S3 presigned URLs are being created for items that do not exist. Is this normal behavior? I would rather know if the item is not going to exist when creating the link, than send users to an error page. Obviously, I can check if the item exists before I create the link, but I'm wondering if I'm doing something wrong.
1 Answers
Yes, this is normal behavior. The pre-signed URL is simply a local calculation and signing of a URL. It has no interaction with the S3 service at all.
If you want to ensure that an object exists before you generate a pre-signed URL for it, then you should head that object.
Note: you can use pre-signed URLs to upload new objects, which obviously don't yet exist at the time you generate the URL. You might also want to use pre-signed URLs to download objects that don't yet exist, but will at some later date (though I admit this is probably not that common a use case).
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