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

问题描述

我正在尝试在node.js中允许CORS，但是问题是我无法将 * 设置为 Access-Control-Allow -Origin 如果设置了 Access-Control-Allow-Credentials 。

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.

规范也说我可以不要为 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

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?

但我似乎在node.js

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

["http://example.com:9001", "http://example.com:5001"].map(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://example.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://example.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((req, res, next) => {
  const allowedOrigins = ['http://127.0.0.1:8020', 'http://localhost:8020', 'http://127.0.0.1:9000', 'http://localhost:9000'];
  const origin = req.headers.origin;
  if (allowedOrigins.includes(origin)) {
       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();
});

这篇关于在Node.js中为多个域启用Access-Control-Allow-Origin的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！