From c195f182295376cb3cb6714562835d755951c007 Mon Sep 17 00:00:00 2001
From: ExplodingDragon <explodingfkl@gmail.com>
Date: Tue, 25 Nov 2025 20:36:36 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E9=87=8D=E5=AE=9A=E5=90=91?=
 =?UTF-8?q?=E9=97=AE=E9=A2=98?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 pkg/filters/direct.go   | 36 +++++++++++++++++++-----------------
 pkg/filters/template.go |  3 ---
 tests/core_test.go      |  6 ++++++
 3 files changed, 25 insertions(+), 20 deletions(-)

diff --git a/pkg/filters/direct.go b/pkg/filters/direct.go
index 6208448..01ebb2d 100644
--- a/pkg/filters/direct.go
+++ b/pkg/filters/direct.go
@@ -32,24 +32,26 @@ func FilterInstDirect(_ core.Params) (core.FilterInstance, error) {
 				http.Error(writer, "Method not allowed", http.StatusMethodNotAllowed)
 				return nil
 			}
-			var resp *http.Response
-			var path string
-			defaultPath := param.Prefix + strings.TrimSuffix(ctx.Path, "/")
-			for _, p := range []string{defaultPath, defaultPath + "/index.html"} {
-				zap.L().Debug("direct fetch", zap.String("path", p))
-				resp, err = ctx.NativeOpen(request.Context(), p, nil)
-				if err != nil {
-					if resp != nil {
-						resp.Body.Close()
-					}
-					if !errors.Is(err, os.ErrNotExist) {
-						zap.L().Debug("error", zap.Any("error", err))
-						return err
-					}
-					continue
+			path := param.Prefix + strings.TrimSuffix(ctx.Path, "/")
+			zap.L().Debug("direct fetch", zap.String("path", path))
+			resp, err := ctx.NativeOpen(request.Context(), path, nil)
+			if err != nil {
+				if resp != nil {
+					resp.Body.Close()
 				}
-				path = p
-				break
+				if !errors.Is(err, os.ErrNotExist) {
+					zap.L().Debug("error", zap.Any("error", err))
+					return err
+				}
+				exists, e := ctx.Exists(ctx, path+"/index.html")
+				if e != nil {
+					return err
+				}
+				if exists {
+					http.Redirect(writer, request, strings.TrimSuffix(request.URL.Path, "/")+"/", http.StatusFound)
+					return nil
+				}
+				return err
 			}
 			if resp == nil {
 				return os.ErrNotExist
diff --git a/pkg/filters/template.go b/pkg/filters/template.go
index b007dc7..9dc823b 100644
--- a/pkg/filters/template.go
+++ b/pkg/filters/template.go
@@ -23,9 +23,6 @@ func FilterInstTemplate(_ core.Params) (core.FilterInstance, error) {
 			if err != nil {
 				return err
 			}
-			if err != nil {
-				return err
-			}
 			out := &bytes.Buffer{}
 			parse, err := utils.NewTemplate().Funcs(map[string]any{
 				"load": func(path string) (any, error) {
diff --git a/tests/core_test.go b/tests/core_test.go
index b3e321f..2074049 100644
--- a/tests/core_test.go
+++ b/tests/core_test.go
@@ -94,6 +94,12 @@ func Test_fail_back(t *testing.T) {
 		server.AddFile("org1/org1.example.com/gh-pages/index.html", "hello world 1")
 		server.AddFile("org1/org1.example.com/gh-pages/child/index.html", "hello world 2")
 		server.AddFile("org1/child/gh-pages/no.html", "hello world 3")
+
+		_, resp, err := server.OpenFile("https://org1.example.com/child")
+		assert.NoError(t, err)
+		assert.Equal(t, 302, resp.StatusCode)
+		assert.Equal(t, "/child/", resp.Header.Get("Location"))
+
 		data, _, err := server.OpenFile("https://org1.example.com/child/")
 		assert.NoError(t, err)
 		assert.Equal(t, "hello world 2", string(data))