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 :
See also : Golang : Pat multiplexer routing example
By Adam Ng
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