S3 SDK setup

import boto3
from botocore.client import Config

# Endpoint, access key, and secret come from your bucket provisioning email.
EP = "https://s3south.storage.com.vn"
AK = "<your-access-key>"
SK = "<your-secret-key>"

cfg = Config(
    signature_version="s3v4",
    region_name="s3south",                        # opaque SigV4 placeholder, not AWS
    s3={"addressing_style": "path"},
    request_checksum_calculation="when_required",   # opt out of CRC32 streaming
    response_checksum_validation="when_required",
)

s3 = boto3.client(
    "s3",
    aws_access_key_id=AK,
    aws_secret_access_key=SK,
    endpoint_url=EP,
    config=cfg,
)

# Some edge proxies reject these headers on small-body PUTs. Strip them once
# at client construction time and every PutObject will be happy.
def _strip(request, **_):
    for h in ("Expect", "expect", "amz-sdk-invocation-id", "amz-sdk-request"):
        request.headers.pop(h, None)

s3.meta.events.register("before-send.s3.*", _strip)

# Round-trip a small object to confirm the client is wired correctly.
s3.put_object(Bucket="my-bucket", Key="hello.txt", Body=b"hello from htx")
print(s3.get_object(Bucket="my-bucket", Key="hello.txt")["Body"].read())