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vcl 4.0;
import std;
backend default {
.host = "127.0.0.1";
.port = "4000";
}
# ACL for IPs that are allowed to PURGE data from the cache
acl purge {
"127.0.0.1";
}
sub vcl_recv {
# Redirect HTTP to HTTPS
if (std.port(server.ip) != 443) {
set req.http.x-redir = "https://" + req.http.host + req.url;
return (synth(750, ""));
}
# Pipe if WebSockets request is coming through
if (req.http.upgrade ~ "(?i)websocket") {
return (pipe);
}
# Allow purging of the cache
if (req.method == "PURGE") {
if (!client.ip ~ purge) {
return(synth(405,"Not allowed."));
}
return(purge);
}
# Pleroma MediaProxy - strip headers that will affect caching
if (req.url ~ "^/proxy/") {
unset req.http.Cookie;
unset req.http.Authorization;
unset req.http.Accept;
return (hash);
}
# Strip headers that will affect caching from all other static content
# This also permits caching of individual toots and AP Activities
if ((req.url ~ "^/(media|static)/") ||
(req.url ~ "(?i)\.(html|js|css|jpg|jpeg|png|gif|gz|tgz|bz2|tbz|mp3|ogg|svg|swf|ttf|pdf|woff|woff2)$"))
{
unset req.http.Cookie;
unset req.http.Authorization;
return (hash);
}
# Everything else should just be piped to Pleroma
return (pipe);
}
sub vcl_backend_response {
# gzip text content
if (beresp.http.content-type ~ "(text|text/css|application/x-javascript|application/javascript)") {
set beresp.do_gzip = true;
}
# etags are bad
unset beresp.http.etag;
# Don't cache objects that require authentication
if (beresp.http.Authorization && !beresp.http.Cache-Control ~ "public") {
set beresp.uncacheable = true;
return (deliver);
}
# Default object caching of 86400s;
set beresp.ttl = 86400s;
# Allow serving cached content for 6h in case backend goes down
set beresp.grace = 6h;
# Do not cache 5xx responses
if (beresp.status == 500 || beresp.status == 502 || beresp.status == 503 || beresp.status == 504) {
set beresp.uncacheable = true;
return (abandon);
}
# Do not cache redirects and errors
if ((beresp.status >= 300) && (beresp.status < 500)) {
set beresp.uncacheable = true;
set beresp.ttl = 30s;
return (deliver);
}
# Pleroma MediaProxy internally sets headers properly
if (bereq.url ~ "^/proxy/") {
return (deliver);
}
# Strip cache-restricting headers from Pleroma on static content that we want to cache
# Also enable streaming of cached content to clients (no waiting for Varnish to complete backend fetch)
if (bereq.url ~ "(?i)\.(js|css|jpg|jpeg|png|gif|gz|tgz|bz2|tbz|mp3|ogg|svg|swf|ttf|pdf|woff|woff2)$")
{
unset beresp.http.set-cookie;
unset beresp.http.Cache-Control;
unset beresp.http.x-request-id;
set beresp.http.Cache-Control = "public, max-age=86400";
set beresp.do_stream = true;
}
}
# The synthetic response for 301 redirects
sub vcl_synth {
if (resp.status == 750) {
set resp.status = 301;
set resp.http.Location = req.http.x-redir;
return(deliver);
}
}
# Ensure WebSockets through the pipe do not close prematurely
sub vcl_pipe {
if (req.http.upgrade) {
set bereq.http.upgrade = req.http.upgrade;
set bereq.http.connection = req.http.connection;
}
}
sub vcl_deliver {
set resp.http.X-Frame-Options = "DENY";
set resp.http.X-XSS-Protection = "1; mode=block";
set resp.http.X-Content-Type-Options = "nosniff";
set resp.http.Referrer-Policy = "same-origin";
set resp.http.Content-Security-Policy = "default-src 'none'; base-uri 'self'; form-action 'self'; img-src 'self' data: https:; media-src 'self' https:; style-src 'self' 'unsafe-inline'; font-src 'self'; script-src 'self'; connect-src 'self' wss://" + req.http.host + "; upgrade-insecure-requests;";
# Uncomment this only after you get HTTPS working.
# set resp.http.Strict-Transport-Security= "max-age=31536000; includeSubDomains";
}
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