Merge pull request #2 from Ziao/master

Added support for ioredis

Author: wyattjoh

README.md

@@ -35,7 +35,7 @@ app.use(limiter);
 
 * **expiry**: seconds - how long each rate limiting window exists for. Defaults to `60`.
 * **prefix**: string - prefix to add to entries in Redis. Defaults to `rl:`.
-* **client**: [Redis Client](https://github.com/NodeRedis/node_redis) - A node_redis Redis Client to use. Defaults to `require('redis').createClient();`.
+* **client**: [Redis Client](https://github.com/NodeRedis/node_redis) or [ioredis Client](https://github.com/luin/ioredis)- A Redis Client to use. Defaults to `require('redis').createClient();`.
 
 ## License
 

lib/redis-store.js

@@ -22,6 +22,17 @@ var RedisStore = function(options) {
           return cb(err);
         }
 
+        // in ioredis, every reply consists of an array [err, value].
+        // We don't need the error here, and if we aren't dealing with an array,
+        // nothing is changed.
+        replies = replies.map(function(val) {
+          if (Array.isArray(val) && val.length >= 2) {
+            return val[1];
+          }
+
+          return val;
+        });
+
         // if this is new or has no expiry
         if (replies[0] === 1 || replies[1] === -1) {
           // then expire it after the timeout