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Varnish 4 VCL configuration for WordPress. Also allows purging
#
# This is an example VCL file for Varnish.
#
# It does not do anything by default, delegating control to the
# builtin VCL. The builtin VCL is called when there is no explicit
# return statement.
#
# See the VCL chapters in the Users Guide at https://www.varnish-cache.org/docs/
# and http://varnish-cache.org/trac/wiki/VCLExamples for more examples.
# Marker to tell the VCL compiler that this VCL has been adapted to the
# new 4.0 format.
vcl 4.0;
import directors;
# Default backend definition. Set this to point to your content server.
backend default {
.host = "127.0.0.1";
.port = "8008";
}
acl purge {
"localhost";
"127.0.0.1";
}
sub vcl_recv {
set req.http.X-Forwarded-For = client.ip;
set req.backend_hint= default;
set req.http.X-Forwarded-Proto = "https";
unset req.http.Accept-Language;
unset req.http.User-Agent;
if (req.method == "PURGE") {
if (!client.ip ~ purge) {
return(synth(405,"Not allowed."));
}
return (purge);
}
if (req.url ~ "\.(gif|jpg|jpeg|swf|ttf|css|js|flv|mp3|mp4|pdf|ico|png)(\?.*|)$") {
unset req.http.cookie;
set req.url = regsub(req.url, "\?.*$", "");
}
if (req.url ~ "\?(utm_(campaign|medium|source|term)|adParams|client|cx|eid|fbid|feed|ref(id|src)?|v(er|iew))=") {
set req.url = regsub(req.url, "\?.*$", "");
}
if (req.url ~ "wp-(login|admin)" || req.url ~ "preview=true" || req.url ~ "xmlrpc.php") {
return (pass);
}
if (req.http.cookie) {
if (req.http.cookie ~ "(wordpress_|wp-settings-)") {
return(pass);
} else {
unset req.http.cookie;
}
}
}
# Drop any cookies Wordpress tries to send back to the client.
sub vcl_backend_response {
if (bereq.http.Cookie ~ "(UserID|_session)") {
set beresp.http.X-Cacheable = "NO:Got Session";
set beresp.uncacheable = true;
return (deliver);
} elsif (beresp.ttl <= 0s) {
# Varnish determined the object was not cacheable
set beresp.http.X-Cacheable = "NO:Not Cacheable";
} elsif (beresp.http.set-cookie) {
# You don't wish to cache content for logged in users
set beresp.http.X-Cacheable = "NO:Set-Cookie";
set beresp.uncacheable = true;
return (deliver);
} elsif (beresp.http.Cache-Control ~ "private") {
# You are respecting the Cache-Control=private header from the backend
set beresp.http.X-Cacheable = "NO:Cache-Control=private";
set beresp.uncacheable = true;
return (deliver);
} else {
# Varnish determined the object was cacheable
set beresp.http.X-Cacheable = "YES";
}
if ( (!(bereq.url ~ "(wp-(login|admin)|login)")) || (bereq.method == "GET") ) {
unset beresp.http.set-cookie;
set beresp.ttl = 1h;
}
if (bereq.url ~ "\.(gif|jpg|jpeg|swf|ttf|css|js|flv|mp3|mp4|pdf|ico|png)(\?.*|)$") {
set beresp.ttl = 365d;
}
}
sub vcl_hash {
if ( req.http.X-Forwarded-Proto ) {
hash_data( req.http.X-Forwarded-Proto );
}
}
sub vcl_deliver {
if (obj.hits > 0) {
set resp.http.X-Cache = "HIT";
} else {
set resp.http.X-Cache = "MISS";
}
set resp.http.Access-Control-Allow-Origin = "*";
}
sub vcl_hit {
if (req.method == "PURGE") {
return(synth(200,"OK"));
}
}
sub vcl_miss {
if (req.method == "PURGE") {
return(synth(404,"Not cached"));
}
}
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