darkhelmet · October 29, 2010 20:21 · Oct 29, 2010
diff --git a/heroku.vcl b/heroku.vcl
@@ -0,0 +1,60 @@
+director routing_mesh round-robin {
+	{
+		.backend = {
+			.host = "...some ip...";
+			.port = "...some port...";
+			.first_byte_timeout = 90s;
+			.between_bytes_timeout = 90s;
+		}
+		# ...more backends...
+	}
+}
+
+sub vcl_recv {
+	set req.backend = routing_mesh;
+
+	# POST, PUT, and DELETE are not cached
+	if (req.request != "GET" && req.request != "HEAD") {
+		return (pass);
+	}
+
+	# never cache when http basic auth is used
+	if (req.http.Authorization) {
+		return (pass);
+	}
+
+	# serve stale items for 30 seconds while fetching new item from backend
+	set req.grace = 30s;
+
+	return (lookup);
+}
+
+sub vcl_fetch {
+	# cache 200s set to cache public
+	if (obj.cacheable && obj.http.Cache-Control ~ "public") {
+		set obj.prefetch = -30s;
+		unset obj.http.set-cookie;
+		return (deliver);
+	}
+
+	# everything else is served dynamically
+	return (pass);
+}
+
+
+sub vcl_error {
+	set obj.http.Content-Type = "text/html; charset=utf-8";
+	synthetic {"...error page html..."};
+	return (deliver);
+}
+
+# Disable keep-alive support with backends
+sub vcl_miss {
+	set bereq.http.Connection = "close";
+}
+sub vcl_pass {
+	set bereq.http.Connection = "close";
+}
+sub vcl_pipe {
+	set bereq.http.Connection = "close";
+}