added db and prefix options

lib/connect-redis.js

@@ -23,6 +23,10 @@ var RedisStore = module.exports = function RedisStore(options) {
     options = options || {};
     Store.call(this, options);
     this.client = new redis.createClient(options.port, options.host, options);
+    this.prefix = options.prefix;
+    if(options.db != null) {
+      this.client.select(options.db);
+    }
 };
 
 /**
@@ -40,6 +44,9 @@ RedisStore.prototype.__proto__ = Store.prototype;
  */
 
 RedisStore.prototype.get = function(hash, fn){
+    if(this.prefix)
+      hash = this.prefix + hash;
+
     this.client.get(hash, function(err, data){
         try {
             fn(null, data
@@ -61,6 +68,9 @@ RedisStore.prototype.get = function(hash, fn){
  */
 
 RedisStore.prototype.set = function(hash, sess, fn){
+    if(this.prefix)
+      hash = this.prefix + hash;
+
     var self = this;
     try {
         this.client.set(hash, JSON.stringify(sess), function(){
@@ -80,6 +90,9 @@ RedisStore.prototype.set = function(hash, sess, fn){
  */
 
 RedisStore.prototype.destroy = function(hash, fn){
+    if(this.prefix) 
+      hash = this.prefix + hash;
+
     this.client.del(hash, fn);
 };