通过nodejs和express向客户端发送请求进度

const express = require('express');
const app = express();
const http = require('http').Server(app);
const io = require('socket.io')(http);

app.get('/progress', (req, res) => {
  // 处理请求进度的逻辑
});

io.on('connection', (socket) => {
  console.log('A client connected');
});

app.get('/progress', (req, res) => {
  res.writeHead(200, {'Content-Type': 'text/plain'});

  // 模拟请求进度更新
  for (let i = 0; i <= 100; i++) {
    res.write(`Progress: ${i}%\n`);

    // 实时发送进度信息给客户端
    io.emit('progress', i);

    // 模拟耗时操作
    // 可以根据实际情况进行修改
    // 这里使用setTimeout模拟异步操作
    setTimeout(() => {}, 100);
  }

  res.end();
});

<script src="/socket.io/socket.io.js"></script>

const socket = io();

socket.on('progress', (progress) => {
  // 更新页面上的进度信息
  console.log(`Progress: ${progress}%`);
});