Symfony3 / Nelmio cors / fetch api - 400错误请求



正如标题所说,我有一个symfony3应用程序,在子域上有一个rest api,以便:

GET http://ajax.localhost.dev:10190/menus

返回JSON格式的菜单列表。

这是nelmio cors bundle (/app/config/nelmio/cors.yml)的配置

nelmio_cors:
  paths:
    '^/':
      origin_regex: true
      allow_origin: ['^https?://%domain%:[0-9]+']
      allow_headers: ['X-Custom-Auth']
      allow_methods: ['POST', 'PUT', 'GET', 'DELETE', 'OPTIONS']
      max_age: 3600
      hosts: ['^ajax.']
      allow_credentials: true

我一直在使用这个代码:

export default class AppRemote extends Remote {
  get host () { return `ajax.${super.host}`; }
  open(xhr, data) {
    if ("withCredentials" in xhr) { 
      xhr.open(data.method, this.url(data.url), true);
      xhr.withCredentials = true; }
    else if (typeof XDomainRequest != "undefined") {
      xhr = new XDomainRequest();
      xhr.open(data.method, this.url(data.url)); }
    else { this.app.error('cannot init CORS Request'); }
    return xhr;
  }
};

运行正常。现在我正试图将其移植到新的获取API,我使用以下代码:

const init = (url, method = 'GET') => {
  return new Request(url, {
    headers: new Headers({
      'Access-Control-Allow-Credentials': true,
      //'Access-Control-Allow-Origin': '*',
      'Access-Control-Allow-Methods' : 'POST, GET, OPTIONS'
    }),
    mode: 'cors',
    credentials: true,
    method });
}
const get = (url) => {
  return fetch(init(url));
}

返回400 Bad RequestRequest Method: OPTIONS。如果我在浏览器中输入url,它就可以工作了。

我猜有一些认证问题,但只是不知道如何解决它。我该怎么做呢?

经过一番研究,我终于发现了这个错误。多亏了Firefox,它抛出了一个错误,指向我的位置:

return new Request(url, {
  //headers: new Headers({
    //'Access-Control-Allow-Credentials': true,
    //'Access-Control-Allow-Origin': '*',
    //'Access-Control-Allow-Methods' : 'POST, GET, OPTIONS'
  //}), //<-- working without headers at all
  mode: 'cors',
  credentials: 'include', //<-- that is the right setting
  method });

Docs on MDN

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