超时时间

@@ -6,11 +6,23 @@ module.exports = (type, query, req) => {
     query = type === 'url' ? md5(query) : query;
 
     if (redis && _.get(req.app.locals.pc, 'ci.tdk', false)) {
-        return redis.multi([
+        let arr = [];
+
+        arr.push(redis.multi([
             ['exists', `tdk:${type}:${query}`],
             ['hmget', `tdk:${type}:${query}`, 'key', 'title', 'keywords', 'description']
-        ]).execAsync().then(function(res) {
-            return res[1];
+        ]).execAsync());
+
+        arr.push(new Promise((resolve)=>{
+            setTimeout(resolve, 500, []);
+        }));
+
+        return Promise.race(arr).then(function(res) {
+            if (res.length) {
+                return res[1];
+            } else {
+                return [];
+            }
         });
     } else {
         return Promise.resolve([]);