response.writeContinue()
向客户端发送状态 100 Continue,表示应该发送请求体。查看 Http2Server 和 Http2SecureServer 上的 'checkContinue' 事件。
¥Sends a status 100 Continue to the client, indicating that the request body
should be sent. See the 'checkContinue' event on Http2Server and
Http2SecureServer.