/**
* When displaying cached content, set the Content-Type header for the
* content item or asset
*/
public static function filter_cached_content_headers($headers)
{
global $wp;
$cache_frame_id = !empty($wp->query_vars['amber_cacheframe']) ? $wp->query_vars['amber_cacheframe'] : "";
$cache_id = !empty($wp->query_vars['amber_cache']) ? $wp->query_vars['amber_cache'] : "";
$asset_id = !empty($wp->query_vars['amber_asset']) ? $wp->query_vars['amber_asset'] : "";
$asset_id = rtrim($asset_id, "/");
/* Get rid of stray characters on the end */
if (!empty($cache_frame_id)) {
if (empty($asset_id)) {
/* This is the root item */
$data = Amber::retrieve_cache_item($cache_frame_id);
if (isset($data['metadata']['type'])) {
$headers['Content-Type'] = $data['metadata']['type'];
}
} else {
/* This is an asset */
$data = Amber::retrieve_cache_asset($cache_frame_id, $asset_id);
if (isset($data['metadata']['type'])) {
$headers['Content-Type'] = $data['metadata']['type'];
}
}
}
if ((!empty($cache_id) || !empty($cache_frame_id)) && empty($asset_id)) {
if (!isset($data)) {
$data = Amber::retrieve_cache_item($cache_id);
}
// Add Memento header to cache iframe and cache item
if (isset($data['metadata']['cache']['amber']['date'])) {
$memento_date = Amber::format_memento_date($data['metadata']['cache']['amber']['date']);
$headers['Memento-Datetime'] = $memento_date;
}
// PDFs are rendered immediately, not displayed within iframes,
// so set the content-type appropriately
if (isset($data['metadata']['type']) && $data['metadata']['type'] == 'application/pdf') {
$headers['Content-Type'] = $data['metadata']['type'];
}
}
return $headers;
}
