diff --git a/lib/requestHandler.js b/lib/requestHandler.js
index 36053a7..a84ba13 100644
--- a/lib/requestHandler.js
+++ b/lib/requestHandler.js
@@ -5,6 +5,7 @@ var http  = require("http"),
     url            = require("url"),
     pathUtil       = require("path"),
     color          = require("colorful"),
+    sleep          = require("sleep"),
     httpsServerMgr = require("./httpsServerMgr");
 
 var httpsServerMgrInstance = new httpsServerMgr();
@@ -77,6 +78,13 @@ function userRequestHandler(req,userRes){
                 console.log("file not exist : " + targetLocalfile);
             }
         }
+
+        //sleep for seconds if configed in the rule file
+        //see rule_sample.js
+        if(hostTest && pathTest && !!rule.sleep){
+            console.log(color.yellow('[' + req.url + '] will sleep for ' + rule.sleep + ' seconds.'));
+            sleep.sleep(rule.sleep);
+        }
     }
 
     if(ifLocalruleMatched){
diff --git a/package.json b/package.json
index fe730c8..7ea7441 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,8 @@
     "async": "~0.9.0",
     "async-task-mgr": "^1.0.1",
     "colorful": "^2.1.0",
-    "commander": "~2.3.0"
+    "commander": "~2.3.0",
+    "sleep": "~1.1.8"
   },
   "devDependencies": {
     "tunnel": "0.0.3"
diff --git a/rule_sample.js b/rule_sample.js
index 53eede7..5273e3e 100644
--- a/rule_sample.js
+++ b/rule_sample.js
@@ -17,6 +17,10 @@ var rules = {
             "path"      :/tps/,
             "localFile" :"",
             "localDir"  :"/Users/Stella/tmp/"
+        },{
+            "host"      :/./,
+            "path"      :/\.(js)/,
+            "sleep"     :5//seconds
         }
     ]
     ,"httpsConfig":{