Express doesn't return 304 for static json

Question

I'm using express.static to serve a very large, static json file. While express.static will return 304 when other static resources are unchanged, it always returns 200 for static json.

Because of the size of the file and the nature of my application, I want to avoid clients downloading the file unless it has changed.

How can I convince express to return 304 for my json?

Answer 1

您可以在返回中强制使用状态代码：

res.status(304).json({ data: 'data' }); // or 200