在Node.js中为多个域启用Access-Control-Allow-Origin

问题描述

我试图在node.js中允许CORS，但问题是，如果设置了Access-Control-Allow-Credentials，则无法将*设置为Access-Control-Allow-Origin.

I'm trying to allow CORS in node.js but the problem is that I can't set * to Access-Control-Allow-Origin if Access-Control-Allow-Credentials is set.

规范还说我不能为Access-Control-Allow-Origin做一个数组或逗号分隔的值，建议的方法是做与此类似的事情

Also the specification said I can't do an array or comma separated value for Access-Control-Allow-Origin and the suggested method would be to do something similar to this Access-Control-Allow-Origin Multiple Origin Domains?

但是我似乎无法在node.js中做到这一点

But I can't seem to do this way in node.js

["http://mydomain.com:9001", "http://mydomain.com:5001"].map(function(domain) {
  res.setHeader( "Access-Control-Allow-Origin", domain );
});
res.header( "Access-Control-Allow-Credentials", true );

这里的问题是它会被数组中的最后一个值覆盖，因此标头将设置为res.setHeader( "Access-Control-Allow-Origin", "http://mydomain.com:5001" );

The problem here is that it's bein override by the last value in the array, so the header will be set to res.setHeader( "Access-Control-Allow-Origin", "http://mydomain.com:5001" );

来自客户端浏览器的错误:

Error from the client browser:

推荐答案

这是我在快速申请中使用的允许多个来源的

Here is what I use in my express application to allow multiple origins

app.use(function(req, res, next) {
  var allowedOrigins = ['http://127.0.0.1:8020', 'http://localhost:8020', 'http://127.0.0.1:9000', 'http://localhost:9000'];
  var origin = req.headers.origin;
  if(allowedOrigins.indexOf(origin) > -1){
       res.setHeader('Access-Control-Allow-Origin', origin);
  }
  //res.header('Access-Control-Allow-Origin', 'http://127.0.0.1:8020');
  res.header('Access-Control-Allow-Methods', 'GET, OPTIONS');
  res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization');
  res.header('Access-Control-Allow-Credentials', true);
  return next();
});

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