
@items.each do |i|
if i[:parent].nil? or @items.select{|it| it[:id] == i[:parent] }.empty?
@threads << i
else
@items.select{|it| it[:id] == i[:parent] }.each do |it|
i[:indent] = it[:indent] + 2
it[:replies] << i
end
end
end
end
def html item
@item = item
erb :item
end
def delete object
Dir["inbox/*.json"].each do |doc|
FileUtils.rm doc if JSON.parse(File.read(doc))["id"] == object["id"]
end
end
def create object
unless object['type'] == 'Person'
doc = File.join("inbox", "#{Time.now.strftime('%Y-%m-%dT%H:%M:%S.%N')}.json")
File.open(doc, "w+") { |f| f.puts object.to_json }
if object['inReplyTo']
@dir = 'inbox'
items
if @items.select{|it| it[:id] == object['inReplyTo'] }.empty?
download object['inReplyTo']
end
end
end
end
def download object_url
create fetch(object_url)
end
def people
File.read('cache/people.tsv').split("\n").collect {|l| l.chomp.split("\t")}
end
def mention actor
person = people.select{|p| p[1] == actor}
if person.empty?
mention = "#{fetch(actor)["preferredUsername"]}@#{URI(actor).host}"
File.open('cache/people.tsv','a'){|f| f.puts "#{mention}\t#{actor}"}
mention
else
person[0][0]
end
end
def actor mention
mention = mention.sub(/^@/, '').chomp
actors = people.select{|p| p[0] == mention}
if actors.empty?
user, server = mention.split("@")
actor = fetch("https://#{server}/.well-known/webfinger?resource=acct:#{mention}",
"application/jrd+json")["links"].select { |l|
l["rel"] == "self"
}[0]["href"]
File.open('cache/people.tsv','a'){|f| f.puts "#{mention}\t#{actor}"}
actor
else
actors[0][1]
end
end
def fetch url, accept = 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'
p url
response = `/run/current-system/sw/bin/curl --fail-with-body -sSL -H 'Accept: #{accept}' #{url}`
halt 400 unless $?.success?
JSON.parse(response)
end
def ordered_collection dir
posts = Dir[File.join("public",dir, "*.json")].collect { |f| JSON.parse(File.read f) }.sort_by { |o| o["published"] }
{
"@context" => "https://www.w3.org/ns/activitystreams",
"summary" => "#{USER} #{dir}",
"type" => "OrderedCollection",
"totalItems" => posts.size,
"orderedItems" => posts,
}
end
# https://github.com/mastodon/mastodon/blob/main/app/lib/request.rb
def send_signed object, url
keypair = OpenSSL::PKey::RSA.new(File.read('private.pem'))
date = Time.now.utc.httpdate
sha256 = OpenSSL::Digest::SHA256.new
body = object.to_json
digest = "SHA-256=" + sha256.base64digest(body)
host = URI.parse(url).host
inbox = fetch(url)["inbox"]
request_uri = URI(inbox).request_uri
signed_string = "(request-target): post #{request_uri}\nhost: #{host}\ndate: #{date}\ndigest: #{digest}\ncontent-type: application/activity+json"
signature = Base64.strict_encode64(keypair.sign(OpenSSL::Digest.new('SHA256'), signed_string))
signed_header = 'keyId="' + ACTOR + '#main-key",algorithm="rsa-sha256",headers="(request-target) host date digest content-type",signature="' + signature + '"'
puts `/run/current-system/sw/bin/curl --fail-with-body -sSL -X POST -H 'Content-Type: application/activity+json' -H 'Host: #{host}' -H 'Date: #{date}' -H 'Digest: #{digest}' -H 'Signature: #{signed_header}' -d '#{body}' #{inbox}`
end
end
|
