Berbagi objek dengan presigned URLs

Salin isi skrip dan simpan sebagai file “get-only-url.py”. Untuk menggunakan contoh berikut, ganti user input placeholders dengan informasi Anda sendiri (seperti nama file Anda).

import argparse
import boto3
from botocore.exceptions import ClientError

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
        )
    except ClientError:
        print(f"Couldn't get a presigned URL for client method '{client_method}'.")
        raise
    return url

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("bucket", help="The name of the bucket.")
    parser.add_argument(
        "key", help="The key (path and filename) in the S3 bucket.",
    )
    args = parser.parse_args()
    
    # By default, this will use credentials from ~/.aws/credentials
    s3_client = boto3.client("s3")
    
    # The presigned URL is specified to expire in 1000 seconds
    url = generate_presigned_url(
        s3_client, 
        "get_object", 
        {"Bucket": args.bucket, "Key": args.key}, 
        1000
    )
    print(f"Generated GET presigned URL: {url}")

if __name__ == "__main__":
    main()

Untuk menghasilkan URL yang GET telah ditetapkan sebelumnya untuk berbagi file, jalankan skrip berikut dengan nama bucket dan jalur objek yang diinginkan.

Perintah berikut menggunakan nilai contoh. Ganti user input placeholders dengan informasi Anda sendiri.

python get-only-url.py amzn-s3-demo-bucket <object-path>

Skrip akan menampilkan URL yang GET telah ditentukan sebelumnya:

Generated GET presigned URL: https://amzn-s3-demo-bucket.s3.amazonaws.com/object.txt?AWS AccessKeyId=AKIAIOSFODNN7EXAMPLE&Signature=vjbyNxybdZaMmLa%2ByT372YEAiv4%3D&Expires=1741978496

Anda dapat mengunduh file menggunakan URL presigned yang dihasilkan dengan curl:

curl -X GET "generated-presigned-url" -o "path/to/save/file"