When to Use

Use it to grant temporary access to private assets.

• And these assets should remain private

It is not possible to extend the lifetime of a pre-signed URL beyond its original expiration timestamp.

Implement presigned URL by having it be generated when the page with private content is being rendered.

• This allows for smooth re-signing of URL while retaining minimal duration

This does add a layer to security because even if someone spreads the link to private asset cannot continue to abuse the link

• And the people who got the original link cannot keep abusing it without receiving another legit URL

When Not to Use

If the files are read-only and public, and should remain that way, then there is no need to add the complexity of using a pre-signed url