update

ctx.go

@@ -1453,7 +1453,7 @@ func (c *DefaultCtx) SendFile(file string, config ...SendFile) error {
 	}
 
 	// https://github.com/valyala/fasthttp/blob/c7576cc10cabfc9c993317a2d3f8355497bea156/fs.go#L129-L134
-	route.sendFileOnce.Do(func() {
+	if route.sendFileFS == nil {
 		route.sendFileFS = &fasthttp.FS{
 			Root:                 "",
 			FS:                   cfg.FS,
@@ -1480,7 +1480,7 @@ func (c *DefaultCtx) SendFile(file string, config ...SendFile) error {
 		if maxAge > 0 {
 			route.sendFileCacheControlValue = "public, max-age=" + strconv.Itoa(maxAge)
 		}
-	})
+	}
 
 	// Keep original path for mutable params
 	c.pathOriginal = utils.CopyString(c.pathOriginal)

ctx_test.go

@@ -3041,7 +3041,6 @@ func Test_Ctx_SendFile_Compressed(t *testing.T) {
 
 	defer func() {
 		require.NoError(t, f.Close())
-
 	}()
 	expectFileContent, err := io.ReadAll(f)
 	require.NoError(t, err)

router.go

@@ -10,7 +10,6 @@ import (
 	"html"
 	"sort"
 	"strings"
-	"sync"
 	"sync/atomic"
 
 	"github.com/gofiber/utils/v2"
@@ -62,7 +61,6 @@ type Route struct {
 	Params   []string  `json:"params"` // Case sensitive param keys
 	Handlers []Handler `json:"-"`      // Ctx handlers
 
-	sendFileOnce              sync.Once
 	sendFileFS                *fasthttp.FS
 	sendFileHandler           fasthttp.RequestHandler
 	sendFileCacheControlValue string