From 2257875db752c133c4b38424599e115cf959c4ff Mon Sep 17 00:00:00 2001
From: DIYgod <diy.d.god@gmail.com>
Date: Mon, 19 Nov 2018 11:43:08 +0800
Subject: [PATCH] forbid "undefined" cache value

---
 middleware/lru-cache.js   | 2 +-
 middleware/redis-cache.js | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/middleware/lru-cache.js b/middleware/lru-cache.js
index 073408f068..5c8790ffb6 100644
--- a/middleware/lru-cache.js
+++ b/middleware/lru-cache.js
@@ -26,7 +26,7 @@ module.exports = function(options = {}) {
             }
         },
         set: (key, value, maxAge) => {
-            if (!value) {
+            if (!value || value === 'undefined') {
                 value = '';
             }
             if (typeof value === 'object') {
diff --git a/middleware/redis-cache.js b/middleware/redis-cache.js
index 309ae776c2..0cc8d4f72d 100644
--- a/middleware/redis-cache.js
+++ b/middleware/redis-cache.js
@@ -47,7 +47,7 @@ module.exports = function(options = {}) {
             }
         },
         set: async (key, value, maxAge) => {
-            if (!value) {
+            if (!value || value === 'undefined') {
                 value = '';
             }
             if (typeof value === 'object') {