如何在Node.js中将文件从服务器端发送到客户端

const fs = require('fs');
const path = require('path');
const http = require('http');

const server = http.createServer((req, res) => {
  // 处理请求逻辑
});

const filePath = path.join(__dirname, 'path/to/file');  // 文件路径
const stat = fs.statSync(filePath);  // 获取文件信息

res.writeHead(200, {
  'Content-Type': 'application/octet-stream',  // 设置文件下载类型
  'Content-Length': stat.size,  // 设置文件大小
  'Content-Disposition': 'attachment; filename=file.txt'  // 设置下载文件名
});

const readStream = fs.createReadStream(filePath);  // 创建可读流
readStream.pipe(res);  // 将文件流导向HTTP响应

const fs = require('fs');
const path = require('path');
const http = require('http');

const server = http.createServer((req, res) => {
  const filePath = path.join(__dirname, 'path/to/file');
  const stat = fs.statSync(filePath);

  res.writeHead(200, {
    'Content-Type': 'application/octet-stream',
    'Content-Length': stat.size,
    'Content-Disposition': 'attachment; filename=file.txt'
  });

  const readStream = fs.createReadStream(filePath);
  readStream.pipe(res);
});

server.listen(3000, () => {
  console.log('Server started on port 3000');
});