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How to implement a real-time online complaint system using WebSocket and JavaScript

WBOYOriginal: 2023-12-17 09:23:30551browse

How to use WebSocket and JavaScript to implement a real-time online complaint system

Abstract: This article describes how to use WebSocket and JavaScript to build a real-time online complaint system. Through the two-way communication feature of WebSocket, real-time communication between users and administrators can be achieved, and specific code examples are provided.

Introduction
In today's social media and Internet era, people expect to be able to communicate and provide feedback directly with service providers through the network in real time. Therefore, it is very important to build a real-time online complaint system that can meet the needs of users and improve service quality.
Preparation
First, we need a basic web page structure, which includes a text box for displaying complaint content, a button for sending complaints, and an area for displaying complaint responses. The sample code is as follows:

<!DOCTYPE html>
<html>
<head>
<title>实时在线投诉系统</title>
</head>
<body>
<h1>实时在线投诉系统</h1>
<textarea id="complaints" rows="5" cols="50"></textarea><br>
<button onclick="sendComplaint()">发送投诉</button><br>
<div id="replies"></div>
</body>
</html>

Establishing a WebSocket connection
The easiest way to use WebSocket to achieve two-way communication is to use the JavaScript WebSocket API. In JavaScript, we can use WebSocket objects to establish connections and listen for messages to arrive. The sample code is as follows:

var socket = new WebSocket('wss://your-websocket-server.com');

socket.onopen = function() {
  console.log('WebSocket连接已建立');
};

socket.onmessage = function(event) {
  var reply = event.data;
  document.getElementById('replies').innerHTML += '<p>' + reply + '</p>';
};

socket.onclose = function() {
  console.log('WebSocket连接已关闭');
};

function sendComplaint() {
  var complaints = document.getElementById('complaints').value;
  socket.send(complaints);
}

In this code, we first create a WebSocket object and specify the server address to connect to. We then handle the opening of connections, the arrival of messages, and the closing of connections by defining some event handlers. Finally, we define a function to send complaints, which sends the complaint content to the server.

Server-side implementation
On the server side, we need to establish a WebSocket server to receive and process messages from the client and send replies to the client. The specific implementation of this part depends on the server technology you use. The following is a simple Node.js server code example:

const WebSocket = require('ws');
const wss = new WebSocket.Server({ port: 8080 });

wss.on('connection', function(ws) {
  ws.on('message', function(message) {
    console.log('接收到投诉：' + message);
  
    // 处理投诉逻辑，并返回回复
    var reply = '感谢您的投诉，我们会尽快处理。';
  
    ws.send(reply);
  });
});

In this example, we first create a WebSocket server and specify the listening port. When a new connection is established, the server will execute the callback function. In the callback function, we receive the message from the client and handle the complaint logic. Finally, we send the reply to the client through the send method of the WebSocket object.

Sample Demonstration
Deploy the web page and server code to your local or remote server, and ensure that your server can be accessed normally. Then, open the web page and test the complaint system. Enter the complaint content and click the send button. You will be able to see the administrator's reply in the reply area.
Conclusion
By using WebSocket and JavaScript, we successfully implemented a real-time online complaint system. This system can meet the needs of users and enable real-time communication between users and administrators. By studying the code examples provided in this article, you can further improve the complaint system and apply it to other real-time communication scenarios.

Reference materials:

[WebSocket API](https://developer.mozilla.org/zh-CN/docs/Web/API/WebSocket)
[Node.js WebSocket](https://github.com/websockets/ws)

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