gorem お試しサンプル https://github.com/mattn/gorem

bar.go

package main

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

func main() {
	http.HandleFunc("/", rootBarHandle)
	http.HandleFunc("/app/bar/barhandle", barHandle)

	http.ListenAndServe(":5004", nil)
}

func rootBarHandle(w http.ResponseWriter, r *http.Request) {
	log.Println("rootBarHandle")
	fmt.Fprintln(w, "rootBar")
}

func barHandle(w http.ResponseWriter, r *http.Request) {
	log.Println("barHandle")
	fmt.Fprintln(w, "barHandle")
}

config.json

{
	"kwmt": {
		"address": "127.0.0.1:5000",
		"root": "/app/",
		"entries": [
			{ "path": "/foo", "backend": "http://localhost:5003" },
			{ "path": "/bar", "backend": "http://localhost:5004", "use_path": true },
			{ "path": "/baz", "backend": "./static" }
		]
	}
}

foo.go

package main

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

func main() {
	http.HandleFunc("/", rootFooHandle)
	http.HandleFunc("/foohandle", fooHandle)

	http.ListenAndServe(":5003", nil)
}

func rootFooHandle(w http.ResponseWriter, r *http.Request) {
	log.Println("rootFooHandle")
	fmt.Fprintln(w, "rootFooHandle")
}

func fooHandle(w http.ResponseWriter, r *http.Request) {
	log.Println("fooHandle")
	fmt.Fprintln(w, "fooHandle")
}