我有https://stackoverflow.com/a/7454204/13779574这段代码工作得很好，但当用户进入该页面时给出一个错误。 我用这段代码解决了这个问题。

if (isset($_SERVER['HTTP_ORIGIN'])) {
   $http_origin = $_SERVER['HTTP_ORIGIN'];
   if ($http_origin == "http://localhost:3000" || $http_origin == "http://api.loc/"){  
      header("Access-Control-Allow-Origin: $http_origin");
   }
}

PHP代码:

$httpOrigin = isset($_SERVER['HTTP_ORIGIN']) ? $_SERVER['HTTP_ORIGIN'] : null;
if (in_array($httpOrigin, [
    'http://localhost:9000', // Co-worker dev-server
    'http://127.0.0.1:9001', // My dev-server
])) header("Access-Control-Allow-Origin: ${httpOrigin}");
header('Access-Control-Allow-Credentials: true');

对于安装了URL重写2.0模块的iis7.5 +，请参阅此SO答案

我们也可以在全局中设置这个。asax文件用于Asp.net应用程序。

protected void Application_BeginRequest(object sender, EventArgs e)
    {

    // enable CORS
    HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "https://www.youtube.com");

    }

Django中还有一个答案。要让一个视图允许来自多个域的CORS，以下是我的代码:

def my_view(request):
    if 'HTTP_ORIGIN' in request.META.keys() and request.META['HTTP_ORIGIN'] in ['http://allowed-unsecure-domain.com', 'https://allowed-secure-domain.com', ...]:
        response = my_view_response() # Create your desired response data: JsonResponse, HttpResponse...
        # Then add CORS headers for access from delivery
        response["Access-Control-Allow-Origin"] = request.META['HTTP_ORIGIN']
        response["Access-Control-Allow-Methods"] = "GET" # "GET, POST, PUT, DELETE, OPTIONS, HEAD"
        response["Access-Control-Max-Age"] = "1000"  
        response["Access-Control-Allow-Headers"] = "*"  
        return response

这招对我很管用:

SetEnvIf Origin "^http(s)?://(.+\.)?(domain\.example|domain2\.example)$" origin_is=$0 
Header always set Access-Control-Allow-Origin %{origin_is}e env=origin_is

当放入。htaccess时，它肯定会工作。