我正在创建一个AngularJS项目,现在位于http：// localhost,在http：//api.localhost上有一个laravel后端,两者都由Nginx服务器提供服务.

在进行$http.post请求时,angular首先进行CORS OPTIONS调用,并且我已经配置了我的Nginx服务器以使用正确的标头进行响应：

    location / {
            add_header "Access-Control-Allow-Origin" "*";
            add_header "Access-Control-Allow-Credentials" "true";
            add_header "Access-Control-Allow-Methods" "GET,POST,DELETE,PUT,OPTIONS";
            add_header "Access-Control-Allow-Headers" "Keep-Alive,User-Agent,If-Modified-Since,Cache-Control,Content-Type,Authorization";
            add_header "Access-Control-Max-Age" "1728000";

            if ($request_method = 'OPTIONS') {
                    return 204;
            }


            #try_files $uri $uri/ /index.html;
            try_files $uri /index.PHP?$query_string;
    }

    location = /index.PHP {

            add_header "Access-Control-Allow-Origin" "*";
            add_header "Access-Control-Allow-Credentials" "true";
            add_header "Access-Control-Allow-Methods" "GET,Authorization";
            add_header "Access-Control-Max-Age" "1728000";

            if ($request_method = 'OPTIONS') {
                    return 204;
            }

           ...
    }

我的角度模块也配置有：

.config(['$httpProvider',function($httpProvider) {
    $httpProvider.defaults.useXDomain = true;
    delete $httpProvider.defaults.headers.common['X-Requested-With'];
}])

OPTIONS调用按预期返回：

Access-Control-Allow-Credentials:true
Access-Control-Allow-Headers:Keep-Alive,Authorization
Access-Control-Allow-Methods:GET,OPTIONS
Access-Control-Allow-Origin:*
Access-Control-Max-Age:1728000
Connection:keep-alive
Date:Mon,04 Nov 2013 02:14:16 GMT
Server:Nginx/1.2.6 (Ubuntu)

但随后的POST调用失败,状态为CANCELED,angular会向JS控制台抛出错误：

`XMLHttpRequest cannot load http://api.localhost/users/accesstokens. Origin http://localhost is not allowed by Access-Control-Allow-Origin.`

我昨晚熬夜并且工作得很好,但是当我今天再次尝试时,它又回到了原点.最糟糕的问题！

做什么？

编辑：我发现了问题,但我仍然不明白.我查看了我的Nginx访问日志,并看到POST请求实际上已经命中服务器,即使状态为CANCELED.我也看到响应是401.在我的请求正确后,响应是201.仍然是相同的取消状态.但当我将状态调整为200时,瞧！该请求按预期工作.

AngularJS是否只接受跨源请求中的200状态？