我可以在Heroku上为EventMachine启动单独的端口吗?

时间:2014-11-19 07:04:41

标签: ruby-on-rails-3 heroku websocket eventmachine

我在rails应用程序上有一个ruby我在其中为EventMachine定义了一个初始化程序,它将在指定的端口上启动EventMachine套接字,这是初始化程序websocket.rb的代码:

Thread.new {
    require 'eventmachine'
    require 'em-websocket'
    EventMachine.run {
        host = "0.0.0.0"
        port = 2000
        $CHANNEL = EventMachine::Channel.new
        EventMachine::WebSocket.start(:host => host, :port => port, :debug => true) do |ws|
         ws.onopen {
            @sid = $CHANNEL.subscribe { |msg| ws.send msg }
#           $CHANNEL.push "#{@sid} connected!"
         }  
         ws.onmessage { |msg|
              $CHANNEL.push "#{msg}"
         }
         ws.onclose {
              puts "Socket closed."
#             this code is commented as we don't want to unsubscribe any socket from channel
#             $CHANNEL.unsubscribe(@sid)
         } 
      end
      puts "Socket server started..."
    }
} unless EventMachine.reactor_running? && EventMachine.reactor_thread.alive?

我在html文件中监听这个套接字,我在客户端使用html WebSocket。

以下是我的客户端websocket侦听器的代码:

if("WebSocket" in window){
         var socketURL = 'ws://' + window.location.hostname + ':2000/';
          console.log(socketURL);
          ws = new WebSocket(socketURL);
        ws.onmessage = function(response) {
             console.log('Data received:'+response.data); 
        }
        ws.onclose = function() {
          console.info('Connection closed');
        };
        ws.onopen = function() {
          console.info('Connection opened');
        };  
      }else{
          console.log("You browser doesn't support websockets.")
      }

我想将我的这个rails应用程序部署到Heroku,那么Heroku的EventMachine有什么问题吗?

是否可以在Heroku上为TCPServer启动端口?

如果我在Heroku上部署此应用程序可能会出现什么问题?

任何建议或帮助将不胜感激。

提前致谢。

1 个答案:

答案 0 :(得分:0)

不,无法在heroku上打开端口来运行事件计算机Web套接字,如问题中所述。路由层只会将端口80和443代理到您的应用程序,该应用程序将在您的应用启动时监听heroku提供的某个任意端口。

客户端将无法连接到您指定的端口上的Web套接字。有关使用带有heroku的Web套接字的示例,请参阅此处:https://devcenter.heroku.com/articles/websockets