In coming up with a generalized solution, our goal was to minimize the required changes to the C++ Unreal game client code. The most obvious way to approach this problem might appear to be to create new exported DLL functions for each backend API that needs to function offline. Instead, we created a single new exported DLL function called ProcessHttpRequest. This function takes in a struct representing a standard HTTP request and returns a struct representing a standard HTTP response. We started referring to this system with the tongue-in-cheek name “serverless service” and it stuck.
Александра Синицына (Ночной линейный редактор)
，这一点在服务器推荐中也有详细论述
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Subresource Integrity — MDN Web Docs