pub fn fn_service<F, Fut, Req, Res, Err, Cfg>( f: F ) -> FnServiceFactory<F, Fut, Req, Res, Err, Cfg>where F: Fn(Req) -> Fut + Clone, Fut: Future<Output = Result<Res, Err>>,
Create ServiceFactory for function that can act as a Service
ServiceFactory
Service