QR code generation to terminal

cli/jprqc.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"github.com/azimjohn/jprq/cli/debugger"
+	qr_coder "github.com/azimjohn/jprq/cli/utils"
 	"github.com/azimjohn/jprq/server/events"
 	"github.com/azimjohn/jprq/server/tunnel"
 )
@@ -23,7 +24,7 @@ type jprqClient struct {
 	httpDebugger debugger.Debugger
 }
 
-func (j *jprqClient) Start(port int, debug bool) {
+func (j *jprqClient) Start(port int, debug bool, gen_qe bool) {
 	eventCon, err := net.Dial("tcp", j.config.Remote.Events)
 	if err != nil {
 		log.Fatalf("failed to connect to event server: %s\n", err)
@@ -62,6 +63,10 @@ func (j *jprqClient) Start(port int, debug bool) {
 	fmt.Printf("Status: \t Online \n")
 	fmt.Printf("Protocol: \t %s \n", strings.ToUpper(j.protocol))
 	fmt.Printf("Forwarded: \t %s -> %s \n", strings.TrimSuffix(j.publicServer, ":80"), j.localServer)
+	if gen_qe {
+		fmt.Println("Qr Code:")
+		qr_coder.GenerateQRStr(j.publicServer)
+	}
 
 	if j.protocol == "http" && debug {
 		j.httpDebugger = debugger.New()

cli/main.go

@@ -18,6 +18,7 @@ type Flags struct {
 	debug     bool
 	cname     string
 	subdomain string
+	qr        bool
 }
 
 func printVersion() {
@@ -26,7 +27,7 @@ func printVersion() {
 }
 
 func printHelp() {
-	fmt.Printf("Usage: jprq <command> [arguments]\n\n")
+	fmt.Printf("Usage: jprq <command> [arguments] [flags]\n\n")
 	fmt.Println("Commands:")
 	fmt.Println("  auth  <token>               Set authentication token from jprq.io/auth")
 	fmt.Println("  tcp   <port>                Start a TCP tunnel on the specified port")
@@ -36,6 +37,7 @@ func printHelp() {
 	fmt.Println("  serve <dir>                 Serve files with built-in Http Server")
 	fmt.Println("  --help                      Show this help message")
 	fmt.Println("  --version                   Show the version number")
+	fmt.Println("  --qr                        Generate QR code for public URL")
 	os.Exit(0)
 }
 
@@ -93,7 +95,7 @@ func main() {
 		cname:     flags.cname,
 	}
 
-	go client.Start(port, flags.debug)
+	go client.Start(port, flags.debug, flags.qr)
 
 	signalChan := make(chan os.Signal, 1)
 	signal.Notify(signalChan, os.Interrupt)
@@ -110,6 +112,8 @@ func parseFlags(args []string) Flags {
 			flags.subdomain = args[i+1]
 		case "-c", "-cname", "--cname":
 			flags.cname = args[i+1]
+		case "--qr", "--share-qr":
+			flags.qr = true
 		}
 	}
 	return flags

cli/utils/qr_coder.go

@@ -0,0 +1,20 @@
+package qr_coder
+
+import (
+	"fmt"
+
+	qrcode "github.com/skip2/go-qrcode"
+)
+
+func GenerateQRStr(content string) error {
+
+	q, err := qrcode.New(content, qrcode.Medium)
+	if err != nil {
+		fmt.Printf("\033[38;5;208mError: could not generate QRCode: %v\033[0m\n", err) // color is orange
+		return err
+	}
+	fmt.Println(q.ToSmallString(false))
+	fmt.Println()
+	return nil
+
+}

go.mod

@@ -1,8 +1,11 @@
 module github.com/azimjohn/jprq
 
-go 1.22
+go 1.23.0
+
+toolchain go1.23.4
 
 require (
 	github.com/djherbis/buffer v1.2.0
 	github.com/djherbis/nio/v3 v3.0.1
+	github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e
 )

go.sum

@@ -3,3 +3,5 @@ github.com/djherbis/buffer v1.2.0 h1:PH5Dd2ss0C7CRRhQCZ2u7MssF+No9ide8Ye71nPHcrQ
 github.com/djherbis/buffer v1.2.0/go.mod h1:fjnebbZjCUpPinBRD+TDwXSOeNQ7fPQWLfGQqiAiUyE=
 github.com/djherbis/nio/v3 v3.0.1 h1:6wxhnuppteMa6RHA4L81Dq7ThkZH8SwnDzXDYy95vB4=
 github.com/djherbis/nio/v3 v3.0.1/go.mod h1:Ng4h80pbZFMla1yKzm61cF0tqqilXZYrogmWgZxOcmg=
+github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e h1:MRM5ITcdelLK2j1vwZ3Je0FKVCfqOLp5zO6trqMLYs0=
+github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e/go.mod h1:XV66xRDqSt+GTGFMVlhk3ULuV0y9ZmzeVGR4mloJI3M=