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vcl 4.0;
import directors;
import std;
# Assumed 'wordpress' host, this can be docker servicename
backend default {
.host = "wordpress-site";
.port = "80";
}
acl purge {
"localhost";
"127.0.0.1";
}
sub vcl_recv {
# Only a single backend
set req.backend_hint= default;
# Setting http headers for backend
set req.http.X-Forwarded-For = client.ip;
set req.http.X-Forwarded-Proto = "https";
# Unset headers that might cause us to cache duplicate infos
unset req.http.Accept-Language;
unset req.http.User-Agent;
# The purge...no idea if this works
if (req.method == "PURGE") {
if (!client.ip ~ purge) {
return(synth(405,"Not allowed."));
}
return (purge);
}
if ( std.port(server.ip) == 6080) {
set req.http.x-redir = "https://" + req.http.host + req.url;
return (synth(750, "Moved permanently"));
}
# drop cookies and params from static assets
if (req.url ~ "\.(gif|jpg|jpeg|swf|ttf|css|js|flv|mp3|mp4|pdf|ico|png)(\?.*|)$") {
unset req.http.cookie;
set req.url = regsub(req.url, "\?.*$", "");
}
# drop tracking params
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, "\?.*$", "");
}
# pass wp-admin urls
if (req.url ~ "(wp-login|wp-admin)" || req.url ~ "preview=true" || req.url ~ "xmlrpc.php") {
return (pass);
}
# pass wp-admin cookies
if (req.http.cookie) {
if (req.http.cookie ~ "(wordpress_|wp-settings-)") {
return(pass);
} else {
unset req.http.cookie;
}
}
}
sub vcl_backend_response {
# retry a few times if backend is down
if (beresp.status == 503 && bereq.retries < 3 ) {
return(retry);
}
if (bereq.http.Cookie ~ "(UserID|_session)") {
# if we get a session cookie...caching is a no-go
set beresp.http.X-Cacheable = "NO:Got Session";
set beresp.uncacheable = true;
return (deliver);
} elsif (beresp.ttl <= 0s) {
# Varnish determined the object was not cacheable
set beresp.http.X-Cacheable = "NO:Not Cacheable";
} elsif (beresp.http.set-cookie) {
# You don't wish to cache content for logged in users
set beresp.http.X-Cacheable = "NO:Set-Cookie";
set beresp.uncacheable = true;
return (deliver);
} elsif (beresp.http.Cache-Control ~ "private") {
# You are respecting the Cache-Control=private header from the backend
set beresp.http.X-Cacheable = "NO:Cache-Control=private";
set beresp.uncacheable = true;
return (deliver);
} else {
# Varnish determined the object was cacheable
set beresp.http.X-Cacheable = "YES";
# Remove Expires from backend, it's not long enough
unset beresp.http.expires;
# Set the clients TTL on this object
set beresp.http.cache-control = "max-age=900";
# Set how long Varnish will keep it
set beresp.ttl = 1w;
# marker for vcl_deliver to reset Age:
set beresp.http.magicmarker = "1";
}
# unset cookies from backendresponse
if (!(bereq.url ~ "(wp-login|wp-admin)")) {
set beresp.http.X-UnsetCookies = "TRUE";
unset beresp.http.set-cookie;
set beresp.ttl = 1h;
}
# long ttl for assets
if (bereq.url ~ "\.(gif|jpg|jpeg|swf|ttf|css|js|flv|mp3|mp4|pdf|ico|png)(\?.*|)$") {
set beresp.ttl = 365d;
}
set beresp.grace = 1w;
}
sub vcl_hash {
if ( req.http.X-Forwarded-Proto ) {
hash_data( req.http.X-Forwarded-Proto );
}
}
sub vcl_backend_error {
# display custom error page if backend down
if (beresp.status == 503 && bereq.retries == 3) {
synthetic(std.fileread("/etc/varnish/error503.html"));
return(deliver);
}
}
sub vcl_synth {
# redirect for http
if (resp.status == 750) {
set resp.status = 301;
set resp.http.Location = req.http.x-redir;
return(deliver);
}
# display custom error page if backend down
if (resp.status == 503) {
synthetic(std.fileread("/etc/varnish/error503.html"));
return(deliver);
}
}
sub vcl_deliver {
# oh noes backend is down
if (resp.status == 503) {
return(restart);
}
if (resp.http.magicmarker) {
# Remove the magic marker
unset resp.http.magicmarker;
# By definition we have a fresh object
set resp.http.age = "0";
}
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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