: Specifies the signing protocol. Replace [REGION] with your bucket's region (e.g., us-east-1 ).
If an object is public, you can download it using its direct Object URL . curl -O https://[BUCKET_NAME].s3.amazonaws.com/[OBJECT_KEY] Use code with caution. -O : Saves the file with its original remote name. -o [filename] : Saves the file with a custom name. 2. Download Using a Pre-signed URL download s3 object using curl
If you are using temporary credentials (e.g., from an IAM Role or STS ), you must also include the session token in a header. : Specifies the signing protocol
A pre-signed URL grants temporary access to a private object without requiring the requester to have AWS credentials. You can generate these using the AWS CLI or an SDK, then use curl to fetch the file. curl -o "local-file-name" "https://amazonaws.com&..." Use code with caution. curl -O https://[BUCKET_NAME]
Since version 7.75.0, curl has native support for AWS Signature Version 4. This is the most efficient way to download private files securely without manual header calculation.