Cookin' with Cool.io

Transcript

1. TWEETS Miami Ruby Brigade February 21, 2010 EVENT-DRIVEN Monday, February 21, 2011
2. http://coolio.github.com Cool event driven programming for Ruby Monday, February 21, 2011
3. http://github.com/bkerley/cookin Event-driven Twitter Stream Monday, February 21, 2011
4. Monday, February 21, 2011
5. Event-driven Programming EventMachine Erlang OTP node.js jquery.js Cocoa Rails Monday, February 21, 2011
6. Event-driven Programming Monday, February 21, 2011
7. Event-driven Programming •Be reactive instead of proactive Monday, February 21, 2011
8. Event-driven Programming •Be reactive instead of proactive •Don’t manage sockets and connections Monday, February 21, 2011
9. Event-driven Programming •Be reactive instead of proactive •Don’t manage sockets and connections •Framework for network services Monday, February 21, 2011
10. Synchronous s = TCPSocket.open('localhost', '80') while line = s.gets puts line.chop end s.close Monday, February 21, 2011
11. Synchronous No error handling Tightly coupled Monday, February 21, 2011
12. Event-Driven cool.io.connect 'localhost', '80' do on_read do |data| puts data end end cool.io.run Monday, February 21, 2011
13. Event-Driven Error handling done for you Easy to de-couple Abstracted with a nice DSL Monday, February 21, 2011
14. Event-Driven Most web frameworks are event-driven get '/' do 'Hello World' end Monday, February 21, 2011
15. Cool.io Formerly rev Uses libev Tony Arcieri made it Monday, February 21, 2011
16. Cool.io Monday, February 21, 2011
17. Cool.io Monday, February 21, 2011
18. Cool.io Clients and servers are Watcher objects Monday, February 21, 2011
19. Cool.io Clients and servers are Watcher objects Watcher objects are attached to a Loop Monday, February 21, 2011
20. Cool.io Clients and servers are Watcher objects Watcher objects are attached to a Loop The Loop checks for events Monday, February 21, 2011
21. Cool.io Clients and servers are Watcher objects Watcher objects are attached to a Loop The Loop checks for events Events turned into method calls on Watchers Monday, February 21, 2011
22. Let’s Stream Something Monday, February 21, 2011
23. Let’s Stream Something The Twitter Streaming API allows high-throughput near-realtime access to various subsets of public and protected Twitter data. http://dev.twitter.com/pages/streaming_api Monday, February 21, 2011
24. Monday, February 21, 2011
25. > curl http://stream.twitter.com/1/statuses/sample.json -u$TWITTER_CREDS Monday, February 21, 2011
26. > curl http://stream.twitter.com/1/statuses/sample.json -u$TWITTER_CREDS {"id_str":"39478605398540289","user": {"id_str":"49713582","profile_background_tile":true,"followers_count": 115,"profile_link_color":"0084B4","follow_request_sent":null,"created_at":"Mon Jun 22 18:18:50 +0000 2009","profile_sidebar_border_color":"C0DEED","location":"","profile_use_background_image":tru e,"description":"one day your life will flash before your eyes, make sure its worth watching!! ","is_translator":false,"show_all_inline_media":false,"geo_enabled":false,"notifications":null ,"favourites_count":0,"profile_background_color":"C0DEED","listed_count": 1,"profile_background_image_url":"http:\/\/a3.twimg.com\/profile_background_images\/ 201506934\/music.jpg","protected":false,"url":null,"profile_image_url":"http:\/\/a2.twimg.com \/profile_images\/1205125052\/ 168396_486467418449_733593449_6116244_8314553_n_normal.jpg","name":"Amy Jones","contributors_enabled":false,"lang":"en","statuses_count": 3936,"verified":false,"time_zone":null,"profile_text_color":"333333","id": 49713582,"following":null,"utc_offset":null,"friends_count": 95,"profile_sidebar_fill_color":"DDEEF6","screen_name":"amyyjonesss"},"in_reply_to_status_id": null,"truncated":false,"text":"eaten way too much sugar and am not tired at all now :|","favorited":false,"created_at":"Mon Feb 21 00:16:47 +0000 2011","source":"\u003Ca href=\"http:\/\/blackberry.com\/twitter\" rel=\"nofollow\"\u003ETwitter for BlackBerry\u00ae \u003C\/a \u003E","geo":null,"in_reply_to_screen_name":null,"in_reply_to_status_id_str":null,"entities": {"user_mentions":[],"hashtags":[],"urls": []},"contributors":null,"place":null,"retweeted":false,"in_reply_to_user_id_str":null,"retweet _count":0,"in_reply_to_user_id":null,"id":39478605398540289,"coordinates":null} Monday, February 21, 2011
27. Twitter Streaming API Monday, February 21, 2011
28. Twitter Streaming API Random selection Monday, February 21, 2011
29. Twitter Streaming API Random selection Statuses, deletions, location scrubs Monday, February 21, 2011
30. Twitter Streaming API Random selection Statuses, deletions, location scrubs JSON-encoded Monday, February 21, 2011
31. Twitter Streaming API Random selection Statuses, deletions, location scrubs JSON-encoded Never ends Monday, February 21, 2011
32. Twitter Streaming API Monday, February 21, 2011
33. Twitter Streaming API 1.Connect to stream.twitter.com Monday, February 21, 2011
34. Twitter Streaming API 1.Connect to stream.twitter.com 2.Ask for sample.json Monday, February 21, 2011
35. Twitter Streaming API 1.Connect to stream.twitter.com 2.Ask for sample.json 3.Throw data into JSON parser as we receive it Monday, February 21, 2011
36. Twitter Streaming API 1.Connect to stream.twitter.com 2.Ask for sample.json 3.Throw data into JSON parser as we receive it 4.When we have a complete JSON hash, display it Monday, February 21, 2011
37. Start the Client loop = Cool.io::Loop.default client = TwitterClient.connect.attach(loop) client.request loop.run Monday, February 21, 2011
38. Connect and Attach class TwitterClient < Cool.io::HttpClient def self.connect super 'stream.twitter.com', 80 end def request super 'GET', '/1/statuses/sample.json', :head=>{ 'Authorization'=>"Basic #{creds}", 'Accept'=>'*/*', 'Connection'=>'keep-alive'} end Monday, February 21, 2011
39. Response Handling def on_response_header(header) super @yajl = Yajl::Parser.new(:symbolize_keys=>true) @yajl.on_parse_complete = method(:on_element) end def on_body_data(data) @yajl << data end Monday, February 21, 2011
40. Tweet Handling def on_element(element) return on_delete(element[:delete]) if element[:delete] return on_tweet(element) rescue NoMethodError => e $stderr.puts "UNEXPECTED #{element.inspect}" end def on_tweet(tweet) $stdout.puts "#{tweet[:user][:screen_name]}: #{tweet[:text]}" end Monday, February 21, 2011
41. Monday, February 21, 2011
42. > bundle exec ./bin/cookin Monday, February 21, 2011
43. > bundle exec ./bin/cookin AmmmyClemmensen: STAY HOME FROM SCHOOL, REPLY TO ANDY, WAKE UP LATER & SEE I HAVE A REPLY FROM HIM, AND THAT MY STACK APP PRIZE CAME. FUCK YEAH BEST DAY. :D ff6_celes_bot: @misorugy ͓͸Α͏ɺΈͭ͸ɻࠓ೔΋1 ೔͕Μ͹Γ·͠ΐ͏Ͷɻ Redacting tweet 39485416960831488 from 25491312 mapaquet: @moalla Mais oui,c'est vrai, ce sont les procureurs & avocats qu'on veut baillonner. :) Monday, February 21, 2011
44. Monday, February 21, 2011
45. WARNING The next few slides are about something that doesn’t exist yet. Don’t try and use it. I will laugh at you. Monday, February 21, 2011
46. DSL for a Twitter Bot? Cookin.with('miamirb') do track '#miamirb' do |t| # tweets with #miamirb t.reply 'Thanks for mentioning #miamirb!' end track 'miami ruby', 'miami rails' do |t| # tweets with miami and ruby or rails t.reply 'Have you asked anybody in the Miami Ruby Brigade?' end follow 'miamirb' do |t| # tweets with @miamirb t.reply "I'll pass that on!" dm 'BonzoESC', "#{t[:user][:screen_name]} said something #{t.permalink}" end end Monday, February 21, 2011
47. DSL for a Twitter Bot? Credential Storage (OAuth) Username/ID conversion for follow Monday, February 21, 2011
48. DSL for a Twitter Bot? Cookin.with('miamirb') do track '#miamirb' do |t| t.reply 'Thanks' end end 1. Check authentication store for ‘miamirb’ 2. If authentication failed, OAuthenticate 3. Create a Cookin::FilterClient instance 4. Add ‘#miamirb’ to the track list of the instance 5. Add processing rule for tweets matching ‘#miamirb’ to the instance 6. Connect the instance to the loop and start the loop Monday, February 21, 2011