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POSinatra streaming with Puma?
 

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    <p>I'm trying to leverage Server-Sent Events in my application. I am using Sinatra and the <a href="https://github.com/radiospiel/sinatra-sse"><code>sinatra-sse</code></a> gem. This gem wraps the Sinatra <code>stream :keep_alive</code> call.</p> <p>When running my application on Thin, I have absolutely no problems, and my event stream works as expected. However, when I switched my application to run with Puma everything works, except my <code>sse_stream</code> does absolutely nothing! It just returns a blank page.</p> <p>My stream is set up like so</p> <pre><code>get "/logstream/:server" do if rbcserver = MyApp.servers[params[:server]] sse_stream do |stream| rbcserver.add_web_logger(stream) stream.callback { rbcserver.remove_web_logger(stream) } end else error 404 end end </code></pre> <p>I'm starting Thin like so:</p> <pre><code>@@puma_instance = Puma::Server.new MyApp::WebUI @@puma_instance.add_tcp_listener ip, port @@puma_instance.run </code></pre> <p>Any idea what's going on? Any help would be appreciated.</p> <p>EDIT: some more info This is what cURL gives when running on Puma</p> <pre><code>$ curl -L -b cookies.txt -c cookies.txt -i http://localhost:9001/logstream/myserver HTTP/1.1 200 OK Content-Type: text/event-stream;charset=utf-8 X-Content-Type-Options: nosniff Transfer-Encoding: chunked $ </code></pre> <p>Whereas this is what happens on Thin</p> <pre><code>$ curl -L -b cookies.txt -c cookies.txt -i http://localhost:9001/logstream/myserver HTTP/1.1 200 OK Content-Type: text/event-stream;charset=utf-8 X-Content-Type-Options: nosniff Connection: close Server: thin 1.5.1 codename Straight Razor event: &lt;event name&gt; data: &lt;my data&gt; event: &lt;event name&gt; data: &lt;my data&gt; &lt;continues as more data comes in&gt; </code></pre> <p>EDIT: I should add that my application uses EventMachine at its core, so <code>sinatra_sse</code>'s coupling to EM is most likely not an issue.</p>
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