91 lines
2.1 KiB
Plaintext
91 lines
2.1 KiB
Plaintext
vcl 4.1;
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# Minimal, safe Varnish config for a Next.js-style app.
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# - Cache static assets aggressively
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# - Avoid caching HTML/auth/api by default
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# - Preserve websockets / upgrade
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backend default {
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.host = "app";
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.port = "3000";
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}
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sub vcl_recv {
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# Health endpoint should always work.
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if (req.url == "/health") {
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return (pass);
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}
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# Websocket / Upgrade should not be cached.
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if (req.http.Upgrade ~ "(?i)websocket") {
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return (pipe);
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}
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# Only cache GET/HEAD.
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if (req.method != "GET" && req.method != "HEAD") {
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return (pass);
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}
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# If cookies are present, do not cache (safe default).
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if (req.http.Cookie) {
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return (pass);
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}
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# Never cache Next.js data requests (often personalized) unless you explicitly want to.
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if (req.url ~ "^/_next/data/") {
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return (pass);
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}
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# Cache immutable build assets.
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if (req.url ~ "^/_next/static/") {
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unset req.http.Cookie;
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return (hash);
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}
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# Cache common static files.
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if (req.url ~ "\.(?:css|js|mjs|map|png|jpg|jpeg|gif|webp|svg|ico|woff2?|ttf|otf)$") {
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unset req.http.Cookie;
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return (hash);
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}
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# Default: don't cache HTML.
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return (pass);
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}
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sub vcl_backend_response {
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# Cache immutable Next build assets for a long time.
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if (bereq.url ~ "^/_next/static/") {
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set beresp.ttl = 365d;
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set beresp.grace = 1h;
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set beresp.http.Cache-Control = "public, max-age=31536000, immutable";
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unset beresp.http.Set-Cookie;
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return (deliver);
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}
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# Cache static files for 7 days (safe default).
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if (bereq.url ~ "\.(?:css|js|mjs|map|png|jpg|jpeg|gif|webp|svg|ico|woff2?|ttf|otf)$") {
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set beresp.ttl = 7d;
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set beresp.grace = 1h;
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if (!beresp.http.Cache-Control) {
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set beresp.http.Cache-Control = "public, max-age=604800";
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}
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unset beresp.http.Set-Cookie;
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return (deliver);
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}
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# Everything else: don't cache by default.
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set beresp.ttl = 0s;
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set beresp.uncacheable = true;
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return (deliver);
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}
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sub vcl_deliver {
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# Helpful debug header; remove if you don't want this visible.
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if (obj.hits > 0) {
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set resp.http.X-Cache = "HIT";
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} else {
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set resp.http.X-Cache = "MISS";
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}
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}
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