func validateHttpArguments()

in fc/http_handler.go [35:52]

• 18 lines of code
• 4 McCabe index (conditional complexity)

func validateHttpArguments(handler reflect.Type) error {
	if handler.NumIn() != 3 {
		return fmt.Errorf("http handler should takes three arguments, but handler takes %d", handler.NumIn())
	}
	contextType := reflect.TypeOf((*context.Context)(nil)).Elem()
	argumentType := handler.In(0)
	if !argumentType.Implements(contextType) {
		return fmt.Errorf("handler takes three arguments, but the first is not Context. got %s",
			argumentType.Kind())
	}
	responseWriterType := reflect.TypeOf((*http.ResponseWriter)(nil)).Elem()
	argumentType = handler.In(1)
	if !argumentType.Implements(responseWriterType) {
		return fmt.Errorf("handler takes three arguments, but the second is not http.ResponseWriter. got %s",
			argumentType.Kind())
	}
	return nil
}