feat(middleware): add extra fields

- Add fields `WantJson`

Author: marjune163

src/middleware/context.go

@@ -19,6 +19,8 @@ type Context struct {
 	RestrictAccess bool
 	AllowAccess    bool
 
+	WantJson bool
+
 	Status int
 
 	Item     os.FileInfo

src/serverHandler/middleware.go

@@ -24,6 +24,8 @@ func (h *aliasHandler) postMiddleware(w http.ResponseWriter, r *http.Request, da
 		RestrictAccess: data.RestrictAccess,
 		AllowAccess:    data.AllowAccess,
 
+		WantJson: data.WantJson,
+
 		Status: data.Status,
 
 		Item:     data.Item,