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
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+4.3k Golang : Issue HTTP commands to server and port example
+8.4k Golang : Launch Mac OS X Preview (or other OS) application from your program example
+10.1k Google Maps URL parameters configuration
+14.8k Golang : How to check if input from os.Args is integer?
+17.9k Golang : Clearing slice
+7.8k Golang : Capture text return from exec function example
+7.4k Golang : Implementing class(object-oriented programming style)
+8.8k Golang : Function wrapper that takes arguments and return result example
+9.7k Golang : Fix - does not implement sort.Interface (missing Len method)
+3.9k PHP : Extract part of a string starting from the middle
+14.9k Golang : convert string or integer to big.Int type
+9.7k PHP : Convert(cast) bigInt to string