before_request.go

before_request.go

package main

import (
	"log"
	"net/http"
)

import (
	"github.com/julienschmidt/httprouter"
)

type BeforeRequest map[int]http.Handler

func (hs BeforeRequest) ServeHTTP(w http.ResponseWriter, r *http.Request) {

	// your logic check
	// ...
	// ...

	// to stop the handler, use redirect and return
	// handle the request.
	hs[0].ServeHTTP(w, r)
}

func index(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
	
}

func main() {
	router := httprouter.New()

	// Index
	router.GET("/", index)

	hs := make(BeforeRequest)
	hs[0] = router

	log.Fatal(http.ListenAndServe("0.0.0.0:2020", hs))
}