Assuming you have a route as following:
`/thumbs/:x-:y-:name.png`
and this route leads to a controller like following (pseudo-code):
class MyController extends AbstractActionController {
public function indexAction() {
if (!file_exists($name)) { // lots of validation rules here! You're
exposing your filesystem
return $this->notFoundAction();
}
$thumb = generate_thumb($name, $x, $y);
save_thumb("public/thumbs/$x-$y-$name.png");
$response->setBody(/* image content */); // also set headers!
}
}
That will hit PHP only once when requesting`/thumbs/100-200-blah.png`
Marco Pivetta
http://twitter.com/Ocramius
http://ocramius.github.com/
On 8 February 2013 22:22, Ralf Eggert <[email protected]> wrote:
> 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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