redirect.go

package main

import (
	"log"
	"net/http"
	"strings"
)

func RedirectHandler(code int) http.Handler {
	return &redirectHandler{code}
}

// Redirect to a fixed URL
type redirectHandler struct {
	code int
}

func (rh *redirectHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	u := *r.URL
	if strings.HasPrefix(r.URL.Path, "/bucket1") {
		u.Host = "m3.minio.io:9001"
		http.Redirect(w, r, u.String(), rh.code)
	} else if strings.HasPrefix(r.URL.Path, "/bucket2") {
		u.Host = "m3.minio.io:9002"
		http.Redirect(w, r, u.String(), rh.code)
	}
}

func main() {
	log.Println("Listening on 0.0.0.0:9000")
	log.Fatalln(http.ListenAndServe(":9000", RedirectHandler(301)))
}