WebSocket协议与TCP协议的对比与选择

const socket = new WebSocket('ws://localhost:8080');

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

socket.onmessage = function(event) {
  console.log('接收到服务器发送的消息：', event.data);
};

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

// 发送数据
socket.send('Hello Server!');

const http = require('http');
const WebSocketServer = require('websocket').server;

const server = http.createServer(function(request, response) {
  response.writeHead(200, {'Content-Type': 'text/plain'});
  response.end('Hello World
');
});

server.listen(8080, function() {
  console.log('服务器已启动');
});

const wsServer = new WebSocketServer({
  httpserver: server,
  autoAcceptConnections: false
});

wsServer.on('request', function(request) {
  const connection = request.accept(null, request.origin);
  
  connection.on('message', function(message) {
    console.log('接收到客户端发送的消息：', message.utf8Data);
    // 回复消息
    connection.sendUTF('Hello Client!');
  });
  
  connection.on('close', function(reasonCode, description) {
    console.log('连接已关闭', reasonCode, description);
  });
});

using System;
using System.net.Sockets;
using System.Text;

class TcpClientExample
{
    public static void Main()
    {
        TcpClient client = new TcpClient("localhost", 8080);
        NetworkStream stream = client.GetStream();
        
        byte[] data = Encoding.ASCII.GetBytes("Hello Server!");
        stream.Write(data, 0, data.Length);
        
        data = new byte[256];
        int bytes = stream.Read(data, 0, data.Length);
        string responseData = Encoding.ASCII.GetString(data, 0, bytes);
        Console.WriteLine("接收到服务器的响应：{0}", responseData);
        
        stream.Close();
        client.Close();
    }
}

import java.io.*;
import java.net.*;

class TcpServerExample
{
    public static void main(String args[]) throws Exception
    {
        ServerSocket server = new ServerSocket(8080);
        System.out.println("服务器已启动");
        
        Socket socket = server.accept();
        System.out.println("接收到客户端连接");
        
        BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
        
        String input = in.readLine();
        System.out.println("接收到客户端的消息：" + input);
        
        out.println("Hello Client!");
        
        in.close();
        out.close();
        socket.close();
        server.close();
    }
}