-require_once 'XML/Serializer.php';
-
-date_default_timezone_set('UTC');
-
-class Tweeper {
-
- private static $USER_AGENT = "Mozilla/5.0 (Windows NT 6.1; rv:22.0) Gecko/20130405 Firefox/22.0";
-
- public function __construct($generate_enclosure = FALSE) {
- $this->generate_enclosure = $generate_enclosure;
- }
-
- public static function epoch_to_gmdate($timestamp)
- {
- return gmdate('D, d M Y H:i:s', $timestamp) . ' GMT';
- }
-
- public static function str_to_gmdate($date)
- {
- $timestamp = strtotime($date);
- return Tweeper::epoch_to_gmdate($timestamp);
- }
-
- private static function get_contents($url)
- {
- $ch = curl_init($url);
- curl_setopt_array($ch, array(
- CURLOPT_HEADER => FALSE,
- CURLOPT_FOLLOWLOCATION => TRUE, // follow http redirects to get the real URL
- CURLOPT_RETURNTRANSFER => TRUE,
- CURLOPT_SSL_VERIFYHOST => FALSE,
- CURLOPT_SSL_VERIFYPEER => FALSE,
- CURLOPT_HTTPHEADER => array('Accept-language: en'),
- CURLOPT_USERAGENT => Tweeper::$USER_AGENT,
- ));
- $contents = curl_exec($ch);
- curl_close($ch);
-
- return $contents;
- }
-
- private static function get_info($url)
- {
- $ch = curl_init($url);
- curl_setopt_array($ch, array(
- CURLOPT_HEADER => TRUE,
- CURLOPT_NOBODY => TRUE,
- CURLOPT_FOLLOWLOCATION => TRUE, // follow http redirects to get the real URL
- CURLOPT_RETURNTRANSFER => TRUE,
- CURLOPT_SSL_VERIFYHOST => FALSE,
- CURLOPT_SSL_VERIFYPEER => FALSE,
- CURLOPT_USERAGENT => Tweeper::$USER_AGENT,
- ));
- curl_exec($ch);
- $url_info = curl_getinfo($ch);
- curl_close($ch);
-
- return $url_info;
- }
-
- public static function generate_enclosure($url)
- {
- $supported_content_types = array(
- "application/ogg",
- "audio/aac",
- "audio/mp4",
- "audio/mpeg",
- "audio/ogg",
- "audio/vorbis",
- "audio/wav",
- "audio/webm",
- "audio/x-midi",
- "image/gif",
- "image/jpeg",
- "video/avi",
- "video/mp4",
- "video/mpeg",
- "video/ogg",
- );
-
- // The RSS specification says that the enclosure element url must be http.
- // See http://sourceforge.net/p/feedvalidator/bugs/72/
- $http_url = preg_replace("/^https/", "http", $url);
-
- $url_info = Tweeper::get_info($http_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 '';
- }
-
- $dom = new DomDocument();
- $enc = $dom->createElement('enclosure');
- $enc->setAttribute('url', $url_info['url']);
- $enc->setAttribute('length', $url_info['download_content_length']);
- $enc->setAttribute('type', $url_info['content_type']);