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@aws-sdk/eventstream-codec

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@aws-sdk/eventstream-codec

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What is @aws-sdk/eventstream-codec?

The @aws-sdk/eventstream-codec npm package is designed to handle AWS event streams, providing utilities for encoding and decoding messages in the event stream format used by AWS services. This package is particularly useful when working with AWS services that utilize event streams for real-time data processing.

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

Encoding messages

This feature allows you to encode messages into the AWS event stream format. The `marshall` function takes a message object with headers and a body and returns a Buffer of the encoded message.

const { marshall } = require('@aws-sdk/eventstream-codec');
const message = {
  headers: {
    ':message-type': {
      type: 'string',
      value: 'event'
    },
    ':event-type': {
      type: 'string',
      value: 'Records'
    }
  },
  body: Buffer.from('Hello, this is a test message')
};
const encodedMessage = marshall(message);

Decoding messages

This feature enables the decoding of messages from the AWS event stream format. The `unmarshall` function takes a Buffer of an encoded message and returns an object representing the decoded message, including headers and body.

const { unmarshall } = require('@aws-sdk/eventstream-codec');
const encodedMessage = Buffer.from(/* previously encoded message */);
const decodedMessage = unmarshall(encodedMessage);
console.log(decodedMessage);

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Package last updated on 06 Jun 2023

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