ObjectLambdaAccessPoint

Source: src/AWS/S3Control/ObjectLambdaAccessPoint.ts

An S3 Object Lambda Access Point — intercepts S3 GetObject / HeadObject / ListObjects requests through a supporting access point and transforms responses with a Lambda function (redaction, resizing, format conversion, …).

Creating Object Lambda Access Points

Transform GetObject responses with a Lambda

import * as S3Control from "alchemy/AWS/S3Control";

const accessPoint = yield* S3Control.AccessPoint("data-ap", {
  bucket: bucket.bucketName,
});

const olap = yield* S3Control.ObjectLambdaAccessPoint("transform-ap", {
  supportingAccessPoint: accessPoint.accessPointArn,
  transformationConfigurations: [
    {
      Actions: ["GetObject"],
      ContentTransformation: {
        AwsLambda: { FunctionArn: transformer.functionArn },
      },
    },
  ],
});

Pass Range/PartNumber through and enable metrics

const olap = yield* S3Control.ObjectLambdaAccessPoint("transform-ap", {
  supportingAccessPoint: accessPoint.accessPointArn,
  allowedFeatures: ["GetObject-Range", "GetObject-PartNumber"],
  cloudWatchMetricsEnabled: true,
  transformationConfigurations: [
    {
      Actions: ["GetObject"],
      ContentTransformation: {
        AwsLambda: { FunctionArn: transformer.functionArn },
      },
    },
  ],
});