/**
* Gets the class that will be used to determine the crop offset for the image
*
* @since 2.0
* @return SLIRCropper
*/
public final function getCropperClass()
{
$configClass = \SLIR\SLIR::getConfigClass();
$cropClass = 'SLIRCropper' . ucfirst($this->getCropper());
$fileName = $configClass::$pathToSLIR . "/core/Libs/GD/Croppers/{$cropClass}.php";
$class = '\\SLIR\\Libs\\GD\\Croppers\\SLIRCropper' . ucfirst($this->getCropper());
if (!file_exists($fileName)) {
throw new \RuntimeException('The requested cropper could not be found: ' . $fileName);
}
return new $class();
}
/**
* @return string
* @since 2.0
*/
public function getCropper()
{
$configClass = \SLIR\SLIR::getConfigClass();
if ($this->cropper !== null) {
return $this->cropper;
} else {
return $configClass::$defaultCropper;
}
}
/**
* Serves headers for file for optimal browser caching
*
* @since 2.0
* @param string $lastModified Time when file was last modified in 'D, d M Y H:i:s' format
* @param string $mimeType
* @param integer $fileSize
* @param string $slirHeader
* @return boolean true to continue, false to stop
*/
private function serveHeaders($lastModified, $mimeType, $fileSize, $slirHeader)
{
$configClass = SLIR::getConfigClass();
$this->header("Last-Modified: {$lastModified}");
$this->header("Content-Type: {$mimeType}");
$this->header("Content-Length: {$fileSize}");
// Lets us easily know whether the image was rendered from scratch,
// from the cache, or served directly from the source image
$this->header("X-Content-SLIR: {$slirHeader}");
// Keep in browser cache how long?
$this->header(sprintf('Expires: %s GMT', gmdate('D, d M Y H:i:s', time() + $configClass::$browserCacheTTL)));
// Public in the Cache-Control lets proxies know that it is okay to
// cache this content. If this is being served over HTTPS, there may be
// sensitive content and therefore should probably not be cached by
// proxy servers.
$this->header(sprintf('Cache-Control: max-age=%d, public', $configClass::$browserCacheTTL));
return $this->doConditionalGet($lastModified);
// The "Connection: close" header allows us to serve the file and let
// the browser finish processing the script so we can do extra work
// without making the user wait. This header must come last or the file
// size will not properly work for images in the browser's cache
//$this->header('Connection: close');
}
