Varnish Purge - Ban, custom hash

[Dridi Boukelmoune]

Hi,

Have you solved your issue ?
I haven't looked closely at the VCL yet but maybe I could help.

Dridi

On Mon, Oct 28, 2013 at 8:34 PM, Lane, Richard <rlane at ahbelo.com> wrote:
> I am using multiple hash_data calls to customize the hash key. I need to
> cache potentially three different version of  the page.
>
> My problem is how do I purge the items. I have tried implementing purge; in
> recv, hit, miss functions like Varnish docs show but still not working.
>
> I have tried implementing ban using a regex or == on the URL.
>
> Below is my VCL hash function. How do I purge a URL that is hashed with
> key...
>
> "/mysection/mystory.htmlwww.example.com_preview_mobile"
>
> I had this working prior to Varnish 3 but seems to have stopped working
> after that.
>
> ##VCL Hash function below
>
> vcl_hash {
>
>     hash_data(req.url);
>     if (req.http.host) {
>         hash_data(req.http.host);
>     } else {
>         hash_data(server.ip);
>     }
>
>     #if(req.http.Accept-Encoding) {
>     #    set req.hash += req.http.Accept-Encoding;
>     #}
>
>     ## /* Normalize Accept-Encoding to reduce effects of Vary:
> Accept-Encoding
>     ## (cf. http://varnish-cache.org/wiki/FAQ/Compression)
>     ## Also note that Vary: User-Agent is considered harmful */
>     if (req.http.Accept-Encoding) {
>        if (req.url ~ "\.(jpg|png|gif|gz|tgz|bz2|tbz|mp3|ogg)$") {
>          // Don't compress already-compressed files
>          remove req.http.Accept-Encoding;
>        }
>        elsif (req.http.Accept-Encoding ~ "gzip") {
>          set req.http.Accept-Encoding = "gzip";
>        }
>        elsif (req.http.Accept-Encoding ~ "deflate") {
>          set req.http.Accept-Encoding = "deflate";
>        }
>        else {
>          // unknown algorithm
>          remove req.http.Accept-Encoding;
>        }
>     }
>
>     if(req.http.x-preview == "yes" && (req.url ~ ".shtml"  || req.url ~
> ".html") )
>     {
>         hash_data("_preview");
>         ##Add device view to hash
>         hash_data("_" + req.http.x-preferred-device);
>
>     }else{
>
>         ##Add device view to hash
>         hash_data("_" + req.http.x-device);
>     }
>     return (hash);
> }
>
> #Purge pieces
> vcl_recv {
>
>     if (req.request == "PURGE") {
>                 if (!client.ip ~ localaddr) {
>                     error 405 "Method not allowed";
>                 }
>               ban("obj.http.x-url ~ " + req.url + " && obj.http.x-host == "
> + req.http.host + " && obj.http.x-pd ~ .*" );
>               std.log("Purge : yes really purge.");
>               return(lookup);
>          }
>
> vcl_hit {
>         if (req.request == "PURGE") {
>                 purge;
>                 error 200 "Purged.";
>         }
> }
>
> vcl_miss {
>         if (req.request == "PURGE") {
>                 purge;
>                 error 200 "Purged.";
>         }
>
>  vcl_fetch {
>       #setup for banning
>      set beresp.http.x-url = req.url;
>      set beresp.http.x-host = req.http.host;
>      set beresp.http.x-pd = req.http.x-device;
>
>   }
>
>  vcl_deliver {
>    #Clean up banning
>     unset resp.http.x-url;
>     unset resp.http.x-host;
>     unset resp.http.x-pd;
>
>  }
>
> Thanks in advance,
>
> Richard
>
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