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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}\""
p inbox
# 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
)
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 '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.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|
# Dir[File.join('*box', '**', '*.json')].find do |f|
JSON.load_file(f)['id'] == id
end
end
end
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