Hi,

My application is mainly just delivering images. Each image exists for a
minimum size of 800x600 pixel on disk. When a thumbnail is requested for
the first time, this file does not exist. So my action controller should
check if the current url is a request for a thumbnail version of an
image. It should generate the thumbnail, save and deliver it. All
subsequent calls for this file should just deliver the image from disk.
If a request is not for a thumbnail version (a real 404) then the normal
404 page should be delivered and the 404 status code should be sent.

What is the best approach for this scenario?

Regards,

Ralf

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