varnishd 4.0 -- default.vcl WordPress caching

# 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";
    }
}