mingshun / varnish-helper

Varnish helper for WordPress in purge and ESI.

Varnish helper for WordPress in purge and ESI.

To get the PURGE and BAN request worked, you should config your Varnish correctly. Take Varnish 3 as an example:

acl purge {
	"127.0.0.1";
}

sub vcl_recv {
	...
	if(req.request == "PURGE") {
		if (client.ip !~ purge) {
			error 405 "Not allowed";
		}
		return (looktup);
	}

	if (req.request == "BAN") {
		if (client.ip !~ purge) {
			error 405 "Not allowed";
		} else {
			ban("req.http.host == " + req.http.Host + " && req.url ~ ^" + req.url);
			error 200 "Banned";
		}
	}
	...
}

sub vcl_hit {
	if (req.request == "PURGE") {
		purge;
		error 200 "Purged";
	}
	return (deliver);
}

sub vcl_miss {
	if (req.request == "PURGE") {
		purge;
		error 200 "Not in cache";
	}
	return (fetch);
}

For security, limit the IPs that can be only requested PURGE and BAN.

To enable Edge Side Includes, you should do in vcl_fetch:

if (beresp.http.Content-Type ~ "html") {
	set beresp.do_esi = true;
}