diff --git a/src/vs/base/common/network.ts b/src/vs/base/common/network.ts
index aef207be36760ad64e6753404542931847da96d9..23bd55f774835aeb8af989d96c20c989efb5fae3 100644
--- a/src/vs/base/common/network.ts
+++ b/src/vs/base/common/network.ts
@@ -4,6 +4,8 @@
  *--------------------------------------------------------------------------------------------*/
 'use strict';
 
+import {TPromise} from 'vs/base/common/winjs.base';
+
 export namespace Schemas {
 
 	/**
@@ -18,3 +20,65 @@ export namespace Schemas {
 
 	export var file:string = 'file';
 }
+
+export interface IXHROptions {
+	type?:string;
+	url?:string;
+	user?:string;
+	password?:string;
+	responseType?:string;
+	headers?:any;
+	customRequestInitializer?:(req:any)=>void;
+	data?:any;
+}
+
+export function xhr(options:IXHROptions): TPromise<XMLHttpRequest> {
+	let req:XMLHttpRequest = null;
+	let canceled = false;
+
+	return new TPromise<XMLHttpRequest>((c, e, p) => {
+		req = new XMLHttpRequest();
+
+		req.onreadystatechange = () => {
+			if (canceled) {
+				return;
+			}
+
+			if (req.readyState === 4) {
+				// Handle 1223: http://bugs.jquery.com/ticket/1450
+				if ((req.status >= 200 && req.status < 300) || req.status === 1223) {
+					c(req);
+				} else {
+					e(req);
+				}
+				req.onreadystatechange = () => { };
+			} else {
+				p(req);
+			}
+		};
+
+		req.open(
+			options.type || 'GET',
+			options.url,
+			// Promise based XHR does not support sync.
+			//
+			true,
+			options.user,
+			options.password
+		);
+		req.responseType = options.responseType || '';
+
+		Object.keys(options.headers || {}).forEach((k) => {
+			req.setRequestHeader(k, options.headers[k]);
+		});
+
+		if (options.customRequestInitializer) {
+			options.customRequestInitializer(req);
+		}
+
+		req.send(options.data);
+	}, () => {
+		canceled = true;
+		req.abort();
+	});
+}
diff --git a/src/vs/base/common/winjs.base.d.ts b/src/vs/base/common/winjs.base.d.ts
index 2b29355a65b45ce01d19eb4b291355cb098ce640..b984548337863546ed606aeb259e4803ef39d262 100644
--- a/src/vs/base/common/winjs.base.d.ts
+++ b/src/vs/base/common/winjs.base.d.ts
@@ -43,18 +43,6 @@ export declare class Promise {
 	public cancel():void;
 }
 
-export interface IXHROptions {
-	type?:string;
-	url?:string;
-	user?:string;
-	password?:string;
-	responseType?:string;
-	headers?:any;
-	customRequestInitializer?:(req:any)=>void;
-	data?:any;
-}
-
-export declare function xhr(options:IXHROptions):TPromise<XMLHttpRequest>;
 export declare function decoratePromise(promise:Promise, successCallback?:ValueCallback, errorCallback?:ErrorCallback):Promise;
 export declare function decoratePromise<T>(promise:TPromise<T>, successCallback?:TValueCallback<T>, errorCallback?:ErrorCallback):TPromise<T>;
 
diff --git a/src/vs/platform/request/common/baseRequestService.ts b/src/vs/platform/request/common/baseRequestService.ts
index f821d9954b8d01d0d42efc752f14c836ff9cc305..13843808f9d33a5dbdd993102d7487b38e8c5d35 100644
--- a/src/vs/platform/request/common/baseRequestService.ts
+++ b/src/vs/platform/request/common/baseRequestService.ts
@@ -5,7 +5,8 @@
 'use strict';
 
 import URI from 'vs/base/common/uri';
-import {TPromise, xhr, IXHROptions} from 'vs/base/common/winjs.base';
+import {TPromise} from 'vs/base/common/winjs.base';
+import {xhr, IXHROptions} from 'vs/base/common/network';
 import strings = require('vs/base/common/strings');
 import Timer = require('vs/base/common/timer');
 import Async = require('vs/base/common/async');
diff --git a/src/vs/platform/request/node/nodeRequestService.ts b/src/vs/platform/request/node/nodeRequestService.ts
index dfceb3a6a6381b371088cffb05a85adcb23f1b20..d39226205b3cb864264cff35967cd98258a4d918 100644
--- a/src/vs/platform/request/node/nodeRequestService.ts
+++ b/src/vs/platform/request/node/nodeRequestService.ts
@@ -5,7 +5,8 @@
 
 'use strict';
 
-import { TPromise, xhr } from 'vs/base/common/winjs.base';
+import { TPromise } from 'vs/base/common/winjs.base';
+import { xhr } from 'vs/base/common/network';
 import { IDisposable, dispose } from 'vs/base/common/lifecycle';
 import { IConfigurationService } from 'vs/platform/configuration/common/configuration';
 import { IRequestService } from 'vs/platform/request/common/request';
diff --git a/src/vs/workbench/services/request/node/requestService.ts b/src/vs/workbench/services/request/node/requestService.ts
index 2c8e977726e72b5d4d19f23fec8de2e8b4621b88..b8e49c5c9c125535d7e8db554e7dd84483cfff6a 100644
--- a/src/vs/workbench/services/request/node/requestService.ts
+++ b/src/vs/workbench/services/request/node/requestService.ts
@@ -5,7 +5,8 @@
 
 'use strict';
 
-import { TPromise, Promise, xhr } from 'vs/base/common/winjs.base';
+import { TPromise, Promise } from 'vs/base/common/winjs.base';
+import { xhr } from 'vs/base/common/network';
 import { IConfigurationRegistry, Extensions } from 'vs/platform/configuration/common/configurationRegistry';
 import strings = require('vs/base/common/strings');
 import nls = require('vs/nls');