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Convert a ReadableStream to a Buffer with Bun

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Bun provides a number of convenience functions for reading the contents of a ReadableStream into different formats. This snippet reads the contents of a ReadableStream to an ArrayBuffer, then creates a Buffer that points to it.

const stream = new ReadableStream();
const arrBuf = await Bun.readableStreamToArrayBuffer(stream);
const nodeBuf = Buffer.from(arrBuf);

See Docs > API > Utils for documentation on Bun's other ReadableStream conversion functions.

Ecosystem

Use React and JSX

Use EdgeDB with Bun

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Create a Discord bot

Add Sentry to a Bun app

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HTTP

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Streams

Convert a ReadableStream to JSON

Convert a Node.js Readable to JSON

Convert a ReadableStream to a Blob

Convert a Node.js Readable to a Blob

Convert a ReadableStream to a Buffer

Convert a ReadableStream to a string

Convert a Node.js Readable to a string

Convert a ReadableStream to a Uint8Array

Convert a ReadableStream to an ArrayBuffer

Convert a Node.js Readable to an Uint8Array

Convert a Node.js Readable to an ArrayBuffer

Convert a ReadableStream to an array of chunks

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Write a ReadableStream to a file