< – Inhaltsverzeichnis – >
Das Filter Interface und die Chain-Klasse, wir bedienen uns dabei dem Composite Pattern. Ich stelle hier auch noch 2 Beispiel Filter zur Verfügung(uhhhh, wie großzügig :D)

• FW_Filter_Interface:

  /** (c) 2010 Arne "w13531" Wenzel [ mailto: w13531 (at) terrorhippiecrew (dot) net ] **/
  interface FW_Filter_Interface {
      public function execute(FW_Http_Request $request, FW_Http_Response $response);
  }
  

• FW_Filter_Chain:

  /** (c) 2010 Arne "w13531" Wenzel [ mailto: w13531 (at) terrorhippiecrew (dot) net ] **/
  class FW_Filter_Chain extends FW_Object implements FW_Filter_Interface {
  
      private $filters = array();
  
      public function addFilter(FW_Filter_Interface $filter) {
          $this->filters[] = $filter;
      }
  
      public function execute(FW_Http_Request $req, FW_Http_Response $res) {
          foreach($this->filters as $filter) {
              $filter->execute($req, $res);
          }
      }
  
  }
  

• FW_GZip_Filter:

  /** (c) 2010 Arne "w13531" Wenzel [ mailto: w13531 (at) terrorhippiecrew (dot) net ] **/
  class FW_GZip_Filter implements FW_Filter_Interface {
  
    public function execute(FW_Http_Request $request, FW_Http_Response $response) {
  
          if($request->getHeader('accept_encoding') && strpos($request->getHeader('accept_encoding'), 'gzip') !== false) {
  
              $txt = $response->getContent();
  
              if(DEVELOPMENT_ENVIRONMENT == false) {
  
                  $response->addHeader('Content-Encoding', 'gzip');
                  $txt = gzencode($txt, 9);
  
              }
  
              $response->replaceContent($txt);
          }
    }
  
  }
  

• FW_Headers_Filter:

  /** (c) 2010 Arne "w13531" Wenzel [ mailto: w13531 (at) terrorhippiecrew (dot) net ] **/
  class FW_Headers_Filter implements FW_Filter_Interface {
  
    public function execute(FW_Http_Request $request, FW_Http_Response $response) {
  
          $response->addHeader('X-Powered-By', 'RIAD-F');
          $response->addHeader('Server', 'RIAD-F Application Server');
  
    }
  
  }