async_server.py 文件源码

def root(request):
    """Return the root endpoint, serve the index.html.

    :param request: a web requeest object.
    :type request: request | None
    """
    log.info("Root page requested.")
    index_file = open(index_path)
    log.info("Serving %s", index_path)
    resp = web.Response(body=index_file.read().encode('utf-8'))
    resp.headers['content-type'] = 'text/html'
    return resp