From 3dce787c476e78f3abd77a4228f32a14e6f4c676 Mon Sep 17 00:00:00 2001
From: Henry <hi@henry.wang>
Date: Thu, 24 Jan 2019 22:50:32 +0000
Subject: [PATCH] Add refresh for redis cache

---
 lib/middleware/redis-cache.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/middleware/redis-cache.js b/lib/middleware/redis-cache.js
index bc06d217f..de0129dd6 100644
--- a/lib/middleware/redis-cache.js
+++ b/lib/middleware/redis-cache.js
@@ -43,7 +43,13 @@ module.exports = function(options = {}) {
     options.app.context.cache = {
         get: async (key) => {
             if (key) {
-                return await redisClient.get(key);
+                const value = await redisClient.get(key);
+                if (value) {
+                    let ttl = redisClient.ttl(key);
+                    ttl = ttl > expire ? ttl : expire * 2;
+                    await redisClient.setex(key, ttl, value);
+                }
+                return value;
             }
         },
         set: async (key, value, maxAge) => {