事件：'continue'

【Event: 'continue'】

当服务器发送 100 Continue 状态时触发，通常是因为请求中包含了 Expect: 100-continue。这是一个指示，告诉客户端应该发送请求主体。

【Emitted when the server sends a 100 Continue status, usually because the request contained Expect: 100-continue. This is an instruction that the client should send the request body.】