Golang : Multiplexer with net/http and map
This is additional tutorial on multiplexer, with just net/http
package and a map.
A multiplexer allows you to route to different function or handler based on the URL's path.
For example :
"/someresource/:id" ---> "code to do something with the resource"
"/users/:name/profile" ---> "code to do something with the profile"
This tutorial is similar to the previous tutorial on multiplexer with NewServeMux()
function, but it uses a map instead.
package main
import "net/http"
type home struct{}
func (h home) ServeHTTP(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("Hello, World!"))
}
type page struct {
body string
}
func (p page) ServeHTTP(w http.ResponseWriter, r *http.Request) {
// echo back the page first URI
w.Write([]byte(p.body))
}
// use map instead
type multiplexer map[string]http.Handler
func (m multiplexer) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if handler, ok := m[r.RequestURI]; ok {
handler.ServeHTTP(w, r)
} else {
w.WriteHeader(http.StatusNotFound)
}
}
var mux = multiplexer{
"/": home{},
"/references/": page{"references"},
"/tutorials/": page{"tutorials"},
}
func main() {
http.ListenAndServe(":8080", mux)
}
See also : Golang : Gorilla mux routing example
By Adam Ng
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