em-websocket send（）通過2臺服務器從一個客戶端發送到另一個客戶端

Question

我有兩個websocket客戶端，我想在它們之間交換信息。

比方說，我有兩個套接字服務器實例，1st檢索私人信息，過濾它併發送到第二個。

require 'em-websocket' 

EM.run do 
    EM::WebSocket.run(host: '0.0.0.0', port: 19108) do |manager_emulator| 
    # retrieve information. After that I need to send it to another port (9108) 
    end 

    EM::WebSocket.run(host: '0.0.0.0', port: 9108) do |fake_manager| 
    # I need to send filtered information here 
    end 
end 

我試過去做一些事情，但是我得到了一般的黑暗代碼，我不知道如何實現這個功能。

Answer 1

我發現了一種方法，通過em-websocket寶石！你只需要在eventmachine塊之外定義變量。類似的東西

require 'em-websocket' 

message_sender = nil 

EM.run do 
    # message sender 
    EM::WebSocket.run(host: '0.0.0.0', port: 19108) do |ws| 
    ws.onopen { message_sender = ws } 
    ws.onclose { message_sender = nil } 
    end 

    # message receiver 
    EM::WebSocket.run(host: '0.0.0.0', port: 9108) do |ws| 
    ws.onmessage { |msg| message_sender.send(msg) if message_sender } 
    end 
end 

Answer 2

我不知道你會怎麼做，使用EM。

我假設你需要讓fake_manager監聽由manager_emulator觸發的事件。

如果您使用websocket web應用程序框架，這將是相當容易的。例如，在Plezi web-app framework你可以寫這樣的東西：

# try the example from your terminal. 
# use http://www.websocket.org/echo.html in two different browsers to observe: 
# 
# Window 1: http://localhost:3000/manager 
# Window 2: http://localhost:3000/fake 

require 'plezi' 

class Manager_Controller 
    def on_message data 
     FakeManager_Controller.broadcast :_send, "Hi, fake! Please do something with: #{data}\r\n- from Manager." 
     true 
    end 
    def _send message 
     response << message 
    end 
end 
class FakeManager_Controller 
    def on_message data 
     Manager_Controller.broadcast :_send, "Hi, manager! This is yours: #{data}\r\n- from Fake." 
     true 
    end 
    def _send message 
     response << message 
    end 
end 
class HomeController 
    def index 
     "use http://www.websocket.org/echo.html in two different browsers to observe this demo in action:\r\n" + 
     "Window 1: http://localhost:3000/manager\r\nWindow 2: http://localhost:3000/fake\r\n" 
    end 
end 

# # optional Redis URL: automatic broadcasting across processes or machines: 
# ENV['PL_REDIS_URL'] = "redis://username:password@my.host:6379" 

# starts listening with default settings, on port 3000 
listen 

# Setup routes: 
# They are automatically converted to the RESTful route: '/path/(:id)' 
route '/manager', Manager_Controller 
route '/fake', FakeManager_Controller 
route '/', HomeController 

# exit terminal to start server 
exit 

祝你好運！

P.S.

如果您打算繼續使用EM，則可以考慮使用Redis來推送和訂閱兩個端口之間的事件。