https://github.com/pyramation/etag-hash

Es6 class that generates ETag using the same algorithm as S3 via MD5 sum.
https://github.com/pyramation/etag-hash

es6 etag hash md5 minio node-module npm s3

Last synced: 3 months ago
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Es6 class that generates ETag using the same algorithm as S3 via MD5 sum.

• Host: GitHub
• URL: https://github.com/pyramation/etag-hash
• Owner: pyramation
• License: mit
• Created: 2018-10-15T05:23:02.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2020-10-01T00:22:00.000Z (over 4 years ago)
• Last Synced: 2024-10-11T08:14:51.550Z (3 months ago)
• Topics: es6, etag, hash, md5, minio, node-module, npm, s3
• Language: JavaScript
• Size: 10.7 KB
• Stars: 2
• Watchers: 2
• Forks: 3
• Open Issues: 1
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE

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README

        
# ETag Hash ![Build Status](https://travis-ci.org/pyramation/etag-hash.svg?branch=master)

Es6 class that generates ETag using the same algorithm as S3 via MD5 sum.

Useful for verifying Amazon S3 multi-part uploads.

## Installation

```sh

npm install etag-hash

```

## Usage

```js

const createHash = require('etag-hash').createHash;

const etag = createHash().update(contents).digest();

```

ETags compatible with s3, API similar to the crypto module to be compatible with streams. Thanks to the author of [this post](https://stackoverflow.com/questions/12186993/what-is-the-algorithm-to-compute-the-amazon-s3-etag-for-a-file-larger-than-5gb#answer-19896823) for the breakdown of the algorithm.