main.go

package main

import (
	"context"
	"log"
	"net/http"
	"time"

	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
	"golang.ngrok.com/ngrok"
	"golang.ngrok.com/ngrok/config"
)

func main() {
	err := run(context.Background())
	if err != nil {
		log.Fatal(err)
	}
}

func helloHandler(c echo.Context) error {
	return c.String(http.StatusOK, "Hello from CloudShell")
}

func run(ctx context.Context) error {
	t, err := ngrok.Listen(
		ctx,
		config.HTTPEndpoint(),
		ngrok.WithAuthtokenFromEnv(),
		ngrok.WithHeartbeatInterval(10*time.Second),
	)
	if err != nil {
		return err
	}

	log.Printf("tunnel created: %s", t.URL())
	e := echo.New()
	e.Use(middleware.Logger())

	e.GET("/", helloHandler)
	return http.Serve(t, e)
}