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igrigorik/Gemfile

Created August 26, 2011 06:33
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HTML5 SSE / EventSource demo with Goliath
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Gemfile
source :gemcutter
gem 'goliath', :git => 'git://github.com/postrank-labs/goliath.git'
gem 'em-synchrony', :git => 'git://github.com/igrigorik/em-synchrony.git'
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index.html
<!DOCTYPE html>
<html>
<body>
<h3>Hello SSE!</h3>
<script>
var source = new EventSource('/events');
// new connection opened callback
source.addEventListener('open', function(e) {
console.log('connection opened');
}, false);
// subscribe to unnamed messages
source.onmessage = function(e) {
console.log(e);
document.body.innerHTML += e.data + '<br />';
};
// listen for signup events
source.addEventListener('signup', function(e) {
console.log(e);
document.body.innerHTML += e.data + '<br />';
}, false);
// connection closed callback
source.addEventListener('error', function(e) {
if (e.eventPhase == EventSource.CLOSED) {
console.log('connection closed');
}
}, false);
</script>
</body>
</html>
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Procfile
web: bundle exec ruby sse.rb -sv -e prod -p $PORT
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sse.rb
require 'goliath'
class SSE < Goliath::API
use Rack::Static, :urls => ["/index.html"], :root => Goliath::Application.app_path("public")
def response(env)
EM.add_periodic_timer(1) { env.stream_send("data:hello ##{rand(100)}\n\n") }
EM.add_periodic_timer(3) do
env.stream_send(["event:signup", "data:signup event ##{rand(100)}\n\n"].join("\n"))
end
streaming_response(200, {'Content-Type' => 'text/event-stream'})
end
end
@abuiles
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abuiles commented Aug 30, 2011

@igrigorik should index.html be under public/ ? I wanted to run the example locally, had to add public and then move index there.

@igrigorik
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Author

Yep, just create public directory and it should do the trick

@danielsz
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Looks like something went wrong:

sse.rb:17:in class:SSE': undefined methodget' for SSE:Class (NoMethodError)
from sse.rb:14:in `'

If you know the fix, I'll be very much obliged. Thank you.

@TheKidCoder
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@danielsz With the release of Goliath 1.0, the router has been extracted to its own gem: postrank-labs/goliath#143

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