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require "em-twitter"
require "yajl"
require "msgpack"
require "./settings"
require "./logger"
class Worker
class DBProxyClient < EM::Connection
def send_object(data)
send_data(data.to_msgpack)
end
def initialize
@clients = {}
@pac = MessagePack::Unpacker.new
end
def format_text(status)
chars = status[:text].to_s.split(//)
entities = status[:entities].values.flatten.sort_by{|entity| entity[:indices].first}
result = []
last_index = entities.inject(0) do |last_index, entity|
result << chars[last_index...entity[:indices].first]
result << if entity[:url]
"<url:#{CGI.escape(entity[:expanded_url])}:#{CGI.escape(entity[:display_url])}>"
elsif entity[:text]
"<hashtag:#{CGI.escape(entity[:text])}>"
elsif entity[:screen_name]
"<mention:#{CGI.escape(entity[:screen_name])}>"
elsif entity[:cashtag]
"<cashtag:#{CGI.escape(entity[:cashtag])}>"
end
entity[:indices].last
end
result << chars[last_index..-1]
result.flatten.join
end
def format_source(status)
if status[:source].index("<a")
url = status[:source].scan(/href="(.+?)"/).flatten.first
name = status[:source].scan(/>(.+?)</).flatten.first
"<url:#{CGI.escape(url)}:#{CGI.escape(name)}>"
else
status[:source]
end
end
def receive_account(msg)
user_id = msg["user_id"]
account_id = msg["id"]
if @clients[account_id]
@clients[account_id].connection.stop
@clients.delete(account_id)
end
@clients[account_id] = client = EM::Twitter::Client.new({
:host => "userstream.twitter.com",
:path => "/1.1/user.json",
:oauth => {
:consumer_key => Settings.consumer[msg["consumer_version"].to_i].key,
:consumer_secret => Settings.consumer[msg["consumer_version"].to_i].secret,
:token => msg["oauth_token"],
:token_secret => msg["oauth_token_secret"]},
:method => "GET"})
send_user = -> user do
out = {:type => "user",
:id => user[:id],
:screen_name => user[:screen_name],
:name => user[:name],
:profile_image_url => user[:profile_image_url_https],
:protected => user[:protected]}
send_object(out)
$logger.debug("User(##{account_id}/#{user_id}): #{user[:id]} = #{user[:screen_name]}")
end
send_tweet = -> status do
send_user.call(status[:user])
out = {:type => "tweet",
:id => status[:id],
:text => format_text(status),
:source => format_source(status),
:tweeted_at => status[:created_at],
:user_id => status[:user][:id]}
send_object(out)
$logger.debug("Tweet(##{account_id}/#{user_id}): #{status[:id]}")
end
send_favorite = -> source, target_object do
send_tweet.call(target_object)
send_user.call(source)
out = {:type => "favorite",
:tweet_id => target_object[:id],
:user_id => source[:id]}
send_object(out)
$logger.debug("Favorite(##{account_id}/#{user_id}): #{source[:id]} => #{target_object[:id]}")
end
send_unfavorite = -> source, target_object do
out = {:type => "delete",
:tweet_id => target_object[:id],
:user_id => source[:id]}
send_object(out)
$logger.debug("Unfavorite(##{account_id}/#{user_id}): #{source[:id]} => #{target_object[:id]}")
end
send_retweet = -> status do
send_tweet.call(status[:retweeted_status])
send_user.call(status[:user])
out = {:type => "retweet",
:id => status[:id],
:tweet_id => status[:retweeted_status][:id],
:user_id => status[:user][:id]}
send_object(out)
$logger.debug("Retweet(##{account_id}/#{user_id}): #{status[:user][:id]} => #{status[:retweeted_status][:id]}")
end
send_delete = -> deleted_status_id, deleted_user_id do
out = {:type => "delete",
:id => deleted_status_id,
:user_id => deleted_user_id}
send_object(out)
$logger.debug("Delete(##{account_id}/#{user_id}): #{deleted_user_id} => #{deleted_status_id}")
end
client.on_error do |message|
$logger.warn("Unknown Error(##{account_id}/#{user_id}): #{message}")
end
client.on_unauthorized do
# revoked?
$logger.warn("Unauthorized(##{account_id}/#{user_id})")
out = {:type => "unauthorized", :user_id => user_id, :id => account_id}
send_object(out)
client.connection.stop
@clients.delete(account_id)
end
client.on_enhance_your_calm do
# limit?
$logger.warn("Enhance your calm(##{account_id}/#{user_id})")
end
client.on_no_data_received do
# (?)
$logger.warn("No data received(##{account_id}/#{user_id})")
client.close_connection
end
client.each do |chunk|
begin
hash = Yajl::Parser.parse(chunk, :symbolize_keys => true)
rescue Yajl::ParseError
$logger.warn("Unexpected chunk(##{account_id}/#{user_id}): #{chunk}")
next
end
if hash[:warning]
$logger.info("Stall warning(##{account_id}/#{user_id}): #{hash[:warning]}")
elsif hash[:delete] && hash[:delete][:status]
deleted_status_id = hash[:delete][:status][:id]
deleted_user_id = hash[:delete][:status][:user_id]
send_delete.call(deleted_status_id, deleted_user_id)
elsif hash[:limit]
$logger.warn("UserStreams Limit Event(##{account_id}/#{user_id}): #{hash[:limit][:track]}")
elsif hash[:event]
case hash[:event]
when "favorite"
source = hash[:source]
target_object = hash[:target_object]
if !target_object[:user][:protected] ||
target_object[:user][:id] == user_id
send_favorite.call(source, target_object)
end
when "unfavorite"
send_unfavorite.call(hash[:source], hash[:target_object])
end
elsif hash[:user]
# tweet
if hash[:retweeted_status]
if hash[:retweeted_status][:user][:id] == user_id ||
hash[:user][:id] == user_id
send_retweet.call(hash)
end
elsif hash[:user][:id] == user_id
send_tweet.call(hash)
end
elsif hash[:friends]
# monyo
else
$logger.debug("??(##{account_id}/#{user_id})")
end
end
client.on_reconnect do |timeout, retries|
$logger.warn("Reconnected(##{account_id}/#{user_id}): #{retries}")
end
client.on_max_reconnects do |timeout, retries|
$logger.warn("Max reconnects(##{account_id}/#{user_id}): #{retries}")
client.connection.stop
@clients.delete(account_id)
end
client.connect
$logger.info("Connected(##{account_id}/#{user_id})")
end
def post_init
out = {:type => "init",
:secret_key => Settings.secret_key,
:worker_number => Settings.worker_number}
send_object(out)
end
def unbind
$logger.info("Connection closed")
EM.add_timer(10) do
reconnect(Settings.db_proxy_host, Settings.db_proxy_port)
post_init
end
end
def receive_data(data)
@pac.feed_each(data) do |msg|
unless msg.is_a?(Hash) && msg["type"]
$logger.warn("Unknown data: #{msg}")
return
end
case msg["type"]
when "ok"
$logger.info("ok: #{msg["message"]}")
when "error"
$logger.info("error: #{msg["message"]}")
when "fatal"
$logger.info("fatal: #{msg["message"]}")
when "bye"
$logger.info("bye: #{msg["message"]}")
when "account"
begin
receive_account(msg)
rescue
$logger.error($!)
$logger.error($@)
end
else
$logger.info("Unknown message type: #{msg}")
end
end
end
def stop_all
@clients.map{|k, v| v.connection.stop}
send_object({:type => "quit", :reason => "stop_all"})
end
end
def initialize
$logger = Aclog::Logger.new(:info)
end
def start
$logger.info("Worker ##{Settings.worker_number} started")
EM.run do
connection = EM.connect(Settings.db_proxy_host, Settings.db_proxy_port, DBProxyClient)
stop = Proc.new do
connection.stop_all
EM.stop
end
Signal.trap(:INT, &stop)
Signal.trap(:TERM, &stop)
end
end
end
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