- AWS Code Sample

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# Copyright, Inc. or its affiliates. All Rights Reserved. # SPDX-License-Identifier: Apache-2.0 """ Purpose Shows how to use the AWS SDK for Python (Boto3) with Amazon Simple Storage Service (Amazon S3) to generate a presigned URL that can perform an action for a limited time with your credentials. Also shows how to use the Requests package to make a request with the URL. """ import argparse import logging import boto3 from botocore.exceptions import ClientError import requests logger = logging.getLogger(__name__) def generate_presigned_url(s3_client, client_method, method_parameters, expires_in): """ Generate a presigned Amazon S3 URL that can be used to perform an action. :param s3_client: A Boto3 Amazon S3 client. :param client_method: The name of the client method that the URL performs. :param method_parameters: The parameters of the specified client method. :param expires_in: The number of seconds the presigned URL is valid for. :return: The presigned URL. """ try: url = s3_client.generate_presigned_url( ClientMethod=client_method, Params=method_parameters, ExpiresIn=expires_in )"Got presigned URL: %s", url) except ClientError: logger.exception( "Couldn't get a presigned URL for client method '%s'.", client_method) raise return url def usage_demo(): logging.basicConfig(level=logging.INFO, format='%(levelname)s: %(message)s') print('-'*88) print("Welcome to the Amazon S3 presigned URL demo.") print('-'*88) parser = argparse.ArgumentParser() parser.add_argument('bucket', help="The name of the bucket.") parser.add_argument( 'key', help="For a GET operation, the key of the object in Amazon S3. For a " "PUT operation, the name of a file to upload.") parser.add_argument( 'action', choices=('get', 'put'), help="The action to perform.") args = parser.parse_args() s3_client = boto3.client('s3') client_action = 'get_object' if args.action == 'get' else 'put_object' url = generate_presigned_url( s3_client, client_action, {'Bucket': args.bucket, 'Key': args.key}, 1000) print("Using the Requests package to send a request to the URL.") response = None if args.action == 'get': response = requests.get(url) elif args.action == 'put': print("Putting data to the URL.") try: with open(args.key, 'r') as object_file: object_text = response = requests.put(url, data=object_text) except FileNotFoundError: print(f"Couldn't find {args.key}. For a PUT operation, the key must be the " f"name of a file that exists on your computer.") if response is not None: print("Got response:") print(f"Status: {response.status_code}") print(response.text) print('-'*88) if __name__ == '__main__': usage_demo()