read_bytes_wrapper_bug.py

import io
import os

import boto3
from botocore.config import Config
from storages.utils import ReadBytesWrapper

S3_BUCKET_NAME = os.environ["S3_BUCKET_NAME"]
FILE_KEY = "test"
FILE_CONTENT = "é"


def main():
    # boto3 will look for your credentials in the AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY and AWS_SESSION_TOKEN
    # env variables.
    session = boto3.Session()
    connection = session.resource(
        "s3",
        config=Config(
            retries={"max_attempts": 1, "mode": "standard"},
        ),
    )

    bucket = connection.Bucket(S3_BUCKET_NAME)
    obj = bucket.Object(FILE_KEY)
    content = io.StringIO(FILE_CONTENT)
    content = ReadBytesWrapper(content)
    # Defining `content` with the following line works.
    # content = io.BytesIO(FILE_CONTENT.encode("utf-8"))

    obj.upload_fileobj(content)


if __name__ == "__main__":
    main()