From 3104ee167c96e73fdddd1bdea75282832dcb934a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8A=A0=E9=87=8C?= <xiaofeng.mxf@taobao.com>
Date: Tue, 21 Oct 2014 13:44:22 +0800
Subject: [PATCH] update local rule

---
 rule_sample/rule_use_local_data.js | 50 +++++++-----------------------
 1 file changed, 11 insertions(+), 39 deletions(-)

diff --git a/rule_sample/rule_use_local_data.js b/rule_sample/rule_use_local_data.js
index a9221c8..507b78e 100644
--- a/rule_sample/rule_use_local_data.js
+++ b/rule_sample/rule_use_local_data.js
@@ -1,53 +1,25 @@
 //replace all the images with local one
-
-var url = require("url"),
+var url     = require("url"),
     path    = require("path"),
-    fs      = require("fs"),
-    buffer  = require("buffer");
+    fs      = require("fs");
 
-var map = [
-        {
-            "host"      :/./,
-            "path"      :/\.(png|gif|jpg|jpeg)/,
-            "localFile" :"/Users/Stella/tmp/test.png",
-            "localDir"  :"~/"
-        }
-    ];
+var LOCAL_IMAGE = "/Users/path/to/image.png";
 
 module.exports = {
+
+    //mark if use local response
     shouldUseLocalResponse : function(req,reqBody){
-        var host       = req.headers.host,
-            urlPattern = url.parse(req.url),
-            path       = urlPattern.path;
-
-        for(var index in map){
-            var rule = map[index];
-
-            var hostTest = new RegExp(rule.host).test(host),
-                pathTest = new RegExp(rule.path).test(path);
-
-            if(hostTest && pathTest && (rule.localFile || rule.localDir) ){
-                var targetLocalfile = rule.localFile;
-
-                //localfile not set, map to dir
-                if(!targetLocalfile){ //find file in dir, /a/b/file.html -> dir + b/file.html
-                    var remotePathWithoutPrefix = path.replace(new RegExp(rule.path),""); //remove prefix
-                    targetLocalfile = pathUtil.join(rule.localDir,remotePathWithoutPrefix);
-                }
-
-                if(fs.existsSync(targetLocalfile)){
-                    console.log("==>local file: " + targetLocalfile);
-                    req.replaceLocalFile = targetLocalfile; //add a flag to req object
-                    return true;
-                }
-            }
+        if(/\.(png|gif|jpg|jpeg)$/.test(req.url)){
+            req.replaceLocalFile = true;
+            return true;
+        }else{
+            return false;
         }
-        return false;
     },
 
     dealLocalResponse : function(req,reqBody,callback){
         if(req.replaceLocalFile){
-            callback(200, {"content-type":"image/png"}, fs.readFileSync(req.replaceLocalFile) );
+            callback(200, {"content-type":"image/png"}, fs.readFileSync(LOCAL_IMAGE) );
         }
     }
 };