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
+9.4k Golang : How to unmarshal JSON inner/nested value and assign to specific struct?
+10.2k Golang : Display a text file line by line with line number example
+23.3k Golang : Create PDF file from HTML file
+16k Golang : Multi threading or run two processes or more example
+3.7k MariaDB/MySQL : How to get version information
+30.3k Golang : Copy directory - including sub-directories and files
+8.1k Golang : Generate Codabar
+6.3k Golang : Check to see if *File is a file or directory
+13.9k Golang : Get digits from integer before and after given position example
+9.8k Golang : Natural string sorting example
+18k Mac OSX : Homebrew and Golang
+17.6k Golang : When to use public and private identifier(variable) and how to make the identifier public or private?