func myHandler(req *http.Request) rack.Result { // Process the request and generate a result return rack.NewResult(200, nil, []byte("Hello, world!")) } func main() { // Create a new Rack server and register our handler server := rack.NewServer() server.RegisterHandler("/", myHandler) // Start the server server.Run(":8080") }
func myErrorHandler(err error, req *http.Request) rack.Result { // Handle errors and generate a result return rack.NewResult(500, nil, []byte("Internal server error")) } func main() { // Create a new Rack server and register our error handler server := rack.NewServer() server.RegisterErrorHandler(myErrorHandler) // Start the server server.Run(":8080") }In this example, we define a "myErrorHandler" function that takes an error and an HTTP request and generates a "Resource Result" object with a 500 status code and an error message in the body. We then create a new Rack server and register our error handler function. If an error occurs while processing a request, the server will invoke our error handler to generate an appropriate error response.