func MyHandler(next http.Handler) http.Handler { // return a new handler that wraps the next handler return rack.Handler(func(ctx context.Context, req *http.Request) (interface{}, error) { // perform some logic and return the response return MyResponse{}, nil }, next) }
func MyMiddleware(next http.Handler) http.Handler { // return a new handler that wraps the next handler return rack.HandlerFunc(func(w http.ResponseWriter, req *http.Request) { // perform some logic and write to the response writer w.Write([]byte("Hello, world!")) }) }In this example, we define a new middleware function called `MyMiddleware` that takes in a `next` handler as a parameter. Inside this function, we return a new `rack.HandlerFunc` that wraps the `next` handler. The `rack.HandlerFunc` takes in a function that will be called to handle the incoming request. In this case, we define an anonymous function that simply writes "Hello, world!" to the response writer. Overall, the `github.com/jrperritt/rack/handler` package provides a flexible yet simple way to handle HTTP requests and responses in Go web applications.