/**
* Wrapper to the real, fast resizing
* @return void
*/
private function resizeImage()
{
//Load the image-dimensions
if (is_file(_realpath_ . $this->strFilename) && (uniStrpos($this->strFilename, "/files") !== false || uniStrpos($this->strFilename, "/templates") !== false)) {
//check headers, maybe execution could be terminated right here
if (checkConditionalGetHeaders(md5(md5_file(_realpath_ . $this->strFilename) . $this->intMaxWidth . $this->intMaxHeight . $this->intFixedWidth . $this->intFixedHeight))) {
class_response_object::getInstance()->sendHeaders();
return;
}
$objImage = new class_image2();
$objImage->load($this->strFilename);
$objImage->addOperation(new class_image_scale_and_crop($this->intFixedWidth, $this->intFixedHeight));
$objImage->addOperation(new class_image_scale($this->intMaxWidth, $this->intMaxHeight));
//send the headers for conditional gets
setConditionalGetHeaders(md5(md5_file(_realpath_ . $this->strFilename) . $this->intMaxWidth . $this->intMaxHeight . $this->intFixedWidth . $this->intFixedHeight));
//TODO: add expires header for browser caching (optional)
/*
$intCacheSeconds = 604800; //default: 1 week (60*60*24*7)
header("Expires: ".gmdate("D, d M Y H:i:s", time() + $intCacheSeconds)." GMT", true);
header("Cache-Control: public, max-age=".$intCacheSeconds, true);
header("Pragma: ", true);
*/
//and send it to the browser
$objImage->setJpegQuality((int) $this->intQuality);
$objImage->sendToBrowser();
return;
}
class_response_object::getInstance()->setStrStatusCode(class_http_statuscodes::SC_NOT_FOUND);
class_response_object::getInstance()->sendHeaders();
}
/**
* Sends conditional get headers and tries to match sent ones.
*
* @param string $strContent
* @return void
*/
private function sendConditionalGetHeaders($strContent)
{
//check headers, maybe execution could be terminated right here
//yes, this doesn't save us from generating the page, but the traffic towards the client can be reduced
if (checkConditionalGetHeaders(md5($_SERVER["REQUEST_URI"] . $this->objSession->getSessionId() . $strContent))) {
class_response_object::getInstance()->sendHeaders();
flush();
die;
}
//send headers if not an ie
if (strpos(getServer("HTTP_USER_AGENT"), "IE") === false) {
setConditionalGetHeaders(md5($_SERVER["REQUEST_URI"] . $this->objSession->getSessionId() . $strContent));
}
}