[FIXED] How to get "virtualhost" functionality in Go?

Issue

With Nginx/Django create virtualhosts is as easy as to write appropriate config.

For Go I found this https://codereview.appspot.com/4070043 and I understand that I have to use ServeMux but how to implement it?

I mean I must have 1 binary for all projects or I have to create some "router" server which will route requests depending on hostname? How to do it "Go"-way?

Solution

You are correct that you will use the ServeMux. The godoc for ServeMux has some detailed information about how to use it.

In the standard http package, there is the DefaultServeMux which can be manipulated using the top-level Handle functions. For example, a simple virtual host application might look like:

package main

import (
    "fmt"
    "net/http"
)

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "Hello, world!")
    })
    http.HandleFunc("qa.example.com/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "Hello, improved world!")
    })
    http.ListenAndServe(":8080", nil)
}

In this example, all requests to qa.example.com will hit the second handler, and all requests to other hosts will hit the first handler.

Answered By - Kyle Lemons

Answer Checked By - Candace Johnson (PHPFixing Volunteer)