Convert a ReadableStream to a Buffer

To convert a ReadableStream to a Buffer, read its contents into an ArrayBuffer with Bun.readableStreamToArrayBuffer, then create a Buffer that points to it.

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

See Bun’s other ReadableStream conversion functions.

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Convert a ReadableStream to a Buffer