add

@@ -132,13 +132,16 @@ function cutdown()
   
    local method = http_request.get_method() 
    local app_version = http_request.get_req_param("app_version")
-   if method and  method == "app.cutdownprice.cut" and app_version < "2.9.5"  then
-    ngx.log(ngx.ERR, "[NOT ALLOWED]")
-
-    local rsp ='{"code": 10000, "message": "请升级小程序"}'
-    ngx.say(rsp)
-    ngx.exit(ngx.HTTP_OK)
-    return
+   
+   if method and  method == "app.cutdownprice.cut"  then
+     if (not app_version) or (  app_version < "2.9.5") then
+        ngx.log(ngx.ERR, "[NOT ALLOWED]")
+
+        local rsp ='{"code": 10000, "message": "请升级小程序"}'
+        ngx.say(rsp)
+        ngx.exit(ngx.HTTP_OK)
+        return
+     end
    end
 end