Created
December 3, 2012 10:41
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Cross domain streaming with Goliath
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| #!/usr/bin/env ruby | |
| require 'rubygems' | |
| require 'bundler/setup' | |
| require 'goliath' | |
| class RedisPubsub < Goliath::API | |
| use(Rack::Static, :root => Goliath::Application.app_path("public"), :urls => ["/index.html", "/twitter.html", "/favicon.ico", '/stylesheets/', '/javascripts/', '/images/']) | |
| use Goliath::Rack::Params | |
| use Goliath::Rack::Render, 'json' | |
| def response(env) | |
| if env['PATH_INFO'] == "/" | |
| [301, {'Location' => '/index.html'}, nil] | |
| elsif env['PATH_INFO'] == "/tweets" | |
| config['redis_twitter'].on(:message) do |channel, message| | |
| env.stream_send("data:#{message}\n\n") | |
| end | |
| streaming_response(200, {'Content-Type' => 'text/event-stream', 'Access-Control-Allow-Origin' => '*'}) | |
| else | |
| config['redis_news'].on(:message) do |channel, message| | |
| env.stream_send("data:#{message}\n\n") | |
| end | |
| streaming_response(200, {'Content-Type' => 'text/event-stream', 'Access-Control-Allow-Origin' => '*'}) | |
| end | |
| end | |
| end |
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| <!-- http://example.com/twitter.html --> | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script> | |
| </head> | |
| <body> | |
| <h3>Twitter SSE!</h3> | |
| <div id="result"></div> | |
| <script> | |
| var source = new EventSource('http://www.firehose.com/tweets'); | |
| // new connection opened callback | |
| source.addEventListener('open', function(e) { | |
| console.log('twitter connection opened'); | |
| }, false); | |
| // new connection opened callback | |
| source.addEventListener('message', function(e) { | |
| console.log('tweet received'+e.data); | |
| msg = JSON.parse(e.data); | |
| $('#result').append('<br/>Tweet : ').append(msg.msg); | |
| }, false); | |
| // connection closed callback | |
| source.addEventListener('error', function(e) { | |
| if (e.eventPhase == EventSource.CLOSED) { | |
| console.log('twitter connection closed'); | |
| } | |
| }, false); | |
| </script> | |
| </body> | |
| </html> |
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