Golang : Routes multiplexer routing example with regular expression control

This is another Golang's multiplexer example that is worthy to know about. Routes - it has a similar interface to Pat, but you can add additional control with Regular Expressions.

Such as :

 mx.Get("/:name([a-z]+)", http.HandlerFunc(ReplyNameRoutes))

Run this code example below and try to enter a username with capital letters. Because the regular expression dictates that the input from URL's path must be small cap, therefore it will show error 404.

 package main

 import (
 "fmt"
 "github.com/drone/routes"
 "net/http"
 )

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

 func ReplyNameRoutes(w http.ResponseWriter, r *http.Request) {
 parameters := r.URL.Query()
 name := parameters.Get(":name")
 w.Write([]byte(fmt.Sprintf("Hello %s !", name)))
 }

 func main() {
 mx := routes.New()
 mx.Get("/", http.HandlerFunc(SayHelloWorld))
 mx.Get("/:name([a-z]+)", http.HandlerFunc(ReplyNameRoutes))

 http.Handle("/", mx)
 http.ListenAndServe(":8080", nil)
 }

Sample output :

http://localhost:8080/adam

Hello adam!

http://localhost:8080/Adam

404 page not found

Reference :

https://github.com/drone/routes