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- <?php
- /**
- * @file
- * XML data retrieval and storage API for Media.
- */
- /**
- * A wrapper around simplexml to retrieve a given XML file.
- *
- * @param $url
- * The URL to the XML to retrieve.
- * @param $display_errors
- * Optional; if TRUE, then we'll display errors to the end user. They'll be
- * logged to the watchdog in any case.
- * @param $refresh
- * Optional; if TRUE, then we'll force a new load of the XML. Otherwise,
- * a cached version will be retrieved if possible.
- * @return
- * A fully populated object, or FALSE on an error.
- */
- function _media_retrieve_xml($url, $display_errors = FALSE, $refresh = FALSE) {
- $xmls = &drupal_static(__FUNCTION__, array());
- // Return our cached XML if allowed, and it exists.
- if (!$refresh && isset($xmls[$url])) {
- return $xmls[$url];
- }
- elseif (!$refresh && $cache = cache_get('media:xml:' . $url, 'cache_media_xml')) {
- $xmls[$url] = $cache->data;
- return $xmls[$url];
- }
- // Enable user error handling.
- libxml_use_internal_errors(TRUE);
- // Load the document
- $xml = simplexml_load_file($url);
- if (!$xml) {
- foreach (libxml_get_errors() as $error) {
- $params = array('%url' => $url, '%error' => $error->message);
- // Handle errors here.
- if ($display_errors) {
- drupal_set_message(t('Error retrieving XML from %url: %error', $params), 'error');
- }
- watchdog('media', 'Error retrieving XML from %url: %error', $params, WATCHDOG_WARNING);
- }
- // Clear our error cache.
- libxml_clear_errors();
- // Set the static cache, but not Drupal's cache, so we can attempt to
- // retrieve the file another time if possible.
- $xmls[$url] = FALSE;
- }
- else {
- $xmls[$url] = _media_unserialize_xml($xml);
- cache_set('media:xml:' . $url, $xmls[$url], 'cache_media_xml', media_variable_get('xml_cache_expire', 3600));
- }
- return $xmls[$url];
- }
- /**
- * Recursively converts a SimpleXMLElement object into an array.
- * @param $xml
- * The original XML object.
- */
- function _media_unserialize_xml($xml) {
- if ($xml instanceof SimpleXMLElement) {
- $xml = (array) $xml;
- }
- if (is_array($xml)) {
- foreach ($xml as $key => $item) {
- $xml[$key] = _media_unserialize_xml($item);
- }
- }
- return $xml;
- }
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