proxy_pass and $content_type

[Igor Sysoev]

On Tue, Sep 15, 2009 at 01:40:06PM +0200, Cedric Jeanneret wrote:

> Hello all,
> 
> We're wanting to use nginx as a proxy between a varnish and a S3 storage. We're using debian lenny, nginx version is 0.6.32-3.
> 
> What we're dowing:
> 
> server {
>   location / {
>     proxy_pass ...
>     if ($content_type !~* "image/") {
>       return 403
>     }
>   }
> }
> 
> What happens ? well, 403 for all. We put in log "$content_type", and saw it's set to "-".
> 
> Is it normal? Is there another way to filter by content type?
> Our final goal is:
> S3 sends either the file if it can find it, or an XML (so a content_type "text/xml" or smth like that). We don't want to give the xml, as it contains S3 bucket name...
> 
> If any of you has an idea/fixe/workaround...

You should use 0.7.62, because
1) it can cache content instead of varnish,
2) it has image_filter, that tests that response has valid GIF, PNG, JPEG:

     location / {
         proxy_pass    ...
         image_filter  test;
         error_page    415  =403  /403.html;
     }

     location /403.html {
         root  path/to/page;
     }


-- 
Igor Sysoev
http://sysoev.ru/en/