Wrapper to generate a pre-signed URL for temporary access (up to 7 days) to a file in an otherwise inaccessible S3 bucket. Optionally supports S3 Transfer Acceleration

generate_s3_presigned_url.py

# DO NOTE: this will generate a url even if the file_name is not actually in the bucket
def generate_s3_presigned_url(bucket_name, file_name, **kwargs):
    client = boto3.client(
        's3',
        config=Config(
            signature_version='s3v4',
            s3 = {'use_accelerate_endpoint': kwargs.get("accelerate_endpoint", False)}
        )
    )

    url = client.generate_presigned_url(
        ClientMethod='get_object',
        Params={'Bucket': bucket_name, 'Key': file_name},
        ExpiresIn=kwargs.get("TTL", 3600) # one hour
    )
    return url