plone.vcl

# This is a basic VCL configuration file for varnish.  See the vcl(7)
# man page for details on VCL syntax and semantics.

# Default backend definition.  Set this to point to your content server.

backend default {
    set backend.host = "127.0.0.1";
    set backend.port = "8090";
}

acl purge {
    "localhost";
}

sub vcl_recv {

    if (req.request == "PURGE") {
        if (!client.ip ~ purge) {
                error 405 "Not allowed.";
        }
        lookup;
    }

    if (req.request != "GET" && req.request != "HEAD") {
        pipe;
    }
   
    if (req.http.Expect) {
        pipe;
    }

    if (req.http.If-None-Match) {
        pass;
    }

    /* Do not cache other authorised content */
    if (req.http.Authenticate || req.http.Authorization) {
        pass;
    }
   
    /* We only care about the "__ac.*" cookies, used for authentication */
    if (req.http.Cookie && (req.http.Cookie ~ "__ac(_(name|password|persistent))?=" || req.http.Cookie ~ "_ZopeId")) {
        pass;
    }

    lookup;
}

/* Deal with purge requests */
sub vcl_hit {
    if (req.request == "PURGE") {
            set obj.ttl = 0s;
            error 200 "Purged";
    }
    deliver;
}

sub vcl_miss {
    if (req.http.If-Modified-Since) {
        pass;
    }
    if (req.request == "PURGE") {
            error 404 "Not in cache";
    }
    fetch;
}

sub vcl_fetch {
    if (!obj.valid) {
        error;
    }
    if (!obj.cacheable) {
        pass;
    }
    if (obj.http.Set-Cookie) {
        pass;
    }
    insert;
}