PHP CakeResponse::download方法代码示例

 /**
  * Sets the response header based on type map index name. This wraps several methods
  * available on CakeResponse. It also allows you to use Content-Type aliases.
  *
  * @param string|array $type Friendly type name, i.e. 'html' or 'xml', or a full content-type,
  *    like 'application/x-shockwave'.
  * @param array $options If $type is a friendly type name that is associated with
  *    more than one type of content, $index is used to select which content-type to use.
  * @return boolean Returns false if the friendly type name given in $type does
  *    not exist in the type map, or if the Content-type header has
  *    already been set by this method.
  * @see RequestHandlerComponent::setContent()
  */
 public function respondAs($type, $options = array())
 {
     $defaults = array('index' => null, 'charset' => null, 'attachment' => false);
     $options = $options + $defaults;
     $cType = $type;
     if (strpos($type, '/') === false) {
         $cType = $this->response->getMimeType($type);
     }
     if (is_array($cType)) {
         if (isset($cType[$options['index']])) {
             $cType = $cType[$options['index']];
         }
         if ($this->prefers($cType)) {
             $cType = $this->prefers($cType);
         } else {
             $cType = $cType[0];
         }
     }
     if (!$type) {
         return false;
     }
     if (empty($this->request->params['requested'])) {
         $this->response->type($cType);
     }
     if (!empty($options['charset'])) {
         $this->response->charset($options['charset']);
     }
     if (!empty($options['attachment'])) {
         $this->response->download($options['attachment']);
     }
     return true;
 }

 /**
  * Tests the download method
  *
  */
 public function testDownload()
 {
     $response = new CakeResponse();
     $expected = array('Content-Disposition' => 'attachment; filename="myfile.mp3"');
     $response->download('myfile.mp3');
     $this->assertEquals($expected, $response->header());
 }

 /**
  * Display or download the given file
  *
  * @param string $view Not used
  * @param string $layout Not used
  * @return mixed
  * @throws NotFoundException
  */
 public function render($view = null, $layout = null)
 {
     $name = $download = $extension = $id = $modified = $path = $cache = $mimeType = $compress = null;
     extract($this->viewVars, EXTR_OVERWRITE);
     if (is_dir($path)) {
         $path = $path . $id;
     } else {
         $path = APP . $path . $id;
     }
     if (!is_file($path)) {
         if (Configure::read('debug')) {
             throw new NotFoundException(sprintf('The requested file %s was not found', $path));
         }
         throw new NotFoundException('The requested file was not found');
     }
     if (is_array($mimeType)) {
         $this->response->type($mimeType);
     }
     if (isset($extension) && $this->_isActive()) {
         $extension = strtolower($extension);
         $chunkSize = 8192;
         $buffer = '';
         $fileSize = @filesize($path);
         $handle = fopen($path, 'rb');
         if ($handle === false) {
             return false;
         }
         if (!empty($modified) && !is_numeric($modified)) {
             $modified = strtotime($modified, time());
         } else {
             $modified = time();
         }
         if ($this->response->type($extension) === false) {
             $download = true;
         }
         if ($cache) {
             $this->response->cache($modified, $cache);
         } else {
             $this->response->header(array('Date' => gmdate('D, d M Y H:i:s', time()) . ' GMT', 'Expires' => '0', 'Cache-Control' => 'private, must-revalidate, post-check=0, pre-check=0', 'Pragma' => 'no-cache'));
         }
         if ($download) {
             $agent = env('HTTP_USER_AGENT');
             if (preg_match('%Opera(/| )([0-9].[0-9]{1,2})%', $agent)) {
                 $contentType = 'application/octetstream';
             } else {
                 if (preg_match('/MSIE ([0-9].[0-9]{1,2})/', $agent)) {
                     $contentType = 'application/force-download';
                 }
             }
             if (!empty($contentType)) {
                 $this->response->type($contentType);
             }
             if (is_null($name)) {
                 $name = $id;
             }
             $this->response->download($name);
             $this->response->header(array('Accept-Ranges' => 'bytes'));
             $httpRange = env('HTTP_RANGE');
             if (isset($httpRange)) {
                 list($toss, $range) = explode('=', $httpRange);
                 $size = $fileSize - 1;
                 $length = $fileSize - $range;
                 $this->response->header(array('Content-Length' => $length, 'Content-Range' => 'bytes ' . $range . $size . '/' . $fileSize));
                 $this->response->statusCode(206);
                 fseek($handle, $range);
             } else {
                 $this->response->header('Content-Length', $fileSize);
             }
         } else {
             $this->response->header(array('Content-Length' => $fileSize));
         }
         $this->_clearBuffer();
         if ($compress) {
             $this->_compressionEnabled = $this->response->compress();
         }
         $this->response->send();
         return $this->_sendFile($handle);
     }
     return false;
 }