response.sendDate
如果为真，则 Date 标头将自动生成并在响应中发送，如果它尚未出现在标头中。默认为真。
¥When true, the Date header will be automatically generated and sent in the response if it is not already present in the headers. Defaults to true.
这应该只在测试时被禁用；HTTP 要求在响应中使用 Date 标头。
¥This should only be disabled for testing; HTTP requires the Date header in responses.