Golang : Gorilla mux routing example

This is a short tutorial on how to use Gorilla's mux. The code example below is taken from previous tutorial on web routing and with minor addition.

 package main

 import (
 "fmt"
 "github.com/gorilla/mux"
 "net/http"
 )

 func SayHelloWorld(w http.ResponseWriter, r *http.Request) {
 w.Write([]byte("Hello, World!"))
 }

 func Greet(w http.ResponseWriter, r *http.Request) {
 name := mux.Vars(r)["name"]
 w.Write([]byte(fmt.Sprintf("Hello %s !", name)))
 }

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

 // break down the variables for easier assignment
 vars := mux.Vars(r)
 name := vars["name"]
 job := vars["job"]
 age := vars["age"]
 w.Write([]byte(fmt.Sprintf("Name is %s ", name)))
 w.Write([]byte(fmt.Sprintf("Job is %s ", job)))
 w.Write([]byte(fmt.Sprintf("Age is %s ", age)))
 }

 func main() {
 mx := mux.NewRouter()

 mx.HandleFunc("/", SayHelloWorld)
 mx.HandleFunc("/{name}", Greet)

 //to handle URL like
 //http://website:8080/person/Boo/CEO/199

 //http://website:8080/person/Boo/CEO/199 <- if age > 199, will cause 404 error

 mx.HandleFunc("/person/{name}/{job}/{age:[0-199]+}", ProcessPathVariables)

 http.ListenAndServe(":8080", mx)
 }

Tests output :

URL : http://162.243.5.230:8080/person/Boo/CEO/199

Name is Boo Job is CEO Age is 199

---

URL : http://162.243.5.230:8080/person

Hello person !

For more details and advanced methods, please refer to the official Gorilla mux documentation.