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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
package main
import (
"context"
"errors"
"fmt"
"log"
"net/url"
"os"
tunnels "github.com/microsoft/dev-tunnels/go/tunnels"
)
// Set the tunnelId and cluster Id for the tunnels you want to connect to
const (
tunnelId = ""
clusterId = "usw2"
)
var (
uri = tunnels.ServiceProperties.ServiceURI
userAgent = []tunnels.UserAgent{{Name: "Tunnels-Go-SDK-Example", Version: "0.0.1"}}
ctx = context.Background()
)
// Put your tunnels access token in the return statement or set the TUNNELS_TOKEN env variable
func getAccessToken() string {
if token := os.Getenv("TUNNELS_TOKEN"); token != "" {
return token
}
return ""
}
func main() {
logger := log.New(os.Stdout, "", log.LstdFlags)
url, err := url.Parse(uri)
if err != nil {
fmt.Println(fmt.Errorf(err.Error()))
return
}
// create manager to get tunnel
managementClient, err := tunnels.NewManager(userAgent, getAccessToken, url, nil)
if err != nil {
fmt.Println(fmt.Errorf(err.Error()))
return
}
limits, err := managementClient.ListUserLimits(ctx)
if err != nil {
fmt.Println(fmt.Errorf(err.Error()))
return
}
logger.Printf("Successfully retrieved %d user limit(s)", len(limits))
// set up options to request a connect token
options := &tunnels.TunnelRequestOptions{IncludePorts: true, TokenScopes: []tunnels.TunnelAccessScope{"connect"}}
newTunnel := &tunnels.Tunnel{
TunnelID: tunnelId,
ClusterID: clusterId,
}
// get tunnel for connection
getTunnel, err := managementClient.GetTunnel(ctx, newTunnel, options)
if err != nil {
fmt.Println(fmt.Errorf(err.Error()))
return
}
if getTunnel.TunnelID == "" {
fmt.Println(fmt.Errorf(err.Error()))
return
} else {
logger.Printf(fmt.Sprintf("Got tunnel with id %s", getTunnel.TunnelID))
}
// create channels for errors and listeners
done := make(chan error)
go func() {
// start client connection to tunnel
c, err := tunnels.NewClient(logger, getTunnel, true)
c.Connect(ctx, "")
if err != nil {
done <- fmt.Errorf("connect failed: %v", err)
return
}
if c == nil {
done <- errors.New("nil connection")
return
}
}()
for {
select {
case err := <-done:
if err != nil {
fmt.Println(fmt.Errorf(err.Error()))
}
return
case <-ctx.Done():
return
}
}
}
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