From 567e73df77825dfa5f79a0fa45c1ecae9f1460e4 Mon Sep 17 00:00:00 2001
From: DIYgod <diy.d.god@gmail.com>
Date: Thu, 28 Mar 2019 00:29:05 +0800
Subject: [PATCH] avoid repeating setting cache

---
 lib/middleware/cache.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/middleware/cache.js b/lib/middleware/cache.js
index 5feddf2f40..2a50251e3c 100644
--- a/lib/middleware/cache.js
+++ b/lib/middleware/cache.js
@@ -43,7 +43,11 @@ module.exports = function(app, options = {}) {
                     return value;
                 }
             },
-            set: async (key, value, maxAge = 24 * 60 * 60) => {
+            set: async function(key, value, maxAge = 24 * 60 * 60) {
+                if (await redisClient.exists(key)) {
+                    logger.warn(`repeated key: ${key}, ${value}`);
+                    return;
+                }
                 if (!value || value === 'undefined') {
                     value = '';
                 }