url.purge

[Pavel Pragin]

I tried the whole example it still doesn't work.
Here is my whole vcl file:

backend default {
        set backend.host = "127.0.0.1";
        set backend.port = "9090";
}


         sub vcl_recv {
              if (req.request == "GET" && req.url ~
"\.(gif|jpg|swf|css)$") {
                lookup;
             }

             if (req.request != "GET" && req.request != "HEAD") {
                 pipe;
             }
             if (req.http.Expect) {
                 pipe;
             }
             if (req.http.Authenticate || req.http.Cookie) {
                 pass;
             }
        remove req.http.X-Forwarded-For;
        set    req.http.X-Forwarded-For = client.ip;

         }

         sub vcl_pipe {
             pipe;
         }

         sub vcl_pass {
             pass;
         }

         sub vcl_hash {
             set req.hash += req.url;
             set req.hash += req.http.host;
             hash;
         }

         sub vcl_hit {
             if (!obj.cacheable) {
                 pass;
             }
             deliver;
         }

         sub vcl_miss {
             if (req.http.user-agent ~ "spider") {
                error 503 "Not in cache";
                }
             fetch;
         }

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

         sub vcl_deliver {
             deliver;
         }

         sub vcl_timeout {
             discard;
         }
         sub vcl_discard {
             discard;
         }

acl purge {
        "localhost";
}

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

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.";
        }
}