From efaf559ae846567e68e4d96446c8760c3ceed8fc Mon Sep 17 00:00:00 2001
From: Vladimir Kotikov <v-vlkoti@microsoft.com>
Date: Tue, 27 May 2014 15:45:43 +0400
Subject: [PATCH] [CB-6763] Fixes issue when multiple simultaneous requests are
 sent.

---
 wp8/template/cordovalib/XHRHelper.cs | 62 +++++++++++++++-------------
 1 file changed, 34 insertions(+), 28 deletions(-)

diff --git a/wp8/template/cordovalib/XHRHelper.cs b/wp8/template/cordovalib/XHRHelper.cs
index d1651c30..534d5503 100644
--- a/wp8/template/cordovalib/XHRHelper.cs
+++ b/wp8/template/cordovalib/XHRHelper.cs
@@ -18,9 +18,28 @@ public class XHRHelper : IBrowserDecorator
 
         public void InjectScript()
         {
+            string script = @"(function(win, doc) {
 
+    var __XHRShimAliases = {};
 
-            string script = @"(function(win, doc) {
+    window.__onXHRLocalCallback = function (responseCode, responseText, reqId) {
+        if (__XHRShimAliases[reqId]){
+            var alias = __XHRShimAliases[reqId];
+            if (alias){
+                delete __XHRShimAliases[reqId];
+                if (responseCode == '200'){
+                    alias.onResult && alias.onResult(responseText);
+                    Object.defineProperty(alias, 'responseXML', {
+                        get: function () {
+                            return new DOMParser().parseFromString(this.responseText, 'text/xml');
+                        }
+                    });
+                } else {
+                    alias.onError && alias.onError(responseText);
+                }
+            }
+        }
+    };
 
     var docDomain = null;
     try {
@@ -221,32 +240,17 @@ public void InjectScript()
                         resolvedUrl = basePath + resolvedUrl; // consider it relative
                     }
 
+                    // Generate unique request ID
+                    var reqId = new Date().getTime().toString() + Math.random();
+
                     var funk = function () {
-                        window.__onXHRLocalCallback = function (responseCode, responseText) {
-                            alias.status = responseCode;
-                            if (responseCode == '200') {
-                                alias.responseText = responseText;
-                                Object.defineProperty(alias, 'responseXML', {
-                                    get: function () {
-                                        return new DOMParser().parseFromString(this.responseText, 'text/xml');
-                                    }
-                                });
-                            }
-                            else {
-                                alias.onerror && alias.onerror(responseCode);
-                            }
+                        __XHRShimAliases[reqId] = alias;
 
-                            alias.changeReadyState(XHRShim.DONE);
-                        }
                         alias.changeReadyState(XHRShim.LOADING);
-                        window.external.Notify('XHRLOCAL/' + resolvedUrl);
-                    }
-                    if (this.isAsync) {
-                        setTimeout(funk, 0);
-                    }
-                    else {
-                        funk();
-                    }
+                        window.external.Notify('XHRLOCAL/' + reqId + '/' + resolvedUrl);
+                    };
+
+                    this.isAsync ? setTimeout(funk, 0) : funk();
                 }
             },
             status: 404
@@ -262,7 +266,9 @@ public bool HandleCommand(string commandStr)
         {
             if (commandStr.IndexOf("XHRLOCAL") == 0)
             {
-                string url = commandStr.Replace("XHRLOCAL/", "");
+                var reqStr = commandStr.Replace("XHRLOCAL/", "").Split(new char[] {'/'}, 2);
+                string reqId = reqStr[0];
+                string url = reqStr[1];
 
                 Uri uri = new Uri(url, UriKind.RelativeOrAbsolute);
 
@@ -273,7 +279,7 @@ public bool HandleCommand(string commandStr)
                         using (TextReader reader = new StreamReader(isoFile.OpenFile(uri.AbsolutePath, FileMode.Open, FileAccess.Read)))
                         {
                             string text = reader.ReadToEnd();
-                            Browser.InvokeScript("__onXHRLocalCallback", new string[] { "200", text });
+                            Browser.InvokeScript("__onXHRLocalCallback", new string[] { "200", text, reqId });
                             return true;
                         }
                     }
@@ -286,7 +292,7 @@ public bool HandleCommand(string commandStr)
                 if (resource == null)
                 {
                     // 404 ?
-                    Browser.InvokeScript("__onXHRLocalCallback", new string[] { "404" });
+                    Browser.InvokeScript("__onXHRLocalCallback", new string[] { "404", null, reqId });
                     return true;
                 }
                 else
@@ -294,7 +300,7 @@ public bool HandleCommand(string commandStr)
                     using (StreamReader streamReader = new StreamReader(resource.Stream))
                     {
                         string text = streamReader.ReadToEnd();
-                        Browser.InvokeScript("__onXHRLocalCallback", new string[] { "200", text });
+                        Browser.InvokeScript("__onXHRLocalCallback", new string[] { "200", text, reqId });
                         return true;
                     }
                 }