package main
import (
    "log"
    "net/http"
    "github.com/prometheus/client_golang/prometheus/promhttp"
    prommiddleware "github.com/slok/go-prometheus-middleware"
)
func main() {
    // Create our middleware.
    mdlw := prommiddleware.NewDefault()
    // Our handler.
    myHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
        w.Write([]byte("hello world!"))
    })
    h := mdlw.Handler("", myHandler)
    // Serve metrics.
    log.Printf("serving metrics at: %s", ":9090")
    go http.ListenAndServe(":9090", promhttp.Handler())
    // Serve our handler.
    log.Printf("listening at: %s", ":8080")
    if err := http.ListenAndServe(":8080", h); err != nil {
        log.Panicf("error while serving: %s", err)
    }
}

package main
import (
    "log"
    "net/http"
    "github.com/prometheus/client_golang/prometheus/promhttp"
    metrics "github.com/slok/go-http-metrics/metrics/prometheus"
    "github.com/slok/go-http-metrics/middleware"
)
func main() {
    // Create our middleware.
    mdlw := middleware.New(middleware.Config{
        Recorder: metrics.New(metrics.Config{}),
    })
    // Our handler.
    myHandler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
        w.Write([]byte("hello world!"))
    })
    h := mdlw.Handler("", myHandler)
    // Serve metrics.
    log.Printf("serving metrics at: %s", ":9090")
    go http.ListenAndServe(":9090", promhttp.Handler())
    // Serve our handler.
    log.Printf("listening at: %s", ":8080")
    if err := http.ListenAndServe(":8080", h); err != nil {
        log.Panicf("error while serving: %s", err)
    }
}