Return Lookup

[Jaap van Arragon]

Hello Hugo,

Thank you for your answer.

It was most helpful!!

Regards,
Jaap


On 11/23/11 12:49 PM, "Hugo Cisneiros (Eitch)" <hugo.cisneiros at gmail.com>
wrote:

> On Wed, Nov 23, 2011 at 9:32 AM, Jaap van Arragon
> <j.vanarragon at lukkien.com> wrote:
>> Hello,
>> 
>> Hopefully a short question:
>> 
>> We have the following code in our VCL file:
>> 
>> sub vcl_recv {
>> 
>>     # Purge through http
>>     if (req.request == "PURGE") {
>>         if (!client.ip ~ purge) {
>>             error 405 "Not allowed.";
>>         }
>>         ban("req.url =" + req.url + "&& req.http.host =" + req.http.host);
>>         error 200 "Purged.";
>>     }
>> 
>>     if (req.http.cookie) {
>>         unset req.http.cookie;
>>         return (lookup);
>>     }
>> 
>>     if (req.http.host ~ "example.url.com") {
>>         set req.backend = live;
>>     }
>>     else {
>>         error 404 "Unkown Virtual host";
>>     }
>> 
>> When our request ( example.url.com/asdja?adn23 ) comes in we see that the
>> backend is selected which it first came across. We¹ve could pinpoint it to
>> the unset.req.http.cookie part. If we move the unset cookie part under the
>> req.http.host ~ "example.url.com" part it all goes fine.
>> 
>> Can it be that the return(lookup); in the unset req.http.cookie part skips
>> the req.http.host part? And thus the first backend is selected?
> 
> Yes. The 'return(lookup)' after the 'unset req.http.cookie' will skip
> all the rest of vcl_fetch. It will lookup in the cache and go to the
> vcl_hit or vcl_pass depending if the object is found or not.
> 
> You must place return(lookup) only after all required rules are done.
> For example, I think this would work:
> 
> if (req.http.cookie) {
>   if (req.http.host ~ "example.url.com") {
>     set req.backend = live;
>   }
>   else {
>     error 404 "Unkown Virtual host";
>   }
> 
>   unset req.http.cookie;
>   return (lookup);
> }
> 
> Hope it will help.