Function pull

packages/platform/deno/test/DenoHttpServer.test.ts:594–599

(controller)

              const reader = source.getReader()
              const body = new ReadableStream<Uint8Array>({
                pull(controller) {
                  return reader.read().then(({ done, value }) => {
                    if (done) controller.close()
                    else controller.enqueue(value)
                  })
                },
                cancel(reason) {
                  cancelled = true
                  return reader.cancel(reason)