package main

import (

"log"

"net/http"

)

func main() {

http.HandleFunc("/", handler)

http.ListenAndServe(":8081", nil)

}

func handler(w http.ResponseWriter, r *http.Request) {

keys, ok := r.URL.Query()["key"]if !ok || len(keys) < 1 {    log.Println("Url Param 'key' is missing")    return}// Query()["key"] will return an array of items,// we only want the single item.key := keys[0]log.Println("Url Param 'key' is: " + string(key))

}