@Marvin how would I set the hash function used when uploading to s3 in prefect 2.19?

So you want to play around with hashing while dealing with S3 in Prefect 2.19? Let's get to it! I'll search the Prefect 2.x documentation for the relevant details. Give me a moment. Okay, it seems like there was an issue with how I formatted the search request. Let's correct that. I'll try searching for relevant queries again. It looks like Prefect 2.x documentation provides details about interacting with AWS S3, using tasks and storage blocks, but doesn't explicitly mention setting a hash function for uploads. You may need to implement custom logic within your Prefect flow to set or manage the hash function. Wrapping your upload logic in a Prefect task should allow you to use any hash function you'd like. Here's a generalized example for wrapping your upload logic in a Prefect task:

python
from prefect import flow, task
import hashlib
import boto3

@task
def upload_to_s3(bucket_name, key, data, hash_alg='md5'):
    s3 = boto3.client('s3')
    
    # Compute hash
    if hash_alg == 'sha256':
        hash = hashlib.sha256(data).hexdigest()
    else:
        hash = hashlib.md5(data).hexdigest()
    
    s3.put_object(Bucket=bucket_name, Key=key, Body=data, Metadata={'hash': hash})

@flow
def my_flow():
    data = b'Your data'
    upload_to_s3('my-bucket', 'my-key', data, hash_alg='sha256')

my_flow()

This way you can control the hash function used for your uploads. Feel free to check out more details in the Prefect AWS S3 integration docs: Prefect AWS S3 Integration

@Marvin s3 supports hashing algo's natively, they do not need to be added as Metadata. Can I do this through prefect-aws?

Okay, S3 indeed supports specifying hash algorithms natively. Let me check if Prefect's AWS integration directly supports setting these algorithms via their interface. Hang tight while I look in the Prefect 2.x documentation and GitHub issues for more details on this. It seems the Prefect documentation and GitHub issues do not directly provide information on configuring native S3 hash functions (like MD5 or SHA256) through the Prefect AWS module. Based on the documentation snippets, the Prefect AWS integration primarily focuses on bucket and credential management. However, you can utilize the native Boto3 client within a Prefect task to set the hash function. Here's how you can do it using Boto3's

put_object

method within a Prefect task:

python
from prefect import flow, task
import boto3

@task
def upload_to_s3(bucket_name, key, data, checksum_algorithm='sha256'):
    s3_client = boto3.client('s3')
    
    s3_client.put_object(Bucket=bucket_name, Key=key, Body=data, ChecksumAlgorithm=checksum_algorithm.upper())

@flow
def my_flow():
    data = b'Your data content'
    upload_to_s3('my-bucket', 'my-key', data, checksum_algorithm='sha256')

my_flow()

This example shows how to use the

ChecksumAlgorithm

parameter to specify the hash function for S3 uploads. This way, you can leverage Boto3's capabilities alongside Prefect. For more details on the Boto3

put_object

method, you can refer to Boto3 S3 Documentation. If you need deeper Prefect-specific integration features, you might want to follow the latest updates or raise a feature request in the Prefect GitHub repository. Links for reference: - Prefect AWS S3 Integration - Boto3 S3 Client put_object If you have other specifics in mind or run into issues, feel free to ask!