private function checkIfModified($lastModifiedTime)
{
if ($lastModifiedTime === false) {
return false;
}
if (!$this->request->hasHeader('If-Modified-Since')) {
return false;
}
$header = $this->request->getHeader('If-Modified-Since');
$clientModifiedTime = @strtotime($header);
if ($clientModifiedTime == false) {
return false;
}
if ($clientModifiedTime < $lastModifiedTime) {
return false;
}
return true;
}
function cachedImageCallable(PageInfo $pageInfo, Request $request, Response $response, CachingFileResponseFactory $fileResponseFactory, $params)
{
$filename = getImageCacheFilename($pageInfo, $params);
$extensions = ["jpg", 'jpeg', "gif", "png"];
$contentType = false;
$filenameFound = false;
foreach ($extensions as $extension) {
$filenameWithExtension = $filename . "." . $extension;
if (file_exists($filenameWithExtension) == true) {
//TODO - content type should actually be image/jpeg
$contentType = "image/" . $extension;
$filenameFound = $filenameWithExtension;
break;
}
}
if ($filenameFound == false) {
return false;
}
if ($request->hasHeader('HTTP_IF_MODIFIED_SINCE')) {
$lastModifiedTime = filemtime($filenameFound);
if (strtotime($request->getHeader('HTTP_IF_MODIFIED_SINCE')) >= $lastModifiedTime) {
$response->setStatus(304);
return new EmptyBody();
}
}
return $fileResponseFactory->create($filenameFound, $contentType);
}