Function writeIterable

deps/undici/src/lib/dispatcher/client-h2.js:1391–1447

(abort, h2stream, body, client, request, socket, contentLength, expectsPayload)

}

async function writeIterable (abort, h2stream, body, client, request, socket, contentLength, expectsPayload) {
  assert(contentLength !== 0 || client[kRunning] === 0, 'iterator body cannot be pipelined')

  let callback = null
  function onDrain () {
    if (callback) {
      const cb = callback
      callback = null
      cb()
    }
  }

  const waitForDrain = () => new Promise((resolve, reject) => {
    assert(callback === null)

    if (socket[kError]) {
      reject(socket[kError])
    } else {
      callback = resolve
    }
  })

  h2stream
    .on('close', onDrain)
    .on('drain', onDrain)

  try {
    // It's up to the user to somehow abort the async iterable.
    for await (const chunk of body) {
      if (socket[kError]) {
        throw socket[kError]
      }

      const res = h2stream.write(chunk)
      request.onBodySent(chunk)
      if (!res) {
        await waitForDrain()
      }
    }

    h2stream.end()

    request.onRequestSent()

    if (!expectsPayload) {
      socket[kReset] = true
    }

    client[kResume]()
  } catch (err) {
    abort(err)
  } finally {
    h2stream
      .off('close', onDrain)
      .off('drain', onDrain)
  }
}