node.js请求get重定向链

const http = require('http');

function followRedirects(url, maxRedirects = 5) {
  return new Promise((resolve, reject) => {
    let redirects = 0;

    function request(url) {
      http.get(url, (res) => {
        if (res.statusCode >= 300 && res.statusCode < 400 && res.headers.location) {
          if (redirects >= maxRedirects) {
            reject(new Error('Too many redirects'));
          } else {
            redirects++;
            request(res.headers.location);
          }
        } else {
          resolve(res);
        }
      }).on('error', reject);
    }

    request(url);
  });
}

// 使用示例
followRedirects('http://example.com')
  .then((res) => {
    console.log('Final URL:', res.responseUrl);
    // 处理响应数据
  })
  .catch((error) => {
    console.error('Error:', error.message);
  });