在重定向之前设置Express响应标头 [英] Set Express response headers before redirect

问题描述

我正在实施一个站点登录，它接收一个电子邮件/密码组合，检索一个API令牌，然后将其返回给用户，以便在localStorage中存储（加密）。

I'm implementing a site login that takes in an email/password combo, retrieves an API token, and returns it to the user to get stored (encrypted) in localStorage.

目前，在成功发布到 / login 后，应用程序会将用户重定向到索引页面，并带有令牌作为查询附加，如此（建议此处）：

Currently, on successful POSTing to /login, the app redirects the user to the index page, with the token attached as a query, like so (as suggested here):

login.post('/', function(req, res) {
    ...checking password...

    Auth.getToken(user, function(err, token) {
        res.redirect('/?token=' + token);
    });
});

这样可行，但我希望尽可能保持网址清洁并设置令牌作为标题代替：

This works fine, but I'd prefer to keep my URLs as clean as possible and set the token as a header instead:

login.post('/', function(req, res) {
    ...checking password...

    Auth.getToken(user, function(err, token) {
        res.set('x-access-token', token);
        console.log(res._headers);
            // --> {'x-powered-by': 'Express', 'x-access-token': <token>}
        res.redirect('/');
    });
});

console.log -ing res._headers 显示标题已按预期设置，但当我在索引页面的请求上记录 req.headers 时，它没有出现：

console.log-ing res._headers shows that the headers are set as expected, but when I log req.headers on the request to the index page, it's not showing up:

{ host: 'localhost:3000',
  connection: 'keep-alive',
 'cache-control': 'max-age=0',
 accept: 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
 'upgrade-insecure-requests': '1',
 'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.36',
 referer: 'http://localhost:3000/login',
 'accept-encoding': 'gzip, deflate, sdch',
 'accept-language': 'en-US,en;q=0.8',
 cookie: 'ifusr=crwj; _ga=GA1.1.1933420201.1409901705',
 'if-none-match': '"1195161647"' }

任何建议都赞赏！

推荐答案

设置标题在这里不起作用，因为重定向将执行新的http请求，您可以使用 express-session 存储身份验证令牌并在需要时获取

Setting headers wouldn't work here because a redirect will execute a new http request, you can use express-session to store the auth token and fetch it when you need it

req.session.accessToken = token

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