角/节点/ EX preSS /护照 - 连接至Facebook时出现问题（CORS）

问题描述

我想要我的NodeJS服务器上使用Facebook的身份验证。我来到的教程，并把它使用REST客户端时，在本地工作（邮差等）。

i'm trying to use facebook authentication on my NodeJs server. i came to the tutorial of http://scotch.io/ and have it working locally when using a REST client(Postman, etc).

要改善UI，我用角JS作为前端。但是当我叫http.get我在的NodeJS后端给出了具体的路线我得到丁目和Firefox以下错误：

To improve the UI i used Angular JS as a front end. but when i call a http.get to my specific route given on the NodeJs back-end i get the following error in chome and firefox:

XMLHtt prequest无法加载的…0%2Fapi%2Fauth%2Ffacebook%2Fcallback&scope=email&client_id=3000000000006.无访问控制允许来源标头的请求的资源present。原产地的'localhost：8080'，因此是不允许访问

XMLHttpRequest cannot load https://www.facebook.com/dialog/oauth?response_type=code&redirect_uri=http%…0%2Fapi%2Fauth%2Ffacebook%2Fcallback&scope=email&client_id=3000000000006. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'localhost:8080' is therefore not allowed access.

我试过在计算器上几种解决方案，但它仍然没有工作...
我使用的NodeJS前preSS 4. *和CORS中间件。
对角我发现几种方式来实现CORS，没有到目前为止的工​​作。

i've tried several solutions on StackOverflow but its still not working...my NodeJs uses Express 4.* and a CORS middleware.for Angular i found several ways to enable CORS, none working so far.

我希望你能帮帮我！：D在此先感谢

I hope you can help me:D Thanks in advance!

推荐答案

我用角与节点/ EX preSS为好，下面的函数适用于我用我自己的后端服务（我目前不使用它与Facebook是诚实的），所以只检查出来：

I'm using Angular with Node/Express as well, and the following function works for me with my own backend services (I'm currently not using it with Facebook to be honest), so just check it out:

var allowCrossDomain = function(req, res, next) {
    res.header('Access-Control-Allow-Origin', '*');
    res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
    res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization, Content-Length, X-Requested-With, Access-Control-Allow-Origin');
    res.header("Access-Control-Max-Age", "86400"); // 24 hours

    // intercept OPTIONS method
    if ('OPTIONS' == req.method) {
        res.send(200);
    }
    else {
        next();
    }
};

然后，你需要使用它锡 app.confiure（）方法如下：

// configure Express
app.configure(function() {
   app.use(allowCrossDomain);
    ...
});

要使用它之前所有其他directrives这一点很重要！

It's important to use it BEFORE all other directrives!

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