[cherry-pick] Allow empty path in redirect_url (#20237)

Allow empty path in redirect_url

  fixes #20226

Signed-off-by: stonezdj <daojunz@vmware.com>
Co-authored-by: stonezdj <daojunz@vmware.com>

src/common/utils/utils.go

@@ -313,11 +313,11 @@ func ValidateCronString(cron string) error {
 //	sort.Slice(input, func(i, j int) bool {
 //		return MostMatchSorter(input[i].GroupName, input[j].GroupName, matchWord)
 //	})
+//
 // a is the field to be used for sorting, b is the other field, matchWord is the word to be matched
 // the return value is true if a is less than b
 // for example, search with "user",  input is {"harbor_user", "user", "users, "admin_user"}
 // it returns with this order {"user", "users", "admin_user", "harbor_user"}
-
 func MostMatchSorter(a, b string, matchWord string) bool {
 	// exact match always first
 	if a == matchWord {
@@ -333,7 +333,7 @@ func MostMatchSorter(a, b string, matchWord string) bool {
 	return len(a) < len(b)
 }
 
-// IsLocalPath checks if path is local
+// IsLocalPath checks if path is local, includes the empty path
 func IsLocalPath(path string) bool {
-	return strings.HasPrefix(path, "/") && !strings.HasPrefix(path, "//")
+	return len(path) == 0 || (strings.HasPrefix(path, "/") && !strings.HasPrefix(path, "//"))
 }

src/common/utils/utils_test.go

@@ -501,6 +501,7 @@ func TestIsLocalPath(t *testing.T) {
 		{"other_site1", args{"//www.myexample.com"}, false},
 		{"other_site2", args{"https://www.myexample.com"}, false},
 		{"other_site", args{"http://www.myexample.com"}, false},
+		{"empty_path", args{""}, true},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {