微信登录安全域名

const express = require('express');
const axios = require('axios');
const app = express();

app.get('/auth/wechat', (req, res) => {
  const redirectUri = encodeURIComponent('http://yourdomain.com/callback');
  const scope = 'snsapi_userinfo';
  const state = 'STATE';

  const url = `https://open.weixin.qq.com/connect/oauth2/authorize?appid=YOUR_APP_ID&redirect_uri=${redirectUri}&response_type=code&scope=${scope}&state=${state}#wechat_redirect`;

  res.redirect(url);
});

app.get('/callback', async (req, res) => {
  const { code } = req.query;

  try {
    const tokenResponse = await axios.get('https://api.weixin.qq.com/sns/oauth2/access_token', {
      params: {
        appid: 'YOUR_APP_ID',
        secret: 'YOUR_APP_SECRET',
        code,
        grant_type: 'authorization_code'
      }
    });

    const { access_token, openid } = tokenResponse.data;

    const userInfoResponse = await axios.get('https://api.weixin.qq.com/sns/userinfo', {
      params: {
        access_token,
        openid,
        lang: 'zh_CN'
      }
    });

    const userInfo = userInfoResponse.data;
    res.send(`Hello, ${userInfo.nickname}!`);
  } catch (error) {
    console.error(error);
    res.status(500).send('Error');
  }
});

app.listen(3000, () => {
  console.log('Server is running on port 3000');
});