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entrypoint.sh
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entrypoint.sh
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#!/bin/sh
if [ ! -f /etc/varnish/default.vcl ]; then
VARNISH_CACHE_SIZE="${VARNISH_CACHE_SIZE:-256m}"
[ -z "${VARNISH_BACKEND_HOST}" ] && echo "Please set VARNISH_BACKEND_HOST environment variable." && exit 1;
[ -z "${VARNISH_BACKEND_PORT}" ] && echo "Please set VARNISH_BACKEND_PORT environment variable." && exit 1;
cat > /etc/varnish/default.vcl <<EOF
vcl 4.1;
import std;
backend default {
.host = "${VARNISH_BACKEND_HOST}";
.port = "${VARNISH_BACKEND_PORT}";
}
# Add hostnames, IP addresses and subnets that are allowed to purge content
acl purge {
"localhost";
"127.0.0.1";
"::1";
"${VARNISH_BACKEND_HOST}";
}
sub vcl_recv {
# Remove empty query string parameters
# e.g.: www.example.com/index.html?
if (req.url ~ "\?$") {
set req.url = regsub(req.url, "\?$", "");
}
# Remove port number from host header
set req.http.Host = regsub(req.http.Host, ":[0-9]+", "");
# Sorts query string parameters alphabetically for cache normalization purposes
set req.url = std.querysort(req.url);
# Remove the proxy header to mitigate the httpoxy vulnerability
# See https://httpoxy.org/
unset req.http.proxy;
# Purge logic to remove objects from the cache.
# Tailored to the Proxy Cache Purge WordPress plugin
# See https://wordpress.org/plugins/varnish-http-purge/
if(req.method == "PURGE") {
if(!client.ip ~ purge) {
return(synth(405,"PURGE not allowed for this IP address"));
}
if (req.http.X-Purge-Method == "regex") {
ban("obj.http.x-url ~ " + req.url + " && obj.http.x-host == " + req.http.host);
return(synth(200, "Purged"));
}
ban("obj.http.x-url == " + req.url + " && obj.http.x-host == " + req.http.host);
return(synth(200, "Purged"));
}
# Only handle relevant HTTP request methods
if (
req.method != "GET" &&
req.method != "HEAD" &&
req.method != "PUT" &&
req.method != "POST" &&
req.method != "PATCH" &&
req.method != "TRACE" &&
req.method != "OPTIONS" &&
req.method != "DELETE"
) {
return (pipe);
}
# Remove tracking query string parameters used by analytics tools
if (req.url ~ "(\?|&)(utm_source|utm_medium|utm_campaign|utm_content|gclid|cx|ie|cof|siteurl)=") {
set req.url = regsuball(req.url, "&(utm_source|utm_medium|utm_campaign|utm_content|gclid|cx|ie|cof|siteurl)=([A-z0-9_\-\.%25]+)", "");
set req.url = regsuball(req.url, "\?(utm_source|utm_medium|utm_campaign|utm_content|gclid|cx|ie|cof|siteurl)=([A-z0-9_\-\.%25]+)", "?");
set req.url = regsub(req.url, "\?&", "?");
set req.url = regsub(req.url, "\?$", "");
}
# Only cache GET and HEAD requests
if (req.method != "GET" && req.method != "HEAD") {
set req.http.X-Cacheable = "NO:REQUEST-METHOD";
return(pass);
}
# Mark static files with the X-Static-File header, and remove any cookies
# X-Static-File is also used in vcl_backend_response to identify static files
if (req.url ~ "^[^?]*\.(7z|avi|bmp|bz2|css|csv|doc|docx|eot|flac|flv|gif|gz|ico|jpeg|jpg|js|less|mka|mkv|mov|mp3|mp4|mpeg|mpg|odt|ogg|ogm|opus|otf|pdf|png|ppt|pptx|rar|rtf|svg|svgz|swf|tar|tbz|tgz|ttf|txt|txz|wav|webm|webp|woff|woff2|xls|xlsx|xml|xz|zip)(\?.*)?$") {
set req.http.X-Static-File = "true";
unset req.http.Cookie;
return(hash);
}
# No caching of special URLs, logged in users and some plugins
if (
req.http.Cookie ~ "wordpress_(?!test_)[a-zA-Z0-9_]+|wp-postpass|comment_author_[a-zA-Z0-9_]+|woocommerce_cart_hash|woocommerce_items_in_cart|wp_woocommerce_session_[a-zA-Z0-9]+|wordpress_logged_in_|comment_author|PHPSESSID" ||
req.http.Authorization ||
req.url ~ "add_to_cart" ||
req.url ~ "edd_action" ||
req.url ~ "nocache" ||
req.url ~ "^/addons" ||
req.url ~ "^/bb-admin" ||
req.url ~ "^/bb-login.php" ||
req.url ~ "^/bb-reset-password.php" ||
req.url ~ "^/cart" ||
req.url ~ "^/checkout" ||
req.url ~ "^/control.php" ||
req.url ~ "^/login" ||
req.url ~ "^/logout" ||
req.url ~ "^/lost-password" ||
req.url ~ "^/my-account" ||
req.url ~ "^/product" ||
req.url ~ "^/register" ||
req.url ~ "^/register.php" ||
req.url ~ "^/server-status" ||
req.url ~ "^/signin" ||
req.url ~ "^/signup" ||
req.url ~ "^/stats" ||
req.url ~ "^/wc-api" ||
req.url ~ "^/wp-admin" ||
req.url ~ "^/wp-comments-post.php" ||
req.url ~ "^/wp-cron.php" ||
req.url ~ "^/wp-login.php" ||
req.url ~ "^/wp-activate.php" ||
req.url ~ "^/wp-mail.php" ||
req.url ~ "^/wp-login.php" ||
req.url ~ "^\?add-to-cart=" ||
req.url ~ "^\?wc-api=" ||
req.url ~ "^/preview=" ||
req.url ~ "^/\.well-known/acme-challenge/"
) {
set req.http.X-Cacheable = "NO:Logged in/Got Sessions";
if(req.http.X-Requested-With == "XMLHttpRequest") {
set req.http.X-Cacheable = "NO:Ajax";
}
return(pass);
}
# Remove any cookies left
unset req.http.Cookie;
return(hash);
}
sub vcl_hash {
if(req.http.X-Forwarded-Proto) {
# Create cache variations depending on the request protocol
hash_data(req.http.X-Forwarded-Proto);
}
}
sub vcl_backend_response {
# Inject URL & Host header into the object for asynchronous banning purposes
set beresp.http.x-url = bereq.url;
set beresp.http.x-host = bereq.http.host;
# If we dont get a Cache-Control header from the backend
# we default to 1h cache for all objects
if (!beresp.http.Cache-Control) {
set beresp.ttl = 1h;
set beresp.http.X-Cacheable = "YES:Forced";
}
# If the file is marked as static we cache it for 1 day
if (bereq.http.X-Static-File == "true") {
unset beresp.http.Set-Cookie;
set beresp.http.X-Cacheable = "YES:Forced";
set beresp.ttl = 1d;
}
# Remove the Set-Cookie header when a specific Wordfence cookie is set
if (beresp.http.Set-Cookie ~ "wfvt_|wordfence_verifiedHuman") {
unset beresp.http.Set-Cookie;
}
if (beresp.http.Set-Cookie) {
set beresp.http.X-Cacheable = "NO:Got Cookies";
} elseif(beresp.http.Cache-Control ~ "private") {
set beresp.http.X-Cacheable = "NO:Cache-Control=private";
}
}
sub vcl_deliver {
# Debug header
if(req.http.X-Cacheable) {
set resp.http.X-Cacheable = req.http.X-Cacheable;
} elseif(obj.uncacheable) {
if(!resp.http.X-Cacheable) {
set resp.http.X-Cacheable = "NO:UNCACHEABLE";
}
} elseif(!resp.http.X-Cacheable) {
set resp.http.X-Cacheable = "YES";
}
# Cleanup of headers
unset resp.http.x-url;
unset resp.http.x-host;
}
EOF
fi
exec varnishd -F -f /etc/varnish/default.vcl -s malloc,${VARNISH_CACHE_SIZE} -a 0.0.0.0:8080