fix token refresh routine not exit error

internal/command/download.go

@@ -33,6 +33,7 @@ import (
 	"path"
 	"path/filepath"
 	"runtime"
+	"sync/atomic"
 	"time"
 )
 
@@ -226,14 +227,19 @@ func RunDownload(paths []string, options *DownloadOptions) {
 	activeUser.PanClient().ClearCache()
 	defer activeUser.PanClient().DisableCache()
 	// pan token expired checker
-	go func() {
-		for {
+	continueFlag := int32(0)
+	atomic.StoreInt32(&continueFlag, 0)
+	defer func() {
+		atomic.StoreInt32(&continueFlag, 1)
+	}()
+	go func(flag *int32) {
+		for atomic.LoadInt32(flag) == 0 {
 			time.Sleep(time.Duration(1) * time.Minute)
 			if RefreshTokenInNeed(activeUser) {
 				logger.Verboseln("update access token for download task")
 			}
 		}
-	}()
+	}(&continueFlag)
 
 	if options == nil {
 		options = &DownloadOptions{}

internal/command/sync.go

@@ -28,6 +28,7 @@ import (
 	"os"
 	"path"
 	"strings"
+	"sync/atomic"
 	"time"
 )
 
@@ -305,15 +306,20 @@ func RunSync(defaultTask *syncdrive.SyncTask, fileDownloadParallel, fileUploadPa
 	panClient.DisableCache()
 
 	// pan token expired checker
-	go func() {
-		for {
+	continueFlag := int32(0)
+	atomic.StoreInt32(&continueFlag, 0)
+	defer func() {
+		atomic.StoreInt32(&continueFlag, 1)
+	}()
+	go func(flag *int32) {
+		for atomic.LoadInt32(flag) == 0 {
 			time.Sleep(time.Duration(1) * time.Minute)
 			if RefreshTokenInNeed(activeUser) {
 				logger.Verboseln("update access token for sync task")
 				panClient.UpdateToken(activeUser.WebToken)
 			}
 		}
-	}()
+	}(&continueFlag)
 
 	syncFolderRootPath := config.GetSyncDriveDir()
 	if b, e := utils.PathExists(syncFolderRootPath); e == nil {

internal/command/upload.go

@@ -27,6 +27,7 @@ import (
 	"path/filepath"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/tickstep/library-go/logger"
@@ -268,14 +269,19 @@ func RunUpload(localPaths []string, savePath string, opt *UploadOptions) {
 	activeUser.PanClient().ClearCache()
 	defer activeUser.PanClient().DisableCache()
 	// pan token expired checker
-	go func() {
-		for {
+	continueFlag := int32(0)
+	atomic.StoreInt32(&continueFlag, 0)
+	defer func() {
+		atomic.StoreInt32(&continueFlag, 1)
+	}()
+	go func(flag *int32) {
+		for atomic.LoadInt32(flag) == 0 {
 			time.Sleep(time.Duration(1) * time.Minute)
 			if RefreshTokenInNeed(activeUser) {
 				logger.Verboseln("update access token for upload task")
 			}
 		}
-	}()
+	}(&continueFlag)
 
 	if opt == nil {
 		opt = &UploadOptions{}

internal/command/webdav.go

@@ -21,6 +21,7 @@ import (
 	"github.com/tickstep/library-go/logger"
 	"github.com/urfave/cli"
 	"strings"
+	"sync/atomic"
 	"time"
 )
 
@@ -72,8 +73,15 @@ aliyunpan webdav start -h
 						return nil
 					}
 					activeUser := GetActiveUser()
-					go func() {
-						for {
+
+					// pan token expired checker
+					continueFlag := int32(0)
+					atomic.StoreInt32(&continueFlag, 0)
+					defer func() {
+						atomic.StoreInt32(&continueFlag, 1)
+					}()
+					go func(flag *int32) {
+						for atomic.LoadInt32(flag) == 0 {
 							// token刷新
 							time.Sleep(time.Duration(1) * time.Minute)
 							//time.Sleep(time.Duration(5) * time.Second)
@@ -81,7 +89,7 @@ aliyunpan webdav start -h
 								logger.Verboseln("reload new access token for webdav")
 							}
 						}
-					}()
+					}(&continueFlag)
 
 					webdavServ := &webdav.WebdavConfig{
 						PanDriveId:      "",