Trigger purge of an additional CDN

Hi there,

I have put a CDN in front of WordPress to leverage AWS WAF, Origin Shield and a few other features. To invalidate the CDN I used this function, credits to https://gist.github.com/claylo/1009169, which does its job but causes unwanted side effects during save process.

function albCdnFlush($post_ID, $new_status, $old_status)  {
	if ( $new_status === "publish" || $old_status === "publish" ) {
		$access_key = 'MYKACCESSEY';
		$secret_key = 'MYSECRETKEY';
		$distribution = 'DISTRIBUTION-ID';
		$epoch = date('U');

		$xml = <<<EOD
			<InvalidationBatch>
			<Path>/*</Path>
			<CallerReference>{$distribution}{$epoch}</CallerReference>
			</InvalidationBatch>
			EOD;

		/**
		 * You probably don't need to change anything below here.
		 */
		$len = strlen($xml);
		$date = gmdate('D, d M Y G:i:s T');
		$sig = base64_encode(
			hash_hmac('sha1', $date, $secret_key, true)
		);

		$msg = "POST /2010-11-01/distribution/{$distribution}/invalidation HTTP/1.0\r\n";
		$msg .= "Host: cloudfront.amazonaws.com\r\n";
		$msg .= "Date: {$date}\r\n";
		$msg .= "Content-Type: text/xml; charset=UTF-8\r\n";
		$msg .= "Authorization: AWS {$access_key}:{$sig}\r\n";
		$msg .= "Content-Length: {$len}\r\n\r\n";
		$msg .= $xml;

		$fp = fsockopen('ssl://cloudfront.amazonaws.com', 443, 
		 $errno, $errstr, 30
		);
		if (!$fp) {
			die("Connection failed: {$errno} {$errstr}\n");
		}
		fwrite($fp, $msg);
		$resp = '';
		while(! feof($fp)) {
			$resp .= fgets($fp, 1024);
		}
		fclose($fp);
		echo $resp;
	}
}
add_action(  'transition_post_status',  'albCdnFlush', 10, 3 );

I wonder, though, if I the existing W3Total Cache process(es) can be used but with different credentials, respectively another CDN ID?

Many thanks in advance
Mike