ELI5: what are s3 pre-signed url
// explanation
What is an S3 presigned URL?
A presigned URL is like a special ticket that gives someone permission to access a file in Amazon's storage without needing a password [2][5]. It's a regular web link, but hidden inside it are secret codes that say "this person can download this specific file until tomorrow at 3pm" [2].
Why would you use one?
Instead of giving someone your master password to access your storage, you create a special one-time ticket just for them [3][5]. It's safer because you control exactly what they can access and for how long [2].
How long does it last?
You decide when the ticket expires—maybe in 5 minutes, an hour, or a day [2]. Once time runs out, the link stops working even if someone tries to use it [5].
How do you make one?
You need proper AWS permission, and then you can create these special links for your friends or customers to download or upload files [1][4].
// sources
Apr 11, 2021 ... Anyone with valid AWS security credentials can create a pre-signed URL. However to access an object the pre-signed URL must be created with creds that have ...
A presigned URL uses security credentials to grant time-limited permission to download objects. The URL can be entered in a browser or used by a program to ...
May 6, 2022 ... First and foremost purpose of the presigned urls is to maintain conditional access to S3 buckets' contents. Use cases: - validate user then allow or disallow ...
You can also use presigned URLs to allow someone to upload a specific object to your Amazon S3 bucket. This allows an upload without requiring another party to ...
Feb 21, 2018 ... A presigned URL is a URL that you can provide to your users to grant temporary access to a specific S3 object.
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