s3.py 文件源码

def bucket_client(session, b, kms=False):
    location = b.get('Location')
    if location is None:
        region = 'us-east-1'
    else:
        region = location['LocationConstraint'] or 'us-east-1'

    if kms:
        # Need v4 signature for aws:kms crypto, else let the sdk decide
        # based on region support.
        config = Config(
            signature_version='s3v4',
            read_timeout=200, connect_timeout=120)
    else:
        config = Config(read_timeout=200, connect_timeout=120)
    return session.client('s3', region_name=region, config=config)