[Lambda@Edge x ウェブサイト運用] AWS S3上で静的ホスティングしたウェブサイトのアクセスURLに'/index.html'を補完する

            
            exports.handler = async (event, context, callback) => {
    const request = event.Records[0].cf.request;
    const olduri = request.uri;
    const newuri = olduri.replace(/\/$/, '\/index.html').replace(/\/([^\.\/]+)$/, '/$1/index.html');

    console.log("Old URI: " + olduri);
    console.log("New URI: " + newuri);

    request.uri = newuri;
    return callback(null, request);
};
        

            
            {
  "Records": [
    {
      "cf": {
        "config": {
          "distributionId": "EXAMPLE"
        },
        "request": {
          "uri": "/hoge",
          "method": "GET",
          "clientIp": "1111:2222::3333:4444",
          "headers": {
            "host": [
              {
                "key": "Host",
                "value": "d123.cf.net"
              }
            ]
          }
        }
      }
    }
  ]
}