Example of a reverse proxy written in Go

reverseProxy.go

import (
    "net/http"
    "net/http/httputil"
    "net/url"
    "fmt"
)
 
func main() { 
    // New functionality written in Go
    http.HandleFunc("/new", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprint(w, "New function")
    })
 
    // Anything we don't do in Go, we pass to the old platform
    u, _ := url.Parse("http://old.mydomain/")
    http.Handle("/", httputil.NewSingleHostReverseProxy(u))
 
    // Start the server
    http.ListenAndServe(":8080", nil)
}