We've recently started delivering image urls with query strings for cropping, like

http://images-camping.info/CampsiteImages/116914_Large.jpg?width=453&height=302&mode=crop

We've also successfully been using the NGINX cache for our images *before* adding the query strings.

Unfortunately, with the query strings added, caching does not work anymore and all requests to above URL are passed to the upstream server. You can see this by inspecting the HTTP response headers for above url: X-Cache-Status is always MISS.

Can anybody point to me to the necessary pieces of information to get caching for resources with query strings to work?

Oliver
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