Rails中怎么使用WebSocket进行实时通信

在Rails中使用WebSocket进行实时通信需要先安装并配置Action Cable。Action Cable是Rails中提供的用于处理WebSocket连接的框架。

首先安装Action Cable:

rails generate channel Chat 

然后在config/routes.rb中配置路由:

mount ActionCable.server => '/cable' 

接着在app/channels/chat_channel.rb中编写WebSocket处理逻辑:

class ChatChannel < ApplicationCable::Channel   def subscribed     stream_from "chat_channel"   end    def receive(data)     ActionCable.server.broadcast("chat_channel", data)   end end 

在前端使用JavaScript连接WebSocket并进行实时通信:

App.chat = App.cable.subscriptions.create("ChatChannel", {   connected: function() {     console.log("Connected to chat channel");   },   disconnected: function() {     console.log("Disconnected from chat channel");   },   received: function(data) {     console.log("Received message: ", data);   },   send: function(message) {     this.perform('receive', { message: message });   } });  App.chat.send("Hello, world!"); 

最后在视图中使用Action Cable的辅助方法进行连接:

<%= action_cable_meta_tag %> 

通过以上步骤，就可以在Rails中使用WebSocket进行实时通信了。