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
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
|
# TODO
# boost
# archive
# threads
# federation
# client post media
# test with pleroma etc
=begin
require 'json'
require 'uri'
require 'base64'
require 'securerandom'
require 'fileutils'
require 'digest/sha2'
require 'nokogiri'
=end
require 'net/http'
require 'sinatra'
USER = "pdp8"
WWW_DOMAIN = "pdp8.info"
WWW_URL = "https://#{WWW_DOMAIN}"
SOCIAL_DOMAIN = "social.#{WWW_DOMAIN}"
ACCOUNT = "#{USER}@#{SOCIAL_DOMAIN}"
SOCIAL_URL = "https://#{SOCIAL_DOMAIN}"
ACTOR = File.join(SOCIAL_URL, USER)
use Rack::Reloader
set :default_content_type, 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'
set :port, 9292
post "/inbox" do
request.body.rewind # in case someone already read it
body = request.body.read
object = JSON.parse body
case object["type"]
when "Create"
File.open(File.join("inbox", "#{object["published"]}-#{mention object["actor"]}.json"), "w+") { |f|
f.puts object["object"].to_json
}
end
end
get "/.well-known/webfinger" do
if request["resource"] == "acct:#{ACCOUNT}"
send_file "./webfinger", :type => "application/jrd+json"
else
404
end
end
get "/inbox", :provides => 'html' do
template = "<!DOCTYPE html>
<html lang='en'>
<body>
<% Dir['./inbox/*'].sort.each do |file| %>
<% item = JSON.parse(File.read(file)) %>
<b><%= mention item['actor'] %></b> <i><%= item['published'].sub('T', ' ') %></i>
<p><%= item['content'] %>
<% if item['attachment']
item['attachment'].each do |att|
case att['mediaType']
when /audio/ %>
<br><audio controls=''><source src='<%= att['url'] %>' type='<%= att['mediaType'] %>'></audio>
<% when /image/ %>
<br><a href='<%= att['url'] %>'><img src='<%= att['url'] %>'></a>
<% when /video/ %>
<br><video controls=''><source src='<%= att['url'] %>' type='<%= att['mediaType'] %>'></video>
<% else %>
<%= att %><br>
<a href='<%= att['url'] %>'><%= att['url'] %></a>
<% end %>
<% end %>
<% end %>
<p>
<form action='<%= File.join 'delete', file %>' method='post'>
<button>Delete</button>
</form>
<form action='<%= File.join 'boost', file %>' method='post'>
<button>Boost</button>
</form>
<form action='<%= File.join 'archive', file %>' method='post'>
<button>Archive</button>
</form>
<form action='<%= File.join 'reply', file %>' method='post'>
<button>Reply</button>
</form>
<hr>
<% end %>
</body>
</html>"
erb template
end
get "/inbox", :provides => 'json' do
ordered_collection("inbox").to_json
end
def mention actor
"#{get(actor)["preferredUsername"]}@#{URI(actor).host}"
end
def get url, accept = 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'
uri = URI(url)
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
header = { 'Accept' => accept }
request = Net::HTTP::Get.new(uri.request_uri, header)
response = http.request(request)
JSON.parse(response.body)
end
def ordered_collection dir
posts = Dir[File.join(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
=begin
post "/outbox" do
end
class Application
def call(env)
code = 404
type = 'application/ld+json; profile="https://www.w3.org/ns/activitystreams"'
response = "Not found."
case env['REQUEST_METHOD']
when 'POST'
input = env["rack.input"].read
case env["REQUEST_PATH"]
when "/inbox" # receive from server
if verify(env)
begin
object = JSON.parse(input)
case object["type"]
when "Delete"
puts input
when "Follow"
File.open(File.join("followers", SecureRandom.uuid + ".json"), "w+") { |f| f.puts input }
accept = { "@context" => "https://www.w3.org/ns/activitystreams",
"id" => File.join(SOCIAL_URL + "#accepts", SecureRandom.uuid),
"type" => "Accept",
"actor" => ACTOR,
"object" => JSON.parse(input) }
send accept, [accept["object"]["actor"]]
when "Undo"
o = object["object"]
case o["type"]
when "Follow"
Dir["followers/*.json"].each do |follower|
if JSON.parse(File.read(follower))["actor"] == o["actor"]
FileUtils.rm follower
end
end
else
puts input
end
else
puts input
end
code = 200
response = "OK"
rescue => e
puts input, e.to_s
response = "Request body contains invalid json."
end
else
code = 403
response = "Key verification failed for POST to #{env["REQUEST_URI"]}."
end
when %r{/delete} # receive from client
if auth(env)
FileUtils.rm env["REQUEST_URI"].sub("/delete/", "")
return [302, { "Location" => "/inbox" }, []]
end
when "/outbox" # receive from client
p "outbox"
if auth(env)
p "OK"
code, response = parse input
else
code = 403
response = "You are not allowed to POST to #{env["REQUEST_URI"]}."
end
when "/follow" # receive from client
if auth(env)
input.split.each do |mention|
actor = actor(mention)
follow = { "@context" => "https://www.w3.org/ns/activitystreams",
"id" => File.join(SOCIAL_URL, "following", SecureRandom.uuid + ".json"),
"type" => "Follow",
"actor" => ACTOR,
"object" => actor }
save follow
puts(send follow, [actor])
code = 200
response = "OK"
end
else
code = 403
response = "You are not allowed to POST to #{env["REQUEST_URI"]}."
end
when "/unfollow" # receive from client
if auth(env)
input.split.each do |mention|
actor = actor(mention)
Dir["following/*.json"].each do |f|
follow = JSON.parse(File.read(f))
puts follow
if follow["object"] == actor
undo = { "@context" => "https://www.w3.org/ns/activitystreams",
"id" => File.join(SOCIAL_URL + "#undo", SecureRandom.uuid),
"type" => "Undo",
"actor" => ACTOR,
"object" => follow }
send undo, [actor]
FileUtils.rm f
end
end
end
end
end
when 'GET'
case env["REQUEST_URI"] # REQUEST_PATH does not contain queries
when "/inbox"
if auth(env)
case env["HTTP_ACCEPT"]
else
type = "text/html"
response = html env["REQUEST_PATH"]
end
code = 200
else
code = 403
response = "You are not allowed to GET #{env["REQUEST_URI"]}."
end
when %r{/[outbox|following|followers|likes|shares]}
response = ordered_collection(env["REQUEST_PATH"]).to_json
code = 200
end
end
[code, { "Content-Type" => type }, [response]]
end
def html path
end
=end
=begin
def html o
html = "<!DOCTYPE html>
<html lang='en'>
<body>
<b>#{mention o["actor"]}</b> <i>#{o["object"]["published"]}</i>
<p>#{o["object"]["content"]}
"
if o["object"]["attachment"]
o["object"]["attachment"].each do |att|
case att["mediaType"]
when /audio/
html<< "\n<br><audio controls=''><source src='#{att["url"]}' type='#{att["mediaType"]}'></audio>"
when /image/
html << "\n<br><a href='#{att["url"]}'><img src='#{att["url"]}'></a>"
when /video/
html<< "\n<br><video controls=''><source src='#{att["url"]}' type='#{att["mediaType"]}'></video>"
else
html<< att + "<br>"
html << "\n<a href='#{att["url"]}'>#{att["url"]}</a>"
end
end
end
end
html << "\n\t</body>\n</html>"
html
end
=end
=begin
def parse input
date = Time.now.strftime("%Y-%m-%dT%H:%M:%S")
# TODO media attachments, hashtags
note = {
"@context" => "https://www.w3.org/ns/activitystreams",
"id" => File.join(SOCIAL_URL, "note", SecureRandom.uuid + ".json"),
"type" => "Note",
"attributedTo" => ACTOR,
"published" => date,
"content" => "",
"to" => ["https://www.w3.org/ns/activitystreams#Public"]
}
create = {
"@context" => "https://www.w3.org/ns/activitystreams",
"id" => File.join(SOCIAL_URL, "create", SecureRandom.uuid + ".json"),
"type" => "Create",
"actor" => ACTOR,
"object" => note,
"published" => date,
"to" => ["https://www.w3.org/ns/activitystreams#Public"]
}
recipients = []
if /^@/.match input
mentions, input = input.split("\n", 2)
mentions.split(/, */).each do |m|
recipients << actor(m.chomp)
end
end
note["content"] = input.lines.select { |l| !l.empty? }.join("<br>")
recipients += Dir[File.join("followers", "*.json")].collect { |f| JSON.parse(File.read(f))["actor"] }
recipients.delete ACTOR
recipients.uniq!
note["to"] += recipients
create["to"] += recipients
save create
save note
FileUtils.ln_s File.join('..', path(create)), "outbox"
responses = send create, recipients
if responses.collect { |r| r.code.to_i }.uniq.max < 400
code = 200
response = "OK"
else
code = 502
response = responses.select { |r| r.code.to_i >= 400 }.collect { |r| r.body }.uniq
end
[code, response]
end
def actor mention
mention = mention.sub(/^@/, '').chomp
user, server = mention.split("@")
get("https://#{server}/.well-known/webfinger?resource=acct:#{mention}",
"application/jrd+json")["links"].select { |l|
l["rel"] == "self"
}[0]["href"]
end
def send object, urls
# https://github.com/mastodon/mastodon/blob/main/app/lib/request.rb
keypair = OpenSSL::PKey::RSA.new(File.read('private.pem'))
responses = []
urls.each do |url|
date = Time.now.utc.httpdate
uri = URI.parse(url)
sha256 = OpenSSL::Digest::SHA256.new
body = object.to_json
digest = "SHA-256=" + sha256.base64digest(body)
signed_string = "(request-target): post #{inbox uri}\nhost: #{uri.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 + '"'
uri = URI.parse(get(url)["inbox"])
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = true
header = {
'Content-Type' => 'application/activity+json',
'Host' => uri.host,
'Date' => date,
'Digest' => digest,
'Signature' => signed_header,
}
request = Net::HTTP::Post.new(uri.request_uri, header)
request.body = body
responses << http.request(request)
end
# puts responses
responses
end
def inbox uri
URI(get(uri)["inbox"]).request_uri
end
def path object
object["id"].sub(SOCIAL_URL, '').sub('/', '')
end
def save object
path = path object
FileUtils.mkdir_p File.dirname(path)
File.open(path, "w+") { |f| f.puts object.to_json }
end
def verify env
# https://github.com/mastodon/mastodon/blob/main/app/controllers/concerns/signature_verification.rb
# TODO verify digest
signature_params = {}
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 = get 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}: #{env["CONTENT_TYPE"]}"
else
"#{signed_params_name}: #{env["HTTP_" + signed_params_name.upcase]}"
end
end.join("\n")
key.verify(OpenSSL::Digest.new('SHA256'), signature, comparison)
# true
end
def auth env
auth = Rack::Auth::Basic::Request.new(env)
usr = File.read(".usr").chomp
pwd = File.read(".pwd").chomp
auth.provided? && auth.basic? && auth.credentials && auth.credentials == [usr, pwd]
true
end
end
=end
|
