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Unable to upload a picture to answers, questions, etc.
I'm using Mozilla Firefox. When I try to upload a picture to a question or answer, I get the following error:
error: "Images must be one of png, jpeg, jpg, gif"
However, it would be easy to verify whether or not I have the correct file type for the picture. I'm 100% sure that I'm updating the right file type.
When I use the internet browser's inspector tool and attempt to upload a picture, I get the following response:
Status: 400 Bad Request
Version: HTTP/2
Transferred: 1.24 KB (53 B size)
Is anyone else having this issue? Do I need to copy more specific information? (if so, then please elaborate)? Is the token generated by this request not valid?
1 answer
OK. This appears to be a variant of the known image issues. Specifically, it is relying on extension to determine image type, rather than doing an analysis after upload.
However, it appears that SomeOther sites do something very similar, so this is far from a uniquely Codidact problem.
The problem is a bit of a tricky one. Limiting based on extension is a time-honored technique to help filter bad (or just useless) files. On the other hand, it is no guarantee that the files are what they say they are - e.g., an executable masquerading as an image. The solution to that problem is to a check after upload to make sure the content nominally matches the stated filetype.
Until we get a far more sophisticated image upload process, I think this will stay "as is" - but others may be willing to tackle it, so we'll see.
1 comment thread