From f08d79ea82012c8e118770e524e483288a70e198 Mon Sep 17 00:00:00 2001
From: coderaiser <mnemonic.enemy@gmail.com>
Date: Mon, 31 Mar 2014 03:55:51 -0400
Subject: [PATCH] feature(zip) add unescape pollyfill

---
 lib/client/zip.js | 50 +++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 48 insertions(+), 2 deletions(-)

diff --git a/lib/client/zip.js b/lib/client/zip.js
index 0d757e69..c551f476 100644
--- a/lib/client/zip.js
+++ b/lib/client/zip.js
@@ -3,7 +3,11 @@ var Util, Zip, pako;
 (function () {
     'use strict';
    
-   Zip = new ZipProto();
+   var UTF8 = {
+       unescape: typeof unescape === 'function' ? unescape : decode
+   };
+   
+   Zip      = new ZipProto();
    
    function ZipProto() {
         this.pack = function(str, callback) {
@@ -29,7 +33,7 @@ var Util, Zip, pako;
         
         function utf8AbFromStr(str) {
             var i,
-                strUtf8 = unescape(encodeURIComponent(str)),
+                strUtf8 = UTF8.unescape(encodeURIComponent(str)),
                 n       = strUtf8.length,
                 arr     = new Uint8Array(n);
             
@@ -39,4 +43,46 @@ var Util, Zip, pako;
             return arr;
         }
    }
+   
+    /* unescape polyfill
+     * http://unixpapa.com/js/querystring.html
+     */
+    function decode(s) {
+        s = s.replace(/%([EF][0-9A-F])%([89AB][0-9A-F])%([89AB][0-9A-F])/gi,
+            function(code,hex1,hex2,hex3) {
+                var n, n3,
+                    n1 = parseInt(hex1,16)-0xE0;
+                    n2 = parseInt(hex2,16)-0x80;
+                
+                if (n1 === 0 && n2 < 32)
+                    return code;
+                
+                n3  = parseInt(hex3,16)-0x80;
+                n   = (n1<<12) + (n2<<6) + n3;
+                
+                if (n > 0xFFFF)
+                    return code;
+                
+                return String.fromCharCode(n);
+            });
+        s = s.replace(/%([CD][0-9A-F])%([89AB][0-9A-F])/gi,
+            function(code,hex1,hex2) {
+                var n1, n2;
+                
+                n1 = parseInt(hex1,16) - 0xC0;
+                
+                if (n1 < 2)
+                    return code;
+                
+                n2 = parseInt(hex2,16) - 0x80;
+                
+                return String.fromCharCode((n1<<6) + n2);
+            });
+        s = s.replace(/%([0-7][0-9A-F])/gi,
+            function(code, hex) {
+                return String.fromCharCode(parseInt(hex,16));
+            });
+        
+        return s;
+    }
 })();