This is a simple file showing how to write middleware in golang.It also provides an easy way of chaining middlewares

middleware.go

package middleware

import (
	"net/http"

	"strings"

)

type Middleware func( http.Handler) http.Handler

//a function that returns a middleware type
func ValidateUserToken() Middleware {
	return func(h http.Handler) http.Handler {
		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			///your middleware logic goes here e.g user validation

			h.ServeHTTP(w, r)
		})
	}
}


func Adapt(h http.Handler, adapters ...Middleware) http.Handler {
    ///This functions allows you to chain multiple middlewares
    ///You pass a list of middleware and a handler and it returns a handler
	for _, adapter := range adapters {
		h = adapter(h)
	}
	return h
}