@aws-sdk/middleware-eventstream is a middleware package for the AWS SDK for JavaScript. It provides functionality to handle event streams, which are used in various AWS services to deliver real-time data. This package is essential for working with services that use event streams, such as AWS Transcribe, AWS Kinesis, and others.

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

Event Stream Handling

This feature allows you to handle event streams by marshalling data into the event stream format. The code sample demonstrates how to create an event stream using the EventStreamMarshaller.

const { EventStreamMarshaller } = require('@aws-sdk/middleware-eventstream');

const marshaller = new EventStreamMarshaller();

const eventStream = marshaller.marshall({
  headers: {},
  body: Buffer.from('example event data')
});

console.log(eventStream);

Event Stream Unmarshalling

This feature allows you to unmarshall event streams back into their original data format. The code sample demonstrates how to unmarshall an event stream using the EventStreamMarshaller.

const { EventStreamMarshaller } = require('@aws-sdk/middleware-eventstream');

const marshaller = new EventStreamMarshaller();

const eventStream = Buffer.from('example event stream');
const event = marshaller.unmarshall(eventStream);

console.log(event);

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Changelog

Source

3.429.0 (2023-10-16)

Bug Fixes

lib-dynamodb: backwards compat for undefined columns (#5365) (65d5b36)
middleware-host-header: populate :authority pseudo-header with authority section of target URI (#5369) (242a32c)

Features

client-cloudformation: SDK and documentation updates for UpdateReplacePolicy (c1fd48e)
client-drs: Updated exsiting API to allow AWS Elastic Disaster Recovery support of launching recovery into existing EC2 instances. (d861f67)
client-entityresolution: This launch expands our matching techniques to include provider-based matching to help customer match, link, and enhance records with minimal data movement. With data service providers, we have removed the need for customers to build bespoke integrations,. (ba8b3ef)
client-managedblockchain-query: This release introduces two new APIs: GetAssetContract and ListAssetContracts. This release also adds support for Bitcoin Testnet. (6dc7cd7)
client-mediapackagev2: This release allows customers to manage MediaPackage v2 resource using CloudFormation. (8a89009)
client-opensearch: This release allows customers to list and associate optional plugin packages with compatible Amazon OpenSearch Service clusters for enhanced functionality. (90dcb19)
client-redshift-serverless: Added support for managing credentials of serverless namespace admin using AWS Secrets Manager. (00b6795)
client-redshift: Added support for managing credentials of provisioned cluster admin using AWS Secrets Manager. (81f66cb)
client-sesv2: This release provides enhanced visibility into your SES identity verification status. This will offer you more actionable insights, enabling you to promptly address any verification-related issues. (95a8827)
client-xray: This releases enhances GetTraceSummaries API to support new TimeRangeType Service to query trace summaries by segment end time. (8da8457)
clients: update client endpoints as of 2023-10-16 (d71d199)

Readme

Source

@aws-sdk/middleware-eventstream

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Last updated on 16 Oct 2023

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