Copies index.html to / in S3

indice.py

# Copyright Andrew Jorgensen
# SPDX-License-Identifier: MIT
import json
from os import environ

import boto3

MAP = json.loads(environ.get("MAP", '{"index.html":"/"}'))
CLIENT = boto3.client("s3")


def copy_index(record):
    print(json.dumps(record))
    key = record["s3"]["object"]["key"]
    basename = ("/" + key).rsplit("/", 1)[1]
    if basename not in MAP:
        print(f"Skipping {key}, not in {json.dumps(MAP)}")
        return
    region = record["awsRegion"]
    bucket = record["s3"]["bucket"]["name"]
    index_key = key[: -(len(basename) + 1)] + MAP[basename]
    print(f"Copying {key} to {index_key}")
    CLIENT.copy(
        CopySource={"Bucket": bucket, "Key": key},
        Bucket=bucket,
        Key=index_key,
        ExtraArgs={"ACL": "public-read"},
    )


def lambda_handler(event, context):
    print(json.dumps(MAP))
    for record in event["Records"]:
        copy_index(record)