예제 #1
0
 /**
  * Intercept a request for a cached image from the proxy and output it
  *
  * @param string|bool $error If non-false, an error that occurred when validating the request
  */
 protected function _outputImage($error)
 {
     if (empty(XenForo_Application::getOptions()->imageLinkProxy['images'])) {
         $error = 'disabled';
     }
     /* @var $proxyModel XenForo_Model_ImageProxy */
     $proxyModel = XenForo_Model::create('XenForo_Model_ImageProxy');
     $image = false;
     if (!$error) {
         $urlParts = parse_url($this->_url);
         if ($this->_isLocalHost($urlParts['host']) && (empty($_SERVER['SERVER_NAME']) || !$this->_isLocalHost($_SERVER['SERVER_NAME']))) {
             $error = 'local_url';
         }
     }
     if (!$error) {
         $image = $proxyModel->getImage($this->_url);
         if ($image) {
             $image = $proxyModel->prepareImage($image);
             if ($image['use_file']) {
                 $proxyModel->logImageView($image);
                 $eTag = !empty($_SERVER['HTTP_IF_NONE_MATCH']) ? $_SERVER['HTTP_IF_NONE_MATCH'] : null;
                 if ($eTag && $eTag == '"' . $image['fetch_date'] . '"') {
                     $this->_response->setHttpResponseCode(304);
                     $this->_response->clearHeader('Last-Modified');
                     $this->_response->sendHeaders();
                     return;
                 }
             } else {
                 $image = false;
                 $error = 'retrieve_failed';
             }
         }
     }
     if (!$image) {
         $image = $proxyModel->getPlaceHolderImage();
     }
     $imageTypes = array('image/gif', 'image/jpeg', 'image/pjpeg', 'image/png');
     if (in_array($image['mime_type'], $imageTypes)) {
         $this->_response->setHeader('Content-type', $image['mime_type'], true);
         $this->_setDownloadFileName($image['file_name'], true);
     } else {
         $this->_response->setHeader('Content-type', 'application/octet-stream', true);
         $this->_setDownloadFileName($image['file_name']);
     }
     if (!$error) {
         $this->_response->setHeader('ETag', '"' . $image['fetch_date'] . '"', true);
     }
     if ($image['file_size']) {
         $this->_response->setHeader('Content-Length', $image['file_size'], true);
     }
     $this->_response->setHeader('X-Content-Type-Options', 'nosniff');
     if ($error) {
         $this->_response->setHeader('X-Proxy-Error', $error);
     }
     $this->_response->sendHeaders();
     $imageData = new XenForo_FileOutput($image['file_path']);
     $imageData->output();
 }