This code is a fix which retries up to ten times to retrieve Google Calendar in the gcalendar-wrapper.php script.

gcalendar-wrapper fix

/**
 * Retrieve calendar embedding code
 */

$calRaw = '';
if (in_array('curl', get_loaded_extensions())) {
	 //counter for retry attempts
	 $i = 1;
	//Let's act like a request has been made and returned error 302 so we process first attempt
	 $status['http_code'] = '302';
	// Retry as long as 302 error returned but limit it to 10 total tries
	while (($status['http_code'] == '302') AND ($i <= 10)) {
		$curlObj = curl_init();
		curl_setopt($curlObj, CURLOPT_URL, $calUrl);
		curl_setopt($curlObj, CURLOPT_RETURNTRANSFER, 1);
		if (function_exists('curl_version')) {
			$curlVer = curl_version();
			if (is_array($curlVer) && !empty($curlVer['version']) &&
				version_compare($curlVer['version'], '7.15.2', '>=') &&
				!ini_get('open_basedir') && !ini_get('safe_mode')) {
				// enable HTTP redirect following for cURL:
				// - CURLOPT_FOLLOWLOCATION is disabled when PHP is in safe mode
				// - cURL versions before 7.15.2 had a bug that lumped
				//   redirected page content with HTTP headers
				// http://simplepie.org/support/viewtopic.php?id=1004
				curl_setopt($curlObj, CURLOPT_FOLLOWLOCATION, 1);
				curl_setopt($curlObj, CURLOPT_MAXREDIRS, 5);
			}
		
			//Get http_code from response
			$calRaw = curl_exec($curlObj);
			$status = curl_getinfo($curlObj);
			curl_close($curlObj);
		}
	}

} else if (ini_get('allow_url_fopen')) {
	// fopen should follow HTTP redirects in recent versions
	//counter for retry attempts
	$i = 1;
	//Let's act like a request has been made and returned error 302 so we process first attempt
	$meta[0] = 'HTTP/1.0 302 Moved Temporarily';
	// Retry as long as 302 error returned but limit it to 10 total tries
	while (($meta[0] == 'HTTP/1.0 302 Moved Temporarily') AND ($i <= 10)) {
		$fp = fopen($calUrl, 'r');
		while (!feof($fp)) {
			$calRaw .= fread($fp, 8192);
		}
		//Get response
		$meta = stream_get_meta_data($fp);
		fclose($fp);
	}
	
} else {
	trigger_error("Can't use cURL or fopen to retrieve Google Calendar", E_USER_ERROR);
}