proxy_cache_bypass and proxy_no_cache

[Antonio P.P. Almeida]

> One interesting observation
>
> I put this code
>
>         location /test {
>             proxy_pass http://a/;
>             ....
>             set $dont_cache 1;
>
>             if ( $cookie_route ) {
>                      set $dont_cache 0;
>             }
>             proxy_cache_bypass    $dont_cache;
>             proxy_no_cache        $dont_cache;
>
>         }
>
> and it started to dis-honour the trailing slash http://a/ With the end /
> it
> does not look for /test but only due to the if block it started to look
> for
> it.

You have to set it at the server level to make it work.

set $dont_cache 1;

if ($cookie_route) {
  set $dont_cache 0;
}

location /test {
   proxy_pass http://a/;
   proxy_cache_bypass $dont_cache;
   proxy_no_cache $dont_cache;
}

If creates an implicit location.

If is evil: http://wiki.nginx.org/IfIsEvil

As Igor said above use map and get clear of the if directive quirks.

--appa