How can I implement S3 pre-signed URLs?

In the context of AWS, here are the appropriate approaches given:-

Generating Pre-signed URLs for file upload

When a user uploads a file, your servers generally generate a pre-signed URL with the ‘putObject’ operation for the S2 bucket. This URL would allow the client-side application to directly upload the file to S3 without going through your server.

Here Is the example code given in Python by using Boto3:-

Import boto3

Def generate_presigned_url_for_upload(bucket_name, object_key, expiration=3600):
    # Initialize S3 client
    S3_client = boto3.client(‘s3’)
    # Generate a pre-signed URL for upload with expiration time
    Presigned_url = s3_client.generate_presigned_url(
        ClientMethod=’put_object’,
        Params={‘Bucket’: bucket_name, ‘Key’: object_key},
        ExpiresIn=expiration
    )
    Return presigned_url
# Example usage
Bucket_name = ‘your_bucket_name’
Object_key = ‘uploaded_file.txt’
Upload_url = generate_presigned_url_for_upload(bucket_name, object_key)
Print(“Pre-signed URL for upload:”, upload_url)
Generating Pre-signed URLs for file download

When a user uploads a file, your servers generally generate a pre-signed URL with the ‘putObject’ operation for the S2 bucket. This URL would allow the client-side application to directly upload the file to S3 without going through your server.

Here Is the example code in python using Boto3 given:-

Import boto3

Def generate_presigned_url_for_download(bucket_name, object_key, expiration=3600):
    # Initialize S3 client
    S3_client = boto3.client(‘s3’)
    # Generate a pre-signed URL for download with expiration time
    Presigned_url = s3_client.generate_presigned_url(
        ClientMethod=’get_object’,
        Params={‘Bucket’: bucket_name, ‘Key’: object_key},
        ExpiresIn=expiration
    )
    Return presigned_url
# Example usage
Bucket_name = ‘your_bucket_name’
Object_key = ‘file_to_download.txt’
Download_url = generate_presigned_url_for_download(bucket_name, object_key)
Print(“Pre-signed URL for download:”, download_url)