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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 library http.browser_client; | |
| 6 | |
| 7 import 'dart:async'; | |
| 8 import 'dart:html'; | |
| 9 | |
| 10 import 'package:stack_trace/stack_trace.dart'; | |
| 11 | |
| 12 import 'src/base_client.dart'; | |
| 13 import 'src/base_request.dart'; | |
| 14 import 'src/byte_stream.dart'; | |
| 15 import 'src/exception.dart'; | |
| 16 import 'src/streamed_response.dart'; | |
| 17 | |
| 18 // TODO(nweiz): Move this under src/, re-export from lib/http.dart, and use this | |
| 19 // automatically from [new Client] once we can create an HttpRequest using | |
| 20 // mirrors on dart2js (issue 18541) and dart2js doesn't crash on pkg/collection | |
| 21 // (issue 18535). | |
| 22 | |
| 23 /// A `dart:html`-based HTTP client that runs in the browser and is backed by | |
| 24 /// XMLHttpRequests. | |
| 25 /// | |
| 26 /// This client inherits some of the limitations of XMLHttpRequest. It ignores | |
| 27 /// the [BaseRequest.contentLength], [BaseRequest.persistentConnection], | |
| 28 /// [BaseRequest.followRedirects], and [BaseRequest.maxRedirects] fields. It is | |
| 29 /// also unable to stream requests or responses; a request will only be sent and | |
| 30 /// a response will only be returned once all the data is available. | |
| 31 class BrowserClient extends BaseClient { | |
| 32 /// The currently active XHRs. | |
| 33 /// | |
| 34 /// These are aborted if the client is closed. | |
| 35 final _xhrs = new Set<HttpRequest>(); | |
| 36 | |
| 37 /// Creates a new HTTP client. | |
| 38 BrowserClient(); | |
| 39 | |
| 40 /// Sends an HTTP request and asynchronously returns the response. | |
| 41 Future<StreamedResponse> send(BaseRequest request) { | |
| 42 return request.finalize().toBytes().then((bytes) { | |
| 43 var xhr = new HttpRequest(); | |
| 44 _xhrs.add(xhr); | |
| 45 xhr.open(request.method, request.url.toString(), async: true); | |
| 46 xhr.responseType = 'blob'; | |
| 47 request.headers.forEach(xhr.setRequestHeader); | |
| 48 | |
| 49 var completer = new Completer(); | |
| 50 xhr.onLoad.first.then((_) { | |
| 51 // TODO(nweiz): Set the response type to "arraybuffer" when issue 18542 | |
| 52 // is fixed. | |
| 53 var blob = xhr.response == null ? new Blob([]) : xhr.response; | |
| 54 var reader = new FileReader(); | |
| 55 | |
| 56 reader.onLoad.first.then((_) { | |
| 57 var body = reader.result; | |
| 58 completer.complete(new StreamedResponse( | |
| 59 new ByteStream.fromBytes(body), | |
| 60 xhr.status, | |
| 61 contentLength: body.length, | |
| 62 request: request, | |
| 63 headers: xhr.responseHeaders, | |
| 64 reasonPhrase: xhr.statusText)); | |
| 65 }); | |
| 66 | |
| 67 reader.onError.first.then((error) { | |
| 68 completer.completeError( | |
| 69 new ClientException(error.toString(), request.url), | |
| 70 new Chain.current()); | |
| 71 }); | |
| 72 | |
| 73 reader.readAsArrayBuffer(blob); | |
| 74 }); | |
| 75 | |
| 76 xhr.onError.first.then((_) { | |
| 77 // Unfortunately, the underlying XMLHttpRequest API doesn't expose any | |
| 78 // specific information about the error itself. | |
| 79 completer.completeError( | |
| 80 new ClientException("XMLHttpRequest error.", request.url), | |
| 81 new Chain.current()); | |
| 82 }); | |
| 83 | |
| 84 xhr.send(bytes); | |
| 85 return completer.future.whenComplete(() => _xhrs.remove(xhr)); | |
| 86 }); | |
| 87 } | |
| 88 | |
| 89 /// Closes the client. | |
| 90 /// | |
| 91 /// This terminates all active requests. | |
| 92 void close() { | |
| 93 for (var xhr in _xhrs) { | |
| 94 xhr.abort(); | |
| 95 } | |
| 96 } | |
| 97 } | |
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Chromium Code Reviews
Issue 810223002:
Remove the http package from the repo. (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart