Nginx cached page returning binary data(.gz file) every now and then. Works when cached folder is deleted

[Quintin Par]

Thanks. Let me try this out.

On Wed, Dec 28, 2011 at 9:18 PM, Maxim Dounin <mdounin at mdounin.ru> wrote:
> Hello!
>
> On Wed, Dec 28, 2011 at 08:44:07PM +0530, Quintin Par wrote:
>
>> I have an nginx server running as a proxy. A page from it is
>> configured to be cached and served compressed.
>> But then every now and then it serves the page as .gz file which shows
>> as up a file to be downloaded. A curl –I hit returns binary data.
>>   curl -I www.site.com/cs
>> But when I deleted the cache folder everything starts working fine.
>>   sudo rm -r /tmp/nginx/cscache/
>> What could be wrong? Can someone help?
>>
>> This is the config
>>   location = /cs {
>>   proxy_pass http://localhost:82;
>>   proxy_set_header   Host             $host;
>>   proxy_set_header   X-Real-IP        $remote_addr;
>>   proxy_ignore_headers Set-Cookie;
>>   proxy_ignore_headers Cache-Control;
>>   proxy_ignore_headers Expires;
>>   proxy_ignore_headers X-Accel-Expires;
>>   add_header X-Cache-Status $upstream_cache_status;
>>   proxy_cache             cscache;
>>   proxy_cache_bypass       $http_cs;
>>   proxy_cache_key         $request_uri;
>>   proxy_cache_valid       200 302 1d;
>>   proxy_cache_valid       404      1m;
>>   proxy_cache_use_stale   error timeout invalid_header;
>>   }
>
> Most likely your backend gzips responses (if client supports
> gzipp), and these are getting cached.
>
> Possible solutions include disabling gzipping on backend or
> clearing Accept-Encoding header on nginx side before passing
> request to backend, i.e.
>
>    proxy_set_header Accept-Encoding "";
>
> Maxim Dounin
>
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