incorporate '--json-output' flag to the 'zrok reserve' command (#422)

CHANGELOG.md

@@ -1,5 +1,7 @@
 # v0.4.11
 
+FEATURE: The `zrok reserve` command now incorporates the `--json-output|-j` flag, which outputs the reservation details as JSON, rather than as human-consumable log messages. Other commands will produce similar output in the future (https://github.com/openziti/zrok/issues/422)
+
 FIX: Include `--oauth-provider` and associated flags for the `zrok reserve` command, allowing reserved shares to specify OAuth authentication (https://github.com/openziti/zrok/issues/421)
 
 # v0.4.10

cmd/zrok/reserve.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"encoding/json"
 	"fmt"
 	"github.com/openziti/zrok/environment"
 	"github.com/openziti/zrok/sdk"
@@ -18,6 +19,7 @@ type reserveCommand struct {
 	basicAuth          []string
 	frontendSelection  []string
 	backendMode        string
+	jsonOutput         bool
 	oauthProvider      string
 	oauthEmailDomains  []string
 	oauthCheckInterval time.Duration
@@ -33,7 +35,7 @@ func newReserveCommand() *reserveCommand {
 	command := &reserveCommand{cmd: cmd}
 	cmd.Flags().StringArrayVar(&command.frontendSelection, "frontends", []string{"public"}, "Selected frontends to use for the share")
 	cmd.Flags().StringVarP(&command.backendMode, "backend-mode", "b", "proxy", "The backend mode {proxy, web, <tcpTunnel, udpTunnel>, caddy}")
-
+	cmd.Flags().BoolVarP(&command.jsonOutput, "json-output", "j", false, "Emit JSON describing the created reserved share")
 	cmd.Flags().StringArrayVar(&command.basicAuth, "basic-auth", []string{}, "Basic authentication users (<username:password>,...)")
 	cmd.Flags().StringVar(&command.oauthProvider, "oauth-provider", "", "Enable OAuth provider [google, github]")
 	cmd.Flags().StringArrayVar(&command.oauthEmailDomains, "oauth-email-domains", []string{}, "Allow only these email domains to authenticate via OAuth")
@@ -55,10 +57,7 @@ func (cmd *reserveCommand) run(_ *cobra.Command, args []string) {
 	case "proxy":
 		v, err := parseUrl(args[1])
 		if err != nil {
-			if !panicInstead {
+			tui.Error("invalid target endpoint URL", err)
-				tui.Error("invalid target endpoint URL", err)
-			}
-			panic(err)
 		}
 		target = v
 
@@ -80,10 +79,7 @@ func (cmd *reserveCommand) run(_ *cobra.Command, args []string) {
 
 	env, err := environment.LoadRoot()
 	if err != nil {
-		if !panicInstead {
+		tui.Error("error loading environment", err)
-			tui.Error("error loading environment", err)
-		}
-		panic(err)
 	}
 
 	if !env.IsEnabled() {
@@ -109,14 +105,19 @@ func (cmd *reserveCommand) run(_ *cobra.Command, args []string) {
 	}
 	shr, err := sdk.CreateShare(env, req)
 	if err != nil {
-		if !panicInstead {
+		tui.Error("unable to create share", err)
-			tui.Error("unable to create share", err)
-		}
-		panic(err)
 	}
 
-	logrus.Infof("your reserved share token is '%v'", shr.Token)
+	if !cmd.jsonOutput {
-	for _, fpe := range shr.FrontendEndpoints {
+		logrus.Infof("your reserved share token is '%v'", shr.Token)
-		logrus.Infof("reserved frontend endpoint: %v", fpe)
+		for _, fpe := range shr.FrontendEndpoints {
+			logrus.Infof("reserved frontend endpoint: %v", fpe)
+		}
+	} else {
+		out, err := json.Marshal(shr)
+		if err != nil {
+			tui.Error("error emitting JSON", err)
+		}
+		fmt.Println(string(out))
 	}
 }

sdk/model.go

@@ -31,8 +31,8 @@ type ShareRequest struct {
 }
 
 type Share struct {
-	Token             string
+	Token             string   `json:"token"`
-	FrontendEndpoints []string
+	FrontendEndpoints []string `json:"frontend_endpoints"`
 }
 
 type AccessRequest struct {