add a sample for reverse proxy

bin.js

@@ -4,6 +4,7 @@ var program     = require('commander'),
     proxy       = require("./proxy.js"),
     color       = require('colorful'),
     fs          = require("fs"),
+    path        = require("path"),
     packageInfo = require("./package.json");
 
 program
@@ -33,15 +34,16 @@ if(program.clear){
     var ruleModule;
 
     if(program.rule){
-        if(fs.existsSync(program.rule)){
-            try{ //for abs path
+        var ruleFilePath = path.join(process.cwd(),program.rule);
+        try{
+            if(fs.existsSync(ruleFilePath)){
                 ruleModule = require(program.rule);
-            }catch(e){ //for relative path
-                ruleModule = require(process.cwd() + '/' + program.rule.replace(/^\.\//,''));
+                console.log("rule file loaded :" + ruleFilePath);
+            }else{
+                console.log(color.red("can not find rule file"));
             }
-            console.log(color.green("rule file loaded"));
-        }else{
-            console.log(color.red("can not find rule file"));
+        }catch(e){
+            console.log("failed to load rule file :" + e.toString());
         }
     }
 

lib/requestHandler.js

@@ -364,7 +364,7 @@ function setRules(newRule){
         }
         if('function' == typeof(userRule.summary)){
             functions.push(function(cb){
-                userRule.summary();
+                console.log(userRule.summary());
                 cb(null);
             });
         }

rule_sample/README.md

@@ -27,6 +27,9 @@ The following are sample rules.
 * rule_replace_response_status_code.js
     * replace server's status code
     * 改变服务端响应的http状态码
+* rule_reverse_proxy.js
+    * assign a specific ip address for request
+    * 为请求绑定目标ip
 * rule_use_local_data.js
     * map some requests to local file
     * 把图片响应映射到本地