diff --git a/libs/utils.js b/libs/utils.js
index 08eb5c1d..eb3a6eea 100644
--- a/libs/utils.js
+++ b/libs/utils.js
@@ -397,15 +397,48 @@ utils.prototype.arrayToRGBA = function (color) {
     return "rgba("+nowR+","+nowG+","+nowB+","+nowA+")";
 }
 
+utils.prototype._encodeRoute_id2number = function (id) {
+    var number = core.maps.getNumberById(id);
+    return number==0?id:number;
+}
+
+utils.prototype._encodeRoute_encodeOne = function (t) {
+    if (t.indexOf('item:')==0)
+        return "I"+this._encodeRoute_id2number(t.substring(5))+":";
+    else if (t.indexOf('unEquip:')==0)
+        return "u"+t.substring(8);
+    else if (t.indexOf('equip:')==0)
+        return "e"+this._encodeRoute_id2number(t.substring(6))+":";
+    else if (t.indexOf('fly:')==0)
+        return "F"+t.substring(4)+":";
+    else if (t.indexOf('choices:')==0)
+        return "C"+t.substring(8);
+    else if (t.indexOf('shop:')==0)
+        return "S"+t.substring(5);
+    else if (t=='turn')
+        return 'T';
+    else if (t.indexOf('turn:')==0)
+        return "t"+t.substring(5).substring(0,1).toUpperCase()+":";
+    else if (t=='getNext')
+        return 'G';
+    else if (t.indexOf('input:')==0)
+        return "P"+t.substring(6);
+    else if (t.indexOf('input2:')==0)
+        return "Q"+t.substring(7)+":";
+    else if (t=='no')
+        return 'N';
+    else if (t.indexOf('move:')==0)
+        return "M"+t.substring(5);
+    else if (t.indexOf('key:')==0)
+        return 'K'+t.substring(4);
+    else if (t.indexOf('random:')==0)
+        return 'X'+t.substring(7);
+    return '';
+}
+
 ////// 加密路线 //////
 utils.prototype.encodeRoute = function (route) {
-    var ans="";
-    var lastMove = "", cnt=0;
-
-    var id2number = function (id) {
-        var number = core.maps.getNumberById(id);
-        return number==0?id:number;
-    }
+    var ans="", lastMove = "", cnt=0;
 
     route.forEach(function (t) {
         if (t=='up' || t=='down' || t=='left' || t=='right') {
@@ -423,50 +456,70 @@ utils.prototype.encodeRoute = function (route) {
                 if (cnt>1) ans+=cnt;
                 cnt=0;
             }
-            if (t.indexOf('item:')==0)
-                ans+="I"+id2number(t.substring(5))+":";
-            else if (t.indexOf('unEquip:')==0)
-                ans+="u"+t.substring(8);
-            else if (t.indexOf('equip:')==0)
-                ans+="e"+id2number(t.substring(6))+":";
-            else if (t.indexOf('fly:')==0)
-                ans+="F"+t.substring(4)+":";
-            else if (t.indexOf('choices:')==0)
-                ans+="C"+t.substring(8);
-            else if (t.indexOf('shop:')==0)
-                ans+="S"+t.substring(5);
-            else if (t=='turn')
-                ans+='T';
-            else if (t.indexOf('turn:')==0)
-                ans+="t"+t.substring(5).substring(0,1).toUpperCase()+":";
-            else if (t=='getNext')
-                ans+='G';
-            else if (t.indexOf('input:')==0)
-                ans+="P"+t.substring(6);
-            else if (t.indexOf('input2:')==0)
-                ans+="Q"+t.substring(7)+":";
-            else if (t=='no')
-                ans+='N';
-            else if (t.indexOf('move:')==0)
-                ans+="M"+t.substring(5);
-            else if (t.indexOf('key:')==0)
-                ans+='K'+t.substring(4);
-            else if (t.indexOf('random:')==0)
-                ans+='X'+t.substring(7);
+            ans += core.utils._encodeRoute_encodeOne(t);
         }
     });
     if (cnt>0) {
         ans+=lastMove.substring(0,1).toUpperCase();
         if (cnt>1) ans+=cnt;
     }
-    // return ans;
-    // 压缩
     return LZString.compressToBase64(ans);
 }
 
+utils.prototype._decodeRoute_getNumber = function (decodeObj, noparse) {
+    var num="";
+    while (decodeObj.index<decodeObj.route.length && !isNaN(decodeObj.route.charAt(decodeObj.index))) {
+        num+=decodeObj.route.charAt(decodeObj.index++);
+    }
+    if (num.length==0) num="1";
+    return core.isset(noparse)?num:parseInt(num);
+}
+
+utils.prototype._decodeRoute_getString = function (decodeObj) {
+    var str="";
+    while (decodeObj.index<decodeObj.route.length && decodeObj.route.charAt(decodeObj.index)!=':') {
+        str+=decodeObj.route.charAt(decodeObj.index++);
+    }
+    decodeObj.index++;
+    return str;
+}
+
+utils.prototype._decodeRoute_number2id = function (number) {
+    if (/^\d+$/.test(number)) {
+        var info = core.maps.blocksInfo[number];
+        if (core.isset(info)) return info.id;
+    }
+    return number;
+}
+
+utils.prototype._decodeRoute_decodeOne = function (decodeObj, c) {
+    var nxt=(c=='I'|| c=='e' ||c=='F'||c=='S'||c=='Q'||c=='t')?
+        this._decodeRoute_getString(decodeObj):this._decodeRoute_getNumber(decodeObj);
+
+    var mp = {"U": "up", "D": "down", "L": "left", "R": "right"};
+
+    switch (c) {
+        case "U": case "D": case "L": case "R": for (var i=0;i<nxt;i++) decodeObj.ans.push(mp[c]); break;
+        case "I": decodeObj.ans.push("item:"+this._decodeRoute_number2id(nxt)); break;
+        case "u": decodeObj.ans.push("unEquip:"+nxt); break;
+        case "e": decodeObj.ans.push("equip:"+this._decodeRoute_number2id(nxt)); break;
+        case "F": decodeObj.ans.push("fly:"+nxt); break;
+        case "C": decodeObj.ans.push("choices:"+nxt); break;
+        case "S": decodeObj.ans.push("shop:"+nxt+":"+this._decodeRoute_getNumber(decodeObj, true)); break;
+        case "T": decodeObj.ans.push("turn"); break;
+        case "t": decodeObj.ans.push("turn:"+mp[nxt]); break;
+        case "G": decodeObj.ans.push("getNext"); break;
+        case "P": decodeObj.ans.push("input:"+nxt); break;
+        case "Q": decodeObj.ans.push("input2:"+nxt); break;
+        case "N": decodeObj.ans.push("no"); break;
+        case "M": ++decodeObj.index; ans.push("move:"+nxt+":"+this._decodeRoute_getNumber(decodeObj)); break;
+        case "K": decodeObj.ans.push("key:"+nxt); break;
+        case "X": decodeObj.ans.push("random:"+nxt); break;
+    }
+}
+
 ////// 解密路线 //////
 utils.prototype.decodeRoute = function (route) {
-
     if (!core.isset(route)) return route;
 
     // 解压缩
@@ -477,63 +530,11 @@ utils.prototype.decodeRoute = function (route) {
         }
     } catch (e) {}
 
-    var ans=[], index=0;
-
-    var getNumber = function (noparse) {
-        var num="";
-        while (index<route.length && !isNaN(route.charAt(index))) {
-            num+=route.charAt(index++);
-        }
-        if (num.length==0) num="1";
-        return core.isset(noparse)?num:parseInt(num);
+    var decodeObj = {route: route, index: 0, ans: []};
+    while (decodeObj.index < decodeObj.route.length) {
+        this._decodeRoute_decodeOne(decodeObj, decodeObj.route.charAt(decodeObj.index++));
     }
-    var getString = function () {
-        var str="";
-        while (index<route.length && route.charAt(index)!=':') {
-            str+=route.charAt(index++);
-        }
-        index++;
-        return str;
-    }
-    var mp = {
-        "U": "up",
-        "D": "down",
-        "L": "left",
-        "R": "right"
-    }
-
-    var number2id = function (nxt) {
-        if (/^\d+$/.test(nxt)) {
-            var info = core.maps.blocksInfo[nxt];
-            if (core.isset(info)) return info.id;
-        }
-        return nxt;
-    }
-
-    while (index<route.length) {
-        var c=route.charAt(index++);
-        var nxt=(c=='I'|| c=='e' ||c=='F'||c=='S'||c=='Q'||c=='t')?getString():getNumber();
-
-        switch (c) {
-            case "U": case "D": case "L": case "R": for (var i=0;i<nxt;i++) ans.push(mp[c]); break;
-            case "I":ans.push("item:"+number2id(nxt)); break;
-            case "u": ans.push("unEquip:"+nxt); break;
-            case "e": ans.push("equip:"+number2id(nxt)); break;
-            case "F": ans.push("fly:"+nxt); break;
-            case "C": ans.push("choices:"+nxt); break;
-            case "S": ans.push("shop:"+nxt+":"+getNumber(true)); break;
-            case "T": ans.push("turn"); break;
-            case "t": ans.push("turn:"+mp[nxt]); break;
-            case "G": ans.push("getNext"); break;
-            case "P": ans.push("input:"+nxt); break;
-            case "Q": ans.push("input2:"+nxt); break;
-            case "N": ans.push("no"); break;
-            case "M": ++index; ans.push("move:"+nxt+":"+getNumber()); break;
-            case "K": ans.push("key:"+nxt); break;
-            case "X": ans.push("random:"+nxt); break;
-        }
-    }
-    return ans;
+    return decodeObj.ans;
 }
 
 ////// 判断某对象是否不为undefined也不会null //////