echo

EchoMiddleware shows how you would create a default middleware factory and use it to create an Echo compatible middleware.

// Create our middleware factory with the default settings.
mdlw := middleware.New(middleware.Config{
	Recorder: metrics.NewRecorder(metrics.Config{}),
})

// Create our echo instance.
e := echo.New()

// Add our handler and middleware
h := func(c echo.Context) error {
	return c.String(http.StatusOK, "Hello world")
}
e.GET("/", h, echoMiddleware.Handler("", mdlw))

// Serve metrics from the default prometheus registry.
log.Printf("serving metrics at: %s", ":8081")
go func() {
	_ = http.ListenAndServe(":8081", promhttp.Handler())
}()

// Serve our handler.
log.Printf("listening at: %s", ":8080")
if err := http.ListenAndServe(":8080", e); err != nil {
	log.Panicf("error while serving: %s", err)
}