我本地测试时, HTTP使用3000端口, HTTPS使用443.

同时监听HTTP和HTTPS

参考上一篇文章Express本地测试HTTPS

转发所有GET请求

httpApp.get("*", (req, res, next) => {
    let host = req.headers.host;
    host = host.replace(/\:\d+$/, ''); // Remove port number
    res.redirect(`https://${host}${req.path}`);
});

相当于自己拼接上https的链接然后redirect. 此时浏览器会收到302 (MOVED_TEMPORARILY)状态码, 并重定向到HTTPS.

转发所有请求

httpApp.all("*", (req, res, next) => {
    let host = req.headers.host;
    host = host.replace(/\:\d+$/, ''); // Remove port number
    res.redirect(307, `https://${host}${req.path}`);
});

注意这里面有两个修改:

1. httpApp.get 改成了 httpApp.all
2. redirect时加上了第一个参数307 (TEMPORARY_REDIRECT)
   只加上第一个修改的话, 重定向的时候不会保留Method, 导致POST请求变成了GET请求. 加上第二个修改就好了.

参考:

1. How do I redirect all unmatched urls with Express?
2. Node.js with Express: how to redirect a POST request