@aws-sdk/middleware-eventstream

What is @aws-sdk/middleware-eventstream?

@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);

Other packages similar to @aws-sdk/middleware-eventstream

event-stream

The event-stream package is a toolkit for working with streams in Node.js. It provides a variety of utilities for creating and manipulating streams, including event streams. Compared to @aws-sdk/middleware-eventstream, event-stream is more general-purpose and not specifically tailored for AWS services.

kinesis-client-library

The kinesis-client-library is a package for working with Amazon Kinesis streams. It provides high-level abstractions for consuming and processing data from Kinesis streams. While it focuses specifically on Kinesis, it offers similar event stream handling capabilities as @aws-sdk/middleware-eventstream.

README

@aws-sdk/middleware-eventstream

Changelog

3.162.0 (2022-08-31)

Bug Fixes

• lib-dynamodb: declare File interface without requiring dom lib (#3890) (574507f)
• types: declare ReadableStream type without requiring dom (#3889) (061b5f5)

Features

• client-identitystore: Expand IdentityStore API to support Create, Read, Update, Delete and Get operations for User, Group and GroupMembership resources. (4227bb3)
• client-iotthingsgraph: This release deprecates all APIs of the ThingsGraph service (2584904)
• client-ivs: IVS Merge Fragmented Streams. This release adds support for recordingReconnectWindow field in IVS recordingConfigurations. For more information see https://docs.aws.amazon.com/ivs/latest/APIReference/Welcome.html (2cec549)
• client-sagemaker: SageMaker Inference Recommender now accepts Inference Recommender fields: Domain, Task, Framework, SamplePayloadUrl, SupportedContentTypes, SupportedInstanceTypes, directly in our CreateInferenceRecommendationsJob API through ContainerConfig (7ab95c9)