import time def main(request, response): head = b"""""" response.headers.set(b"Content-Length", str(len(head) + 1000)) response.headers.set(b"Content-Type", b"text/html") response.write_status_headers() response.writer.write_content(head) for i in range(100): response.writer.write_content(b"1234567890") time.sleep(0.01)