Writing a basic HTTP server is easy using the `net/http` package.

package main

import (

	"fmt"

	"net/http"

A fundamental concept in `net/http` servers is *handlers*. A handler is an object implementing the `http.Handler` interface. A common way to write a handler is by using the `http.HandlerFunc` adapter on functions with the appropriate signature.

func hello(w http.ResponseWriter, req *http.Request) {

Functions serving as handlers take a `http.ResponseWriter` and a `http.Request` as arguments. The response writer is used to fill in the HTTP response. Here our simple response is just "hello\n".

	fmt.Fprintf(w, "hello\n")

func headers(w http.ResponseWriter, req *http.Request) {

This handler does something a little more sophisticated by reading all the HTTP request headers and echoing them into the response body.

	for name, headers := range req.Header {

		for _, h := range headers {

			fmt.Fprintf(w, "%v: %v\n", name, h)

func main() {

We register our handlers on server routes using the `http.HandleFunc` convenience function. It sets up the *default router* in the `net/http` package and takes a function as an argument.

	http.HandleFunc("/hello", hello)

	http.HandleFunc("/headers", headers)

Finally, we call the `ListenAndServe` with the port and a handler. `nil` tells it to use the default router we've just set up.

	http.ListenAndServe(":8090", nil)

Writing a basic HTTP server is easy using the `net/http` package.	package main

	import (
	"fmt"
	"net/http"
	)

A fundamental concept in `net/http` servers is handlers. A handler is an object implementing the `http.Handler` interface. A common way to write a handler is by using the `http.HandlerFunc` adapter on functions with the appropriate signature.	func hello(w http.ResponseWriter, req *http.Request) {

Functions serving as handlers take a `http.ResponseWriter` and a `http.Request` as arguments. The response writer is used to fill in the HTTP response. Here our simple response is just "hello\n".	fmt.Fprintf(w, "hello\n")
	}

	func headers(w http.ResponseWriter, req *http.Request) {

This handler does something a little more sophisticated by reading all the HTTP request headers and echoing them into the response body.	for name, headers := range req.Header {
	for _, h := range headers {
	fmt.Fprintf(w, "%v: %v\n", name, h)
	}
	}
	}

	func main() {

We register our handlers on server routes using the `http.HandleFunc` convenience function. It sets up the default router in the `net/http` package and takes a function as an argument.	http.HandleFunc("/hello", hello)
	http.HandleFunc("/headers", headers)

Finally, we call the `ListenAndServe` with the port and a handler. `nil` tells it to use the default router we've just set up.	http.ListenAndServe(":8090", nil)
	}