-function get_url_info($url)
-{
-  $ch = curl_init($url);
-  curl_setopt_array($ch, array(
-      CURLOPT_HEADER => TRUE,
-      CURLOPT_NOBODY => TRUE,
-      CURLOPT_FOLLOWLOCATION => TRUE,  // follow http redirects to get the real URL
-      CURLOPT_RETURNTRANSFER => TRUE,
-      CURLOPT_SSL_VERIFYHOST => FALSE,
-      CURLOPT_SSL_VERIFYPEER => FALSE,
-      CURLOPT_USERAGENT => USER_AGENT,
-  ));
-  curl_exec($ch);
-  $url_info = curl_getinfo($ch);;
-  curl_close($ch);
-
-  return $url_info;
-}
-
-function generate_enclosure($url)
-{
-  $supported_content_types = array(
-    "application/ogg",
-    "audio/aac",
-    "audio/mp4",
-    "audio/mpeg",
-    "audio/vorbis",
-    "audio/wav",
-    "audio/webm",
-    "audio/x-midi",
-    "image/gif",
-    "image/jpeg",
-    "video/avi",
-    "video/mp4",
-    "video/mpeg",
-    "video/ogg",
-  );
-
-  $url_info = get_url_info($url);
-
-  $supported = in_array($url_info['content_type'], $supported_content_types);
-  if (!$supported) {
-    error_log("Unsupported enclosure content type \"" . $url_info['content_type'] . "\" for URL: " . $url_info['url']);
-    return '';
-  }