js获取微信头像

// 引导用户授权
const redirectUri = encodeURIComponent('http://yourdomain.com/callback');
const authUrl = `https://open.weixin.qq.com/connect/oauth2/authorize?appid=YOUR_APPID&redirect_uri=${redirectUri}&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect`;

// 回调页面处理
app.get('/callback', async (req, res) => {
  const code = req.query.code;
  const tokenResponse = await fetch(`https://api.weixin.qq.com/sns/oauth2/access_token?appid=YOUR_APPID&secret=YOUR_APPSECRET&code=${code}&grant_type=authorization_code`);
  const tokenData = await tokenResponse.json();
  const accessToken = tokenData.access_token;
  const openId = tokenData.openid;

  // 获取用户信息
  const userInfoResponse = await fetch(`https://api.weixin.qq.com/sns/userinfo?access_token=${accessToken}&openid=${openId}&lang=zh_CN`);
  const userInfo = await userInfoResponse.json();
  const avatarUrl = userInfo.headimgurl;

  // 使用头像URL
  console.log(avatarUrl);
  res.send(`头像URL: ${avatarUrl}`);
});