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
|
require "json"
require "net/http"
require "simple_oauth"
class ServiceError < StandardError; end
class Service
class << self
private :new
def setup
aa_consumer_key = ENV["TWITTER_EVENT_STREAM_CONSUMER_KEY"]
aa_consumer_secret = ENV["TWITTER_EVENT_STREAM_CONSUMER_SECRET"]
@users = {}
ENV.each { |k, v|
next unless k.start_with?("TWITTER_EVENT_STREAM_USER_")
obj = JSON.parse(v, symbolize_names: true)
@users[obj.fetch(:user_id)] = new(
consumer_key: aa_consumer_key,
consumer_secret: aa_consumer_secret,
**obj,
)
# TODO: Add to the webhook if needed
}
end
def oauth_echo(asp, vca)
if asp != "https://api.twitter.com/1.1/account/verify_credentials.json"
raise ServiceError, "invalid OAuth Echo parameters"
end
uri = URI.parse(asp)
Net::HTTP.start(uri.host, uri.port, use_ssl: true) { |http|
res = http.get(uri.path, { "Authorization" => vca })
raise ServiceError, "OAuth Echo failed" if res.code != "200"
content = JSON.parse(res.body)
get(content["id"])
}
end
def feed_webhook(json)
hash = JSON.parse(json)
if user_id = hash["for_user_id"]
service = get(user_id)
service.feed_webhook(hash)
else
warn "FIXME\n#{hash}"
end
end
private
def get(user_id)
@users[user_id] or
raise ServiceError, "unauthenticated user: #{user_id}"
end
end
attr_reader :user_id
def initialize(user_id:,
requests_per_window:,
consumer_key:,
consumer_secret:,
token:,
token_secret:,
rest_consumer_key: consumer_key,
rest_consumer_secret: consumer_secret,
rest_token: token,
rest_token_secret: token_secret)
@user_id = user_id
@requests_per_window = Integer(requests_per_window)
@aa_oauth = {
consumer_key: consumer_key,
consumer_secret: consumer_secret,
token: token,
token_secret: token_secret,
}
@rest_oauth = {
consumer_key: rest_consumer_key,
consumer_secret: rest_consumer_secret,
token: rest_token,
token_secret: rest_token_secret,
}
@listeners = {}
@backfill = []
start_polling
end
def subscribe(count, &block)
@listeners[block] = block
emit_backfill(count)
block
end
def unsubscribe(tag)
@listeners.delete(tag)
end
def feed_webhook(hash)
hash.each do |key, value|
next if key == "for_user_id"
emit(key, value)
end
end
def twitter_get(path, params)
path += "?" + params.map { |k, v| "#{k}=#{v}" }.join("&") if !params.empty?
uri = URI.parse("https://api.twitter.com#{path}")
auth = SimpleOAuth::Header.new(:get, uri.to_s, {}, @rest_oauth).to_s
Net::HTTP.start(uri.host, uri.port, use_ssl: true) { |http|
res = http.get(path, { "Authorization" => auth })
if res.code != "200"
# pp res.each_header.to_h
raise ServiceError, "API request failed: path=#{path} body=#{res.body}"
end
JSON.parse(res.body)
}
end
private
def emit(event, object)
# TODO: backfill
@backfill.shift if @backfill.size == 100
@backfill << [event, object]
@listeners.each { |_, block| block.call(event, object) }
end
def emit_system(message)
emit("twitter_event_stream_message", message)
end
def emit_backfill(count)
@backfill.last(count).each { |event, object| emit(event, object) }
end
def start_polling
@polling_thread = Thread.start {
request_interval = 15.0 * 60 / @requests_per_window
begin
last_max = nil
while true
t = Time.now
opts = { "count" => 200, "since_id" => last_max ? last_max - 1 : 1 }
ret = twitter_get("/1.1/statuses/home_timeline.json", opts)
unless ret.empty?
if last_max
if last_max != ret.last["id"]
emit_system("possible stalled tweets " \
"#{last_max}+1...#{ret.last["id"]}")
else
ret.pop
end
end
unless ret.empty?
emit("twitter_event_stream_home_timeline", ret)
last_max = ret.first["id"]
end
end
sleep -(Time.now - t) % request_interval
end
rescue => e
warn "polling_thread (#{user_id}) uncaught exception: " \
"#{e.class} (#{e.message})"
warn e.backtrace
warn "polling_thread (#{user_id}) restarting in #{request_interval}s"
sleep request_interval
retry
end
}
end
end
|