Creating presigned url for a S3 folder in python

Question

I'm trying to generate a presigned url to a S3 folder (which itself contains more folders/files) and distribute it between my clients so they can download its content. i.e. by clicking the link, the users will download the folder to their local disk.

However, I keep getting a "no such key" error in an XML dialogue.

I'm using client.generate_presigned_url() from boto3 sdk

def create_presigned_url(bucket, object):
    try:
        url = s3_client.generate_presigned_url(
            'get_object',
            Params={
                'Bucket': bucket,
                'Key': object
            },
            ExpiresIn=240,
            HttpMethod='GET'
        )
    except ClientError as e:
        print(e)
        return None
    return url

this is the error message:

This XML file does not appear to have any style information associated with it. The document tree is shown below.
<Error>
   <Code>NoSuchKey</Code>
      <Message>The specified key does not exist.</Message>
         <Key>output/BARNES/070419/APR19BAR/</Key>
         <RequestId>E6BE736FE945FA22</RequestId>
         <HostId>
      hk3+d+***********************************************************+EO2CZmo=
          </HostId>
</Error>

Answer 1

S3 has no concept of "folders". What you are effectively trying to do here is create a presigned url for multiple keys which is also not possible. If you absolutely have to share single url for multiple files, you'll need zip them into a single object and then share key of that object using presigned url.