In Go-Kit tutorial. I encounter an syntax which not familiar to me.
type uppercaseRequest struct {
S string `json:"s"`
}
and Endpoints example :-
func makeUppercaseEndpoint(svc StringService) endpoint.Endpoint {
return func(_ context.Context, request interface{}) (interface{}, error) {
req := request.(uppercaseRequest)
v, err := svc.Uppercase(req.S)
if err != nil {
return uppercaseResponse{v, err.Error()}, nil
}
return uppercaseResponse{v, ""}, nil
}
}
I am having difficulty in understanding the below line
req := request.(uppercaseRequest)
Help me !!!