Presigned URLs
Presigned URLs are URLs that provide temporary access to private objects in a bucket. This is useful for allowing users to upload or download objects without requiring them to have AWS credentials or permissions.
They can be used by users to download objects either by entering the URL into a web browser or by using it in code. They can also be used to allow uploads to specific objects. If an object with the same key already exists in the bucket, the presigned URL will allow the user to overwrite the object.
Expiration time
Presigned URLs are only valid for a limited time. The expiration time can be specified when generating the URL. The expiration time can be set to a maximum of 7 days.
Generating a presigned URL
Refer to the following example to generate a presigned URL: