Test if a file is a valid jpg file #3778
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During preview generation if we provide an invalid JPG file the system errors out with a PHP Fatal Error. Now we can't catch Fatal Errors (in 5.6). I suspect that exif_imagetype to fall back to the extention. However a valid jpg file has a size. So we request the size of the image and just drop out if that returns false. Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
This was referenced Mar 14, 2017
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During preview generation if we provide an invalid JPG file the system
errors out with a PHP Fatal Error. Now we can't catch Fatal Errors (in
5.6). I suspect that exif_imagetype to fall back to the extention.
However a valid jpg file has a size. So we request the size of the image
and just drop out if that returns false.