@aws-sdk/middleware-flexible-checksums

What is @aws-sdk/middleware-flexible-checksums?

@aws-sdk/middleware-flexible-checksums is a middleware package for the AWS SDK for JavaScript. It provides functionality to handle flexible checksums for AWS services, ensuring data integrity during transmission.

What are @aws-sdk/middleware-flexible-checksums's main functionalities?

Adding Checksum to Requests

This feature allows you to add a checksum to your S3 PutObject requests to ensure data integrity during transmission.

const { S3Client, PutObjectCommand } = require('@aws-sdk/client-s3');
const { flexibleChecksumsMiddleware } = require('@aws-sdk/middleware-flexible-checksums');

const client = new S3Client({
  region: 'us-west-2',
});

client.middlewareStack.add(flexibleChecksumsMiddleware(), {
  step: 'build',
  priority: 'high',
});

const command = new PutObjectCommand({
  Bucket: 'example-bucket',
  Key: 'example-key',
  Body: 'Hello, world!',
});

client.send(command).then((response) => {
  console.log('Success', response);
}).catch((error) => {
  console.error('Error', error);
});

Validating Checksum in Responses

This feature allows you to validate the checksum in the response from an S3 GetObject request to ensure data integrity.

const { S3Client, GetObjectCommand } = require('@aws-sdk/client-s3');
const { flexibleChecksumsMiddleware } = require('@aws-sdk/middleware-flexible-checksums');

const client = new S3Client({
  region: 'us-west-2',
});

client.middlewareStack.add(flexibleChecksumsMiddleware(), {
  step: 'deserialize',
  priority: 'high',
});

const command = new GetObjectCommand({
  Bucket: 'example-bucket',
  Key: 'example-key',
});

client.send(command).then((response) => {
  console.log('Success', response);
}).catch((error) => {
  console.error('Error', error);
});

Other packages similar to @aws-sdk/middleware-flexible-checksums

aws-sdk

The 'aws-sdk' package is the official AWS SDK for JavaScript. It provides a comprehensive set of tools for interacting with AWS services, including S3. While it does not specifically focus on flexible checksums, it offers a wide range of functionalities for AWS services.

aws4

The 'aws4' package is a lightweight library for signing AWS requests using AWS Signature Version 4. It does not provide checksum functionality but is useful for securely signing requests to AWS services.

s3-upload-stream

The 's3-upload-stream' package is a Node.js library for streaming uploads to Amazon S3. It focuses on streaming data to S3 and does not provide checksum functionality, but it is useful for handling large file uploads.

README

@aws-sdk/middleware-flexible-checksums

This package provides AWS SDK for JavaScript middleware that applies a checksum of the request body as a header.

Changelog

3.758.0 (2025-02-27)

Bug Fixes

• codegen: variable allocation in StringStore (#6903) (5deccb9)

Features

• client-bedrock-agent-runtime: Introduces Sessions (preview) to enable stateful conversations in GenAI applications. (f62fcc0)
• client-qbusiness: This release supports deleting attachments from conversations. (e5ad270)
• client-redshift-serverless: Add track support for Redshift Serverless workgroup. (a3fdee6)
• client-sagemaker: SageMaker HubService is introducing support for creating Training Jobs in Curated Hub (Private Hub). Additionally, it is introducing two new APIs: UpdateHubContent and UpdateHubContentReference. (5850cdd)
• client-storage-gateway: This release adds support to invoke a process that cleans the specified file share's cache of file entries that are failing upload to Amazon S3. (6ee1cf4)
• clients: update client endpoints as of 2025-02-27 (cee1e67)