Symfony事件监听

参考链接1
参考链接2

监听请求、响应示例

修改[项目路径]\src\ListenAllBundle\Resources\config\services.yml

 services:
     listen_all:
         class: ListenAllBundle\Service\ListenAll
         # 这里可以传递服务、普通数据、参数, 如不明白可看：【symfony:symfony服务】一节
         #arguments: ["@service_id", "plain_value", "%parameter%"]
         tags:
             # name: 名字-监听, event:事件-请求, method:方法-Service方法名 priority: 优先级-0~255
             - {name: kernel.event_listener, event: kernel.request, method: onKernelRequest, priority: 255}
             # name: 名字-监听, event:事件-响应, method:方法-Service方法名 priority: 优先级-0~255
             - {name: kernel.event_listener, event: kernel.response, method: onKernelResponse, priority: 254}

修改[项目路径]\src\ListenAllBundle\Service\ListenAll.php

 <?php

 namespace ListenAllBundle\Service;

 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\HttpKernel\Event\FilterResponseEvent;

 class ListenAll
 {
     /**
      * 请求时拒绝没有权限的用户访问
      */
     public function onKernelRequest(GetResponseEvent $event)
     {
         $request_method = $_SERVER['REQUEST_METHOD'];
         //在1=2条件下,Ajax请求直接被驳回
         if (1 === 2 && isset($_SERVER['HTTP_ORIGIN'])) {
             $response = new Response();
             $response->headers->set('Access-Control-Allow-Credentials', 'true');
             $response->headers->set('Content-Type', "application/json;charset=UTF-8");
             $response->headers->set('Access-Control-Allow-Origin', $_SERVER['HTTP_ORIGIN']);
             $response->headers->set('Access-Control-Allow-Methods', 'POST,DELETE,PUT,GET,HEAD,PATCH,OPTIONS');
             $response->setContent(json_encode(['code' => 403, 'data' =>[], 'msg' => 'Access denied.'], JSON_UNESCAPED_UNICODE));
             $event->setResponse($response);
         }
     }

     /**
      * 响应时允许相同二级域名跨域
      */
     public function onKernelResponse(FilterResponseEvent $event)
     {
         $response = $event->getResponse();
         $host = $this->getParentDomain($_SERVER['HTTP_HOST']);
         if (isset($_SERVER['HTTP_ORIGIN'])) {
             $origin = $this->getParentDomain($_SERVER['HTTP_ORIGIN']);
             if ($host == $origin) {
                 $response->headers->set('Access-Control-Allow-Credentials', 'true');
                 $response->headers->set('Access-Control-Allow-Origin', $_SERVER['HTTP_ORIGIN']);
                 $response->headers->set('Access-Control-Allow-Methods', 'POST,DELETE,PUT,GET,HEAD,PATCH,OPTIONS');
             }
         }
     }

     /**
      * 获取二级域名
      */
     private function getParentDomain(string $domain)
     {
         $domain = preg_replace('/^(.*)?:\/\//', '', $domain);
         $domain_arr = explode(':', $domain);
         $domain = $domain_arr[0];
         $is_ip = filter_var($domain, FILTER_VALIDATE_IP);
         if ($is_ip) {
             return $domain;
         }
         $domain = trim($domain, '.');
         $domain_arr = explode('.', $domain);
         if (count($domain_arr) === 1) {
             $domain = $domain_arr[0];
         } else {
             array_shift($domain_arr);
             $domain = implode('.', $domain_arr);
         }
         return $domain;
     }
 }

symfony监听

Symfony事件监听

results matching ""

No results matching ""