# Varnish configuration for wordpress
# AdminGeekZ Ltd <sales@admingeekz.com>
# URL: www.admingeekz.com/varnish-wordpress
# Version: 1.5
## updated -> Brad Tarver
## updated -> for Varnish 4.0 syntax

vcl 4.0;

backend default {
	.host = "127.0.0.1";
	.port = "8080";
}

#Which hosts are allowed to PURGE the cache
acl purge {
	"172.31.27.119";
}


sub vcl_recv {

	if (req.method == "BAN") {
		if(!client.ip ~ purge) {
			return (synth(405, "Not allowed."));
		}
		ban("req.url ~ "+req.url+" && req.http.host == "+req.http.host);
		return (synth(200, "Banned."));
	}

	if (req.method != "GET" &&
		req.method != "HEAD" &&
		req.method != "PUT" &&
		req.method != "POST" &&
		req.method != "TRACE" &&
		req.method != "OPTIONS" &&
		req.method != "DELETE") {
		return (pipe);
	}


	if (req.method != "GET" && req.method != "HEAD") {
		return (pass);
	}

	#Don't cache admin or login pages
	if (req.url ~ "wp-(login|admin)" ||
		req.url ~ "preview=true" ||
		req.url ~ "contact-form") {
		return (pass);
	}

	#Don't cache logged in users
	if (req.http.Cookie && req.http.Cookie ~ "(wordpress_|wordpress_logged_in|comment_author_)") {
		return(pass);
	}

	#Don't cache ajax requests, urls with ?nocache or comments/login/regiser
	if(req.http.X-Requested-With == "XMLHttpRequest" || req.url ~ "nocache" || req.url ~ "(control.php|wp-comments-post.php|wp-login.php|register.php)") {
		return (pass);
	}

	if (req.http.host == "(www.)oncallnetworks.net") {
		set req.backend_hint = default;
	}
	if (req.http.host == "(www.)liveoakpsych.com") {
		set req.backend_hint = default;
	}
	if (req.http.host == "(www.)brandonfc.com") {
		set req.backend_hint = default;
	}
	if (req.http.host == "(www.)adaptingtechnologies.com") {
		set req.backend_hint = default;
	}
	if (req.http.host == "(www.)stalexisjackson.org") {
		set req.backend_hint = default;
	}
	if (req.http.host == "(www.)lugoj.org") {
		set req.backend_hint = default;
	}
	if (req.http.host == "(www.)berial.org") {
		set req.backend_hint = default;
	}
	# redirect berial.info/.net to .org using vcl_synth
	if ( (req.http.host ~ "^(?i)www.berial.net" || req.http.host ~ "^(?i)berial.net" || req.http.host ~ "^(?i)www.berial.info" || req.http.host ~ "^(?i)berial.info") ) {
		return (synth(750, ""));
	}
	if (req.http.host == "mlg.oncallnetworks.net" ) {
		set req.backend_hint = default;
	}
	if (req.http.host == "(www.)idl[e3]mind.net" ) {
		set req.backend_hint = default;
	}
	if (req.http.host == "(www.)badmojobrew\bery|ing|ingco\b.com" ) {
		set req.backend_hint = default;
	}

	#Serve stale cache objects for up to 2 minutes if the backend is down
	set req.http.grace = 120;

	#Remove all cookies if none of the above match
	unset req.http.cookie;

	return (hash);

}

sub vcl_synth {
	if (resp.status == 750) {
		set resp.status = 301;
		# redirect berial.info/.net to .org
		set resp.http.Location = "http://www.berial.org" + req.url;
		return(deliver);
	}
}


sub vcl_backend_response {
	#Don't cache error pages
	if (beresp.status >= 400) {
		set beresp.ttl = 0m;
		return(deliver);
	}

	if (bereq.url ~ "wp-(login|admin)" ||
		bereq.url ~ "preview=true" ||
		bereq.url ~ "contact-form") {
		set beresp.uncacheable = true;
		set beresp.ttl = 120s;
		return (deliver);
	}

	if (bereq.http.Cookie ~"(wp-postpass|wordpress_logged_in|comment_author_)") {
		set beresp.uncacheable = true;
		set beresp.ttl = 120s;
		return (deliver);
	}

	#Set the default cache time of 12 hours
	set beresp.ttl = 12h;
	return (deliver);
}

sub vcl_hash {

	#Uncomment if you use multiple domains/subdomains and want to maintain separate caches
	#hash_data(req.http.host);
	#Uncomment if you use SSL and want to maintain separate caches
	#hash_data(req.http.X-Forwarded-Port);

	#Set the hash to include the cookie if it exists, to maintain per user cache
	if ( req.http.Cookie ~"(wp-postpass|wordpress_logged_in|comment_author_)" ) {
		hash_data(req.http.Cookie);
	}
}


#Comment this out if you don't want to see whether there was a HIT or MISS in the headers
sub vcl_deliver {
	if (obj.hits > 0) {
		set resp.http.X-Cache = "HIT";
	} else {
		set resp.http.X-Cache = "MISS";
	}
}