Rails 3.1 Sinatra streaming question...

metaserver.rb

require 'sinatra'
require 'thin'

class Metaserver < Sinatra::Base
  set server: 'thin'
  set connections: []

  get '/stream', provides: 'text/event-stream' do
    stream :keep_open do |out|
      settings.connections << out
      out.callback { settings.connections.delete(out) }
      out.errback { settings.connections.delete out }
    end
  end

  post '/stream' do
    puts "Relay to #{settings.connections.count} streams"
    settings.connections.each { |out| out << "data: #{params[:msg]}\n\n" }
    204 # response without entity body
  end
end

routes.rb

require 'metaserver'

Metaverse::Application.routes.draw do
  match '/stream', :to => Metaserver
  resource :login, :only => :show
  resource :explore, :only => :show, :controller => 'explore'

  root :to => 'login#show'
end

Is this supposed to work on Rails?

I get a similar example to work when only running the Sinatra app by itself. When I run it mounted inside a Rails app, it fails in creating a persistent connection and tries to reconnect continuously.

Yea, I was pasting this as a question. It turns out you need to mount the Sinatra app first in a rackup file, and then load rails after that.

I tried mounting the Sinatra app as a Rack middleware in my Rails app and that worked. Cheers.

@baronlinden How did you do that? I am mounting it from application.rb , did you mounted it directly at config.ru and worked?

You need to add this to your application.rb

config.preload_frameworks = true
config.allow_concurrency = true