cache dir snap improve for old versions

themes/beauty/controller/SiteController.php

@@ -172,6 +172,7 @@ Class SiteController extends Controller {
         $msg = 'OK';
         $url = '';
         $img_id = '';
+        $size = 'orignal';
 
         $cacheId = $this->post('cid', '');
         $cateId = $this->post('id', '');
@@ -192,6 +193,11 @@ Class SiteController extends Controller {
                 }
             }
 
+            //弃用老版本数据格式，抛弃没有size属性的
+            if (!empty($cachedData) && empty($cachedData['size'])) {
+                $cachedData = null;
+            }
+
             if (empty($cachedData)) {
                 //从缓存数据中获取目录的realpath
                 $cachedData = Common::getCacheFromFile($cacheId);
@@ -219,7 +225,8 @@ Class SiteController extends Controller {
                             if (!empty($cachedData)) {
                                 $url = $cachedData['snapshot'];
                                 $cacheSubDir = 'dir';
-                                Common::saveCacheToFile($cacheKey, compact('url', 'img_id'), $cacheSubDir);
+                                $size = 'vm';
+                                Common::saveCacheToFile($cacheKey, compact('url', 'img_id', 'size'), $cacheSubDir);
                             }
                         }
                     }else {