/**
* Handle the common (resource independent) headers
*
* @param DAV_Resource $resource
* @return array HTTP headers
*/
protected static function common($resource)
{
$headers = $resource->method_HEAD();
if (!isset($headers['Content-Length']) && !is_null($tmp = $resource->prop_getcontentlength())) {
$headers['Content-Length'] = htmlspecialchars_decode($tmp);
}
if (!isset($headers['Content-Type'])) {
if (!is_null($tmp = $resource->prop_getcontenttype())) {
$headers['Content-Type'] = htmlspecialchars_decode($tmp);
} else {
$headers['Content-Type'] = 'application/octet-stream';
}
}
if (!isset($headers['ETag']) && !is_null($tmp = $resource->prop_getetag())) {
$headers['ETag'] = htmlspecialchars_decode($tmp);
}
if (!isset($headers['Last-Modified']) && !is_null($tmp = $resource->prop_getlastmodified())) {
$headers['Last-Modified'] = htmlspecialchars_decode($tmp);
}
if (!isset($headers['Content-Language']) && !is_null($tmp = $resource->prop_getcontentlanguage())) {
$headers['Content-Language'] = htmlspecialchars_decode($tmp);
}
$headers['Accept-Ranges'] = 'bytes';
return $headers;
}