流明:启用CORS

Lumen: Enable CORS

本文关键字：CORS 启用 流明      更新时间：2023-09-26

我用Lumen构建了一个API，并希望用JavaScript和XMLHttpRequest对象访问它。但每次我的PUT、GET、POST和DELETE请求都被转换为OPTIONS-Request。我读了很多关于CORS信息的网站。我用以下内容构建中间件：

class CORSMiddleware
{
    public function handle($request, 'Closure $next)
    {
      $response = null;
      /* Preflight handle */
      if ($request->isMethod('OPTIONS')) {
         $response = new Response();
      } else {
         $response = $next($request);
      }
      $response->header('Access-Control-Allow-Methods', 'OPTIONS, HEAD, GET, POST, PUT, DELETE');
      $response->header('Access-Control-Allow-Headers', $request->header('Access-Control-Request-Headers'));
      $response->header('Access-Control-Allow-Origin', '*');
      return $response;
    }
}

我的客户代码：

var url = "http://localhost:8000/api/user";
var xmlHttpRequest = new XMLHttpRequest();
xmlHttpRequest.open('PUT', url, false);
xmlHttpRequest.send('{"username": "ABC", "password": "ABC","email": "mail@cool.xyz" }');
if (xmlHttpRequest.status == 200) {
  console.log(xmlHttpRequest.responseText);
}

我的GET请求信息：

Host: localhost:8000
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: de,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate
Origin: null
Connection: keep-alive
Cache-Control: max-age=0

我的GET请求响应信息：

Access-Control-Allow-Methods: OPTIONS, HEAD, GET, POST, PUT, DELETE
Access-Control-Allow-Origin: *
Cache-Control: no-cache
Connection: close
Content-Type: text/html; charset=UTF-8
Date: Sun, 27 Dec 2015 10:36:51 GMT
Host: localhost:8000
x-powered-by: PHP/7.0.0

PUT请求的我的请求信息：

Host: localhost:8000
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: de,en-US;q=0.7,en;q=0.3
Accept-Encoding: gzip, deflate
Access-Control-Request-Method: PUT
Origin: null
Connection: keep-alive
Cache-Control: max-age=0

我的PUT请求的响应信息：

Cache-Control: no-cache
Connection: close
Content-Type: text/html; charset=UTF-8
Date: Sun, 27 Dec 2015 10:36:51 GMT
Host: localhost:8000
x-powered-by: PHP/7.0.0

飞行前没有"Access Control Allow-*"-标头。我不知道为什么；我用我的lume-cors中间件启用了它。

将以下标头添加到公共/.htaccess文件中。

Header set Access-Control-Allow-Origin "*" 
Header set  Access-Control-Allow-Methods "GET,POST,PUT,DELETE,OPTIONS"
Header set Access-Control-Allow-Credentials "true"

这对于解决跨来源问题非常有效。

在Lumen中，需要为每个POST, PUT, DELETE...路由手动设置OPTIONS路由。

这就是我为解决问题所做的。

$app->options('{all:.*}', ['middleware' => 'cors.options', function() {
    return response('');
}]);

上面的路由将为您捕获所有OPTIONS请求。

在cors.options中间件中：

public function handle($request, Closure $next)
{
    return $next($request)
        ->header('Access-Control-Allow-Origin', $_SERVER['HTTP_ORIGIN'])
        ->header('Access-Control-Allow-Methods', 'PUT, POST, DELETE')
        ->header('Access-Control-Allow-Headers', 'Accept, Content-Type,X-CSRF-TOKEN')
        ->header('Access-Control-Allow-Credentials', 'true');
}
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