public static function getAccept($allowTypes = [])
{
static $accept;
if (!$accept) {
// get header from request
$header = self::getHeader('accept');
// make array if types
$header = explode(',', $header);
$header = array_map('trim', $header);
// result store
$types = [];
foreach ($header as $a) {
// the default quality is 1.
$q = 1;
// check if there is a different quality
if (strpos($a, ';q=') or strpos($a, '; q=')) {
// divide "mime/type;q=X" into two parts: "mime/type" i "X"
$res = preg_split('/;([ ]?)q=/', $a);
$a = $res[0];
$q = $res[1];
}
// remove other extension
if (strpos($a, ';')) {
$a = substr($a, 0, strpos($a, ';'));
}
// mime-type $a is accepted with the quality $q
// WARNING: $q == 0 means, that mime-type isn’t supported!
$types[$a] = (double) $q;
}
arsort($types);
$accept = $types;
}
// if no parameter was passed, just return parsed data
if (empty($allowTypes)) {
return $accept;
}
$mimeTypes = array_map('strtolower', $allowTypes);
// let’s check our supported types:
foreach ($accept as $mime => $q) {
if ($q && in_array($mime, $mimeTypes)) {
return $mime;
}
}
// no mime-type found
return null;
} break;
case 501:
$title = __("Not Implemented");
$description = __("The server does not understand or does not support the HTTP method");
break;
case 503:
$title = __("Service Unavailable");
$description = __("The server is currently unable to handle the request due to a temporary overloading");
Response::setHeader('Retry-After', '600');
break;
default:
$title = __("Internal Server Error");
$description = __("An unexpected error occurred with your request. Please try again later");
break;
}
// check CLI or HTTP request
if (Request::isHttp()) {
// simple AJAX call, accept JSON
if (Request::getAccept(['application/json'])) {
$this->useJson();
Messages::addError($description);
return null;
}
// dialog AJAX call, accept HTML
if (!Request::isXmlHttpRequest()) {
$this->useLayout('small.phtml');
}
}
Layout::title($title);
return ['error' => $title, 'description' => $description];
};
