Added example vcl to use in front of zope+plone (this could perhaps go in a...

Added example vcl to use in front of zope+plone (this could perhaps go in a contrib/ directory instead)

git-svn-id: http://www.varnish-cache.org/svn/trunk@1427 d4fa192b-c00b-0410-8231-f00ffab90ce4

etc/zope-plone.vcl

+#
+# This is a basic VCL configuration file for varnish.  See the vcl(7)
+# man page for details on VCL syntax and semantics.
+#
+# $Id: default.vcl 1424 2007-05-15 19:38:56Z des $
+#
+
+# Default backend definition.  Set this to point to your content
+# server.
+
+backend default {
+	set backend.host = "127.0.0.1";
+	set backend.port = "9673";
+}
+
+acl purge {
+	"localhost";
+	"192.0.2.0"/24;
+}
+
+sub vcl_recv {
+	if (req.request != "GET" && req.request != "HEAD") {
+		pipe;
+	}
+	if (req.http.Expect) {
+		pipe;
+	}
+	if (req.http.Authenticate) {
+		pass;
+	}
+	# We only care about the "__ac.*" cookies, used for authentication
+	if (req.http.Cookie && req.http.Cookie ~ "__ac(|_(name|password|persistent))=") {
+		pass;
+	}
+        # PURGE request if zope asks nicely
+        if (req.request == "PURGE") {
+                if (!client.ip ~ purge) {
+                        error 405 "Not allowed.";
+                }
+                lookup;
+        }
+	lookup;
+}
+
+# Do the PURGE thing
+sub vcl_hit {
+        if (req.request == "PURGE") {
+                set obj.ttl = 0s;
+                error 200 "Purged";
+        }
+}
+sub vcl_miss {
+        if (req.request == "PURGE") {
+                error 404 "Not in cache";
+        }
+}
+
+# Enforce a minimum TTL, since we PURGE changed objects actively from Zope.
+sub vcl_fetch {
+        if (obj.ttl < 3600s) {
+                set obj.ttl = 3600s;
+        }
+}
+
+# Below is a commented-out copy of the default VCL logic.  If you
+# redefine any of these subroutines, the built-in logic will be
+# appended to your code.
+
+## Called when a client request is received
+#
+#sub vcl_recv {
+#	if (req.request != "GET" && req.request != "HEAD") {
+#		pipe;
+#	}
+#	if (req.http.Expect) {
+#		pipe;
+#	}
+#	if (req.http.Authenticate || req.http.Cookie) {
+#		pass;
+#	}
+#	lookup;
+#}
+#
+## Called when entering pipe mode
+#
+#sub vcl_pipe {
+#	pipe;
+#}
+#
+## Called when entering pass mode
+#
+#sub vcl_pass {
+#	pass;
+#}
+#
+## Called when entering an object into the cache
+#
+#sub vcl_hash {
+#	hash;
+#}
+#
+## Called when the requested object was found in the cache
+#
+#sub vcl_hit {
+#	if (!obj.cacheable) {
+#		pass;
+#	}
+#	deliver;
+#}
+#
+## Called when the requested object was not found in the cache
+#
+#sub vcl_miss {
+#	fetch;
+#}
+#
+## Called when the requested object has been retrieved from the
+## backend, or the request to the backend has failed
+#
+#sub vcl_fetch {
+#	if (!obj.valid) {
+#		error;
+#	}
+#	if (!obj.cacheable) {
+#		pass;
+#	}
+#	if (resp.http.Set-Cookie) {
+#		pass;
+#	}
+#	insert;
+#}
+#
+## Called when an object nears its expiry time
+#
+#sub vcl_timeout {
+#	discard;
+#}