@
albertofwb 我知道的流程如图所示,如果理解没错的话,用户被引导到请求 code 的链接这个步骤中,是微信内置的浏览器
和微信服务器经过多次 HTTPS 握手交换才返回带 code 的链接重定向到商家页面.
曾经尝试模拟微信内置浏览器到请求链接,改不改 agent 都被识别出来了,都返回
```
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=0">
</head>
<body>
<script type="text/javascript">
var ua = navigator.userAgent.toLowerCase();
var isWeixin = ua.indexOf('micromessenger') != -1;
var isAndroid = ua.indexOf('android') != -1;
var isIos = (ua.indexOf('iphone') != -1) || (ua.indexOf('ipad') != -1);
if (!isWeixin) {
document.head.innerHTML = '<title>抱歉，出错了</title><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=0"><link rel="stylesheet" type="text/css" href="
https://res.wx.qq.com/open/libs/weui/0.4.1/weui.css">';
document.body.innerHTML = '<div class="weui_msg"><div class="weui_icon_area"><i class="weui_icon_info weui_icon_msg"></i></div><div class="weui_text_area"><h4 class="weui_msg_title">请在微信客户端打开链接</h4></div></div>';
}
</script>
</body>
</html>
```
获取不了带 code 的重定向链接.