diff --git a/middleware/frontend.go b/middleware/frontend.go
index 7fb7606..551a209 100644
--- a/middleware/frontend.go
+++ b/middleware/frontend.go
@@ -39,13 +39,13 @@ func FrontendFileHandler() gin.HandlerFunc {
 		path := c.Request.URL.Path
 
 		// API 跳过
-		if strings.HasPrefix(path, "/api") || strings.HasPrefix(path, "/custom") || strings.HasPrefix(path, "/custom") || path == "manifest.json" {
+		if strings.HasPrefix(path, "/api") || strings.HasPrefix(path, "/custom") || strings.HasPrefix(path, "/dav") || path == "/manifest.json" {
 			c.Next()
 			return
 		}
 
 		// 不存在的路径和index.html均返回index.html
-		if !bootstrap.StaticFS.Exists("/", path) || (path == "/index.html") || (path == "/") {
+		if (path == "/index.html") || (path == "/") || !bootstrap.StaticFS.Exists("/", path) {
 			// 读取、替换站点设置
 			options := model.GetSettingByNames("siteName", "siteKeywords", "siteScript",
 				"pwa_small_icon")
diff --git a/middleware/frontend_test.go b/middleware/frontend_test.go
new file mode 100644
index 0000000..d32529d
--- /dev/null
+++ b/middleware/frontend_test.go
@@ -0,0 +1,144 @@
+package middleware
+
+import (
+	"errors"
+	"github.com/cloudreve/Cloudreve/v3/bootstrap"
+	"github.com/cloudreve/Cloudreve/v3/pkg/cache"
+	"github.com/cloudreve/Cloudreve/v3/pkg/util"
+	"github.com/gin-gonic/gin"
+	"github.com/stretchr/testify/assert"
+	testMock "github.com/stretchr/testify/mock"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"testing"
+)
+
+type StaticMock struct {
+	testMock.Mock
+}
+
+func (m StaticMock) Open(name string) (http.File, error) {
+	args := m.Called(name)
+	return args.Get(0).(http.File), args.Error(1)
+}
+
+func (m StaticMock) Exists(prefix string, filepath string) bool {
+	args := m.Called(prefix, filepath)
+	return args.Bool(0)
+}
+
+func TestFrontendFileHandler(t *testing.T) {
+	asserts := assert.New(t)
+	rec := httptest.NewRecorder()
+
+	// 静态资源未加载
+	{
+		TestFunc := FrontendFileHandler()
+
+		c, _ := gin.CreateTestContext(rec)
+		c.Params = []gin.Param{}
+		c.Request, _ = http.NewRequest("GET", "/", nil)
+		TestFunc(c)
+		asserts.False(c.IsAborted())
+	}
+
+	// index.html 不存在
+	{
+		testStatic := &StaticMock{}
+		bootstrap.StaticFS = testStatic
+		testStatic.On("Open", "/index.html").
+			Return(&os.File{}, errors.New("error"))
+		TestFunc := FrontendFileHandler()
+
+		c, _ := gin.CreateTestContext(rec)
+		c.Params = []gin.Param{}
+		c.Request, _ = http.NewRequest("GET", "/", nil)
+		TestFunc(c)
+		asserts.False(c.IsAborted())
+	}
+
+	// index.html 读取失败
+	{
+		file, _ := util.CreatNestedFile("tests/index.html")
+		file.Close()
+		testStatic := &StaticMock{}
+		bootstrap.StaticFS = testStatic
+		testStatic.On("Open", "/index.html").
+			Return(file, nil)
+		TestFunc := FrontendFileHandler()
+
+		c, _ := gin.CreateTestContext(rec)
+		c.Params = []gin.Param{}
+		c.Request, _ = http.NewRequest("GET", "/", nil)
+		TestFunc(c)
+		asserts.False(c.IsAborted())
+	}
+
+	// 成功且命中
+	{
+		file, _ := util.CreatNestedFile("tests/index.html")
+		defer file.Close()
+		testStatic := &StaticMock{}
+		bootstrap.StaticFS = testStatic
+		testStatic.On("Open", "/index.html").
+			Return(file, nil)
+		TestFunc := FrontendFileHandler()
+
+		c, _ := gin.CreateTestContext(rec)
+		c.Params = []gin.Param{}
+		c.Request, _ = http.NewRequest("GET", "/", nil)
+
+		cache.Set("setting_siteName", "cloudreve", 0)
+		cache.Set("setting_siteKeywords", "cloudreve", 0)
+		cache.Set("setting_siteScript", "cloudreve", 0)
+		cache.Set("setting_pwa_small_icon", "cloudreve", 0)
+
+		TestFunc(c)
+		asserts.True(c.IsAborted())
+	}
+
+	// 成功且命中静态文件
+	{
+		file, _ := util.CreatNestedFile("tests/index.html")
+		defer file.Close()
+		testStatic := &StaticMock{}
+		bootstrap.StaticFS = testStatic
+		testStatic.On("Open", "/index.html").
+			Return(file, nil)
+		testStatic.On("Exists", "/", "/2").
+			Return(true)
+		testStatic.On("Open", "/2").
+			Return(file, nil)
+		TestFunc := FrontendFileHandler()
+
+		c, _ := gin.CreateTestContext(rec)
+		c.Params = []gin.Param{}
+		c.Request, _ = http.NewRequest("GET", "/2", nil)
+
+		TestFunc(c)
+		asserts.True(c.IsAborted())
+		testStatic.AssertExpectations(t)
+	}
+
+	// API 相关跳过
+	{
+		for _, reqPath := range []string{"/api/user", "/manifest.json", "/dav/path"} {
+			file, _ := util.CreatNestedFile("tests/index.html")
+			defer file.Close()
+			testStatic := &StaticMock{}
+			bootstrap.StaticFS = testStatic
+			testStatic.On("Open", "/index.html").
+				Return(file, nil)
+			TestFunc := FrontendFileHandler()
+
+			c, _ := gin.CreateTestContext(rec)
+			c.Params = []gin.Param{}
+			c.Request, _ = http.NewRequest("GET", reqPath, nil)
+
+			TestFunc(c)
+			asserts.False(c.IsAborted())
+		}
+	}
+
+}
diff --git a/middleware/option.go b/middleware/option.go
index 6704bcf..daa3753 100644
--- a/middleware/option.go
+++ b/middleware/option.go
@@ -1,13 +1,9 @@
 package middleware
 
 import (
-	"io/ioutil"
-
-	"github.com/cloudreve/Cloudreve/v3/bootstrap"
 	model "github.com/cloudreve/Cloudreve/v3/models"
 	"github.com/cloudreve/Cloudreve/v3/pkg/hashid"
 	"github.com/cloudreve/Cloudreve/v3/pkg/serializer"
-	"github.com/cloudreve/Cloudreve/v3/pkg/util"
 	"github.com/gin-gonic/gin"
 )
 
@@ -42,47 +38,3 @@ func IsFunctionEnabled(key string) gin.HandlerFunc {
 		c.Next()
 	}
 }
-
-// InjectSiteInfo 向首页html中插入站点信息
-func InjectSiteInfo() gin.HandlerFunc {
-	ignoreFunc := func(c *gin.Context) {
-		c.Next()
-	}
-	if bootstrap.StaticFS == nil {
-		return ignoreFunc
-	}
-
-	// 读取index.html
-	file, err := bootstrap.StaticFS.Open("/index.html")
-	if err != nil {
-		util.Log().Warning("静态文件[index.html]不存在，可能会影响首页展示")
-		return ignoreFunc
-	}
-
-	fileContentBytes, err := ioutil.ReadAll(file)
-	if err != nil {
-		util.Log().Warning("静态文件[index.html]读取失败，可能会影响首页展示")
-		return ignoreFunc
-	}
-	fileContent := string(fileContentBytes)
-
-	return func(c *gin.Context) {
-		if c.Request.URL.Path == "/" || c.Request.URL.Path == "/index.html" {
-			// 读取、替换站点设置
-			options := model.GetSettingByNames("siteName", "siteKeywords", "siteScript",
-				"pwa_small_icon")
-			finalHTML := util.Replace(map[string]string{
-				"{siteName}":       options["siteName"],
-				"{siteDes}":        options["siteDes"],
-				"{siteScript}":     options["siteScript"],
-				"{pwa_small_icon}": options["pwa_small_icon"],
-			}, fileContent)
-
-			c.Header("Content-Type", "text/html")
-			c.String(200, finalHTML)
-			c.Abort()
-			return
-		}
-		c.Next()
-	}
-}
diff --git a/middleware/option_test.go b/middleware/option_test.go
index 512c2e8..5de824a 100644
--- a/middleware/option_test.go
+++ b/middleware/option_test.go
@@ -1,19 +1,14 @@
 package middleware
 
 import (
-	"errors"
 	"net/http"
 	"net/http/httptest"
-	"os"
 	"testing"
 
-	"github.com/cloudreve/Cloudreve/v3/bootstrap"
 	"github.com/cloudreve/Cloudreve/v3/pkg/cache"
 	"github.com/cloudreve/Cloudreve/v3/pkg/hashid"
-	"github.com/cloudreve/Cloudreve/v3/pkg/util"
 	"github.com/gin-gonic/gin"
 	"github.com/stretchr/testify/assert"
-	testMock "github.com/stretchr/testify/mock"
 )
 
 func TestHashID(t *testing.T) {
@@ -81,107 +76,3 @@ func TestIsFunctionEnabled(t *testing.T) {
 	}
 
 }
-
-type StaticMock struct {
-	testMock.Mock
-}
-
-func (m StaticMock) Open(name string) (http.File, error) {
-	args := m.Called(name)
-	return args.Get(0).(http.File), args.Error(1)
-}
-
-func (m StaticMock) Exists(prefix string, filepath string) bool {
-	args := m.Called(prefix, filepath)
-	return args.Bool(0)
-}
-
-func TestInjectSiteInfo(t *testing.T) {
-	asserts := assert.New(t)
-	rec := httptest.NewRecorder()
-
-	// 静态资源未加载
-	{
-		TestFunc := InjectSiteInfo()
-
-		c, _ := gin.CreateTestContext(rec)
-		c.Params = []gin.Param{}
-		c.Request, _ = http.NewRequest("GET", "/", nil)
-		TestFunc(c)
-		asserts.False(c.IsAborted())
-	}
-
-	// index.html 不存在
-	{
-		testStatic := &StaticMock{}
-		bootstrap.StaticFS = testStatic
-		testStatic.On("Open", "/index.html").
-			Return(&os.File{}, errors.New("error"))
-		TestFunc := InjectSiteInfo()
-
-		c, _ := gin.CreateTestContext(rec)
-		c.Params = []gin.Param{}
-		c.Request, _ = http.NewRequest("GET", "/", nil)
-		TestFunc(c)
-		asserts.False(c.IsAborted())
-	}
-
-	// index.html 读取失败
-	{
-		file, _ := util.CreatNestedFile("tests/index.html")
-		file.Close()
-		testStatic := &StaticMock{}
-		bootstrap.StaticFS = testStatic
-		testStatic.On("Open", "/index.html").
-			Return(file, nil)
-		TestFunc := InjectSiteInfo()
-
-		c, _ := gin.CreateTestContext(rec)
-		c.Params = []gin.Param{}
-		c.Request, _ = http.NewRequest("GET", "/", nil)
-		TestFunc(c)
-		asserts.False(c.IsAborted())
-	}
-
-	// 成功且命中
-	{
-		file, _ := util.CreatNestedFile("tests/index.html")
-		defer file.Close()
-		testStatic := &StaticMock{}
-		bootstrap.StaticFS = testStatic
-		testStatic.On("Open", "/index.html").
-			Return(file, nil)
-		TestFunc := InjectSiteInfo()
-
-		c, _ := gin.CreateTestContext(rec)
-		c.Params = []gin.Param{}
-		c.Request, _ = http.NewRequest("GET", "/", nil)
-
-		cache.Set("setting_siteName", "cloudreve", 0)
-		cache.Set("setting_siteKeywords", "cloudreve", 0)
-		cache.Set("setting_siteScript", "cloudreve", 0)
-		cache.Set("setting_pwa_small_icon", "cloudreve", 0)
-
-		TestFunc(c)
-		asserts.True(c.IsAborted())
-	}
-
-	// 成功且未命中
-	{
-		file, _ := util.CreatNestedFile("tests/index.html")
-		defer file.Close()
-		testStatic := &StaticMock{}
-		bootstrap.StaticFS = testStatic
-		testStatic.On("Open", "/index.html").
-			Return(file, nil)
-		TestFunc := InjectSiteInfo()
-
-		c, _ := gin.CreateTestContext(rec)
-		c.Params = []gin.Param{}
-		c.Request, _ = http.NewRequest("GET", "/2", nil)
-
-		TestFunc(c)
-		asserts.False(c.IsAborted())
-	}
-
-}