58 lines
1.8 KiB
Markdown
58 lines
1.8 KiB
Markdown
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# fetch-blob
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[![npm version][npm-image]][npm-url]
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[![build status][ci-image]][ci-url]
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[![coverage status][codecov-image]][codecov-url]
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[![install size][install-size-image]][install-size-url]
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A Blob implementation in Node.js, originally from [node-fetch](https://github.com/node-fetch/node-fetch).
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## Installation
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```sh
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npm install fetch-blob
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```
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## Usage
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```js
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const Blob = require('fetch-blob');
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const fetch = require('node-fetch');
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fetch('https://httpbin.org/post', {
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method: 'POST',
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body: new Blob(['Hello World'], { type: 'text/plain' })
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})
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.then(res => res.json());
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.then(json => console.log(json));
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```
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### Blob part backed up by filesystem
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To use, install [domexception](https://github.com/jsdom/domexception).
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```sh
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npm install fetch-blob domexception
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```
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```js
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const blobFrom = require('fetch-blob/from.js');
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const blob1 = blobFrom('./2-GiB-file.bin');
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const blob2 = blobFrom('./2-GiB-file.bin');
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// Not a 4 GiB memory snapshot, just holds 3 references
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// points to where data is located on the disk
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const blob = new Blob([blob1, blob2]);
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console.log(blob.size) // 4 GiB
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```
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See the [MDN documentation](https://developer.mozilla.org/en-US/docs/Web/API/Blob) and [tests](https://github.com/node-fetch/fetch-blob/blob/master/test.js) for more details.
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[npm-image]: https://flat.badgen.net/npm/v/fetch-blob
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[npm-url]: https://www.npmjs.com/package/fetch-blob
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[ci-image]: https://github.com/node-fetch/fetch-blob/workflows/CI/badge.svg
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[ci-url]: https://github.com/node-fetch/fetch-blob/actions
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[codecov-image]: https://flat.badgen.net/codecov/c/github/node-fetch/fetch-blob/master
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[codecov-url]: https://codecov.io/gh/node-fetch/fetch-blob
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[install-size-image]: https://flat.badgen.net/packagephobia/install/fetch-blob
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[install-size-url]: https://packagephobia.now.sh/result?p=fetch-blob
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