diff --git a/server/check.go b/server/check.go
index a1024807..399211a0 100644
--- a/server/check.go
+++ b/server/check.go
@@ -8,7 +8,6 @@ import (
 	"github.com/gin-gonic/gin"
 	log "github.com/sirupsen/logrus"
 	"gorm.io/gorm"
-	"path/filepath"
 )
 
 func Auth(c *gin.Context) {
@@ -52,7 +51,7 @@ func CheckParent(path string, password string) bool {
 		if path == "/" || path == "\\" {
 			return true
 		}
-		return CheckParent(filepath.Dir(path), password)
+		return CheckParent(utils.Dir(path), password)
 	}
 }
 
@@ -75,6 +74,6 @@ func CheckDownLink(path string, passwordMd5 string) bool {
 		if path == "/" || path == "\\" {
 			return true
 		}
-		return CheckDownLink(filepath.Dir(path), passwordMd5)
+		return CheckDownLink(utils.Dir(path), passwordMd5)
 	}
 }
diff --git a/server/down.go b/server/down.go
index bb27396e..bf46e201 100644
--- a/server/down.go
+++ b/server/down.go
@@ -18,7 +18,7 @@ func Down(c *gin.Context) {
 	rawPath = utils.ParsePath(rawPath)
 	log.Debugf("down: %s", rawPath)
 	pw := c.Query("pw")
-	if !CheckDownLink(filepath.Dir(rawPath), pw) {
+	if !CheckDownLink(utils.Dir(rawPath), pw) {
 		ErrorResp(c, fmt.Errorf("wrong password"), 401)
 		return
 	}
@@ -50,7 +50,7 @@ func Proxy(c *gin.Context) {
 	rawPath = utils.ParsePath(rawPath)
 	log.Debugf("proxy: %s", rawPath)
 	pw := c.Query("pw")
-	if !CheckDownLink(filepath.Dir(rawPath), pw) {
+	if !CheckDownLink(utils.Dir(rawPath), pw) {
 		ErrorResp(c, fmt.Errorf("wrong password"), 401)
 		return
 	}
diff --git a/server/path.go b/server/path.go
index 1fb2f295..f68a0ce3 100644
--- a/server/path.go
+++ b/server/path.go
@@ -7,7 +7,6 @@ import (
 	"github.com/Xhofe/alist/utils"
 	"github.com/gin-gonic/gin"
 	log "github.com/sirupsen/logrus"
-	"path/filepath"
 	"strings"
 )
 
@@ -32,7 +31,7 @@ func Path(c *gin.Context) {
 		}
 		// TODO hide or ignore?
 	} else if conf.CheckParent {
-		if !CheckParent(filepath.Dir(req.Path), req.Password) {
+		if !CheckParent(utils.Dir(req.Path), req.Password) {
 			ErrorResp(c, fmt.Errorf("wrong password"), 401)
 			return
 		}
diff --git a/server/webdav/file.go b/server/webdav/file.go
index 230b388f..efee9226 100644
--- a/server/webdav/file.go
+++ b/server/webdav/file.go
@@ -97,7 +97,7 @@ func GetPW(path string) string {
 		if path == "/" || path == "\\" {
 			return ""
 		}
-		return GetPW(filepath.Dir(path))
+		return GetPW(utils.Dir(path))
 	}
 }
 
@@ -119,7 +119,7 @@ func (fs *FileSystem) Link(r *http.Request, rawPath string) (string, error) {
 	if driver.Config().OnlyProxy || account.WebdavProxy {
 		link = fmt.Sprintf("%s://%s/p%s", protocol, r.Host, rawPath)
 		if conf.CheckDown {
-			pw := GetPW(filepath.Dir(rawPath))
+			pw := GetPW(utils.Dir(rawPath))
 			link += "?pw" + pw
 		}
 	} else {
diff --git a/utils/file.go b/utils/file.go
index ef531ff6..170b1974 100644
--- a/utils/file.go
+++ b/utils/file.go
@@ -94,4 +94,10 @@ func RemoveLastSlash(path string) string {
 		return strings.TrimSuffix(path, "/")
 	}
 	return path
+}
+
+func Dir(path string) string {
+	path = ParsePath(path)
+	idx := strings.LastIndex(path, "/")
+	return path[:idx]
 }
\ No newline at end of file