ReadableStream-to-String.ts

// Option 1
async function streamToString(stream: NodeJS.ReadableStream): Promise<string> {
  const chunks: Array<any> = [];
  for await (let chunk of stream) {
      chunks.push(chunk)
  }
  const buffer = Buffer.concat(chunks);
  return buffer.toString("utf-8")
}

// Option 2
function streamToString2(stream: NodeJS.ReadableStream): Promise<string> {
  const chunks: Array<any> = []
  return new Promise((resolve, reject) => {
    stream.on('data', chunk => chunks.push(chunk))
    stream.on('error', reject)
    stream.on('end', () => resolve(Buffer.concat(chunks).toString('utf8')))
  })
}

Above didn't work but other version did work:

async function streamToString(stream: any) {
  const reader = stream.getReader();
  const textDecoder = new TextDecoder();
  let result = '';

  async function read() {
    const { done, value } = await reader.read();

    if (done) {
      return result;
    }

    result += textDecoder.decode(value, { stream: true });
    return read();
  }

  return read();
}