Load stocks data off the network

sky/framework/net/fetch.dart

Index: sky/framework/net/fetch.dart
diff --git a/sky/framework/net/fetch.dart b/sky/framework/net/fetch.dart
new file mode 100644
index 0000000000000000000000000000000000000000..a2ac890baf48998ff7653508aa6501c16d21b74f
--- /dev/null
+++ b/sky/framework/net/fetch.dart
@@ -0,0 +1,45 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import '../shell.dart' as shell;
+import 'dart:async';
+import 'dart:mojo.core' as core;
+import 'dart:sky' as sky;
+import 'dart:typed_data';
+import 'package:mojo/services/network/public/interfaces/network_service.mojom.dart';
+import 'package:mojo/services/network/public/interfaces/url_loader.mojom.dart';
+
+class Response {
+  ByteData body;
+
+  Response(this.body);
+
+  String bodyAsString() {
+    return new String.fromCharCodes(new Uint8List.view(body.buffer));
+  }
+}
+
+Future<Response> fetch(String relativeUrl) async {
+  String url = new sky.URL(relativeUrl, sky.document.baseURI).href;
+
+  var net = new NetworkServiceProxy.unbound();
+  shell.requestService(net);
+
+  var loader = new UrlLoaderProxy.unbound();
+  net.ptr.createUrlLoader(loader);
+
+  var request = new UrlRequest()
+      ..url = url
+      ..autoFollowRedirects = true;
+  var response = (await loader.ptr.start(request)).response;
+
+  loader.close();
+  net.close();
+
+  if (response.body == null)
+    return new Response(null);
+
+  ByteData data = await core.DataPipeDrainer.drainHandle(response.body);
+  return new Response(data);
+}