dynamic the port, so that you could open multiple software to serve d…

…ifferent folders

Tools.sh

@@ -19,6 +19,7 @@ build() {
     #go get github.com/gobuffalo/packr/v2/...
     go get github.com/GeertJohan/go.rice
     go get github.com/GeertJohan/go.rice/rice
+    go get github.com/skip2/go-qrcode/...
 
     cd ..
     cd src

client/src/Const.js

@@ -1,8 +1,11 @@
 var expected_host = ""
+/*
 if (window.location.port != '5000') {
     expected_host = window.location.protocol + "//" + window.location.hostname + (window.location.port ? ':' + '5000': '') + "/"
 } else {
     expected_host = window.location.protocol + "//" + window.location.hostname + (window.location.port ? ':' + window.location.port: '') + "/"
 }
+*/
+expected_host = window.location.protocol + "//" + window.location.hostname + (window.location.port ? ':' + window.location.port: '') + "/"
 
 export const HOST = expected_host

src/go.sum

@@ -63,6 +63,8 @@ github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lN
 github.com/nkovacs/streamquote v0.0.0-20170412213628-49af9bddb229 h1:E2B8qYyeSgv5MXpmzZXRNp8IAQ4vjxIjhpAf5hv/tAg=
 github.com/nkovacs/streamquote v0.0.0-20170412213628-49af9bddb229/go.mod h1:0aYXnNPJ8l7uZxf45rWW1a/uME32OF0rhiYGNQ2oF2E=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+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=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=

src/main.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"os/exec"
 	"runtime"
+	"strconv"
 	"strings"
 	"time"
 
@@ -32,6 +33,21 @@ func openBrowser(url string) {
 	}
 }
 
+func findAvailablePort(port int) string {
+	for true {
+		postStr := strconv.Itoa(port)
+		connection, err := net.Listen("tcp", ":"+postStr)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Can't listen on port %q: %s", port, err)
+			port += 1
+		} else {
+			connection.Close()
+			break
+		}
+	}
+	return strconv.Itoa(port)
+}
+
 func main() {
 	// get cli args
 	dir, _ := os.Getwd()
@@ -82,6 +98,7 @@ func main() {
 			c.JSON(http.StatusOK, file_dict)
 			runtime.GC()
 		})
+
 	}
 
 	local_address := "127.0.0.1"
@@ -99,7 +116,9 @@ func main() {
 		}
 	}
 
-	var target_url = "http://" + local_address + ":5000/ui"
+	port := findAvailablePort(5000)
+
+	var target_url = "http://" + local_address + ":" + port + "/ui"
 	go func() {
 		fmt.Printf("\n\n-------------------------------\n\n")
 
@@ -117,17 +136,17 @@ func main() {
 	}()
 
 	// Start and run the server
-	router.Run(":5000")
+	router.Run(":" + port)
 
 	/*
-	s := &http.Server{
-		Addr:           ":5000",
-		Handler:        router,
-		ReadTimeout:    1 * time.Second,
-		WriteTimeout:   1 * time.Second,
-		IdleTimeout:    1 * time.Second,
-		MaxHeaderBytes: 1 << 20,
-	}
-	s.ListenAndServe()
+		s := &http.Server{
+			Addr:           ":5000",
+			Handler:        router,
+			ReadTimeout:    1 * time.Second,
+			WriteTimeout:   1 * time.Second,
+			IdleTimeout:    1 * time.Second,
+			MaxHeaderBytes: 1 << 20,
+		}
+		s.ListenAndServe()
 	*/
 }