| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// This contains a reader that accesses data using the HttpRequest |
| /// facility, and thus works only in the web browser. |
| |
| library http_request_data_reader; |
| |
| import 'dart:async'; |
| import 'dart:html'; |
| import 'intl_helpers.dart'; |
| |
| class HttpRequestDataReader implements LocaleDataReader { |
| /// The base url from which we read the data. |
| String url; |
| HttpRequestDataReader(this.url); |
| |
| Future read(String locale) { |
| var request = new HttpRequest(); |
| request.timeout = 5000; |
| return _getString('$url$locale.json', request).then((r) => r.responseText); |
| } |
| |
| /// Read a string with the given request. This is a stripped down copy |
| /// of HttpRequest getString, but was the simplest way I could find to |
| /// issue a request with a timeout. |
| Future<HttpRequest> _getString(String url, HttpRequest xhr) { |
| var completer = new Completer<HttpRequest>(); |
| xhr.open('GET', url, async: true); |
| xhr.onLoad.listen((e) { |
| // Note: file:// URIs have status of 0. |
| if ((xhr.status >= 200 && xhr.status < 300) || |
| xhr.status == 0 || |
| xhr.status == 304) { |
| completer.complete(xhr); |
| } else { |
| completer.completeError(e); |
| } |
| }); |
| |
| xhr.onError.listen(completer.completeError); |
| xhr.send(); |
| |
| return completer.future; |
| } |
| } |