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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 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. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 library service_html; | 5 library service_common; |
6 | 6 |
7 import 'dart:async'; | 7 import 'dart:async'; |
8 import 'dart:convert'; | 8 import 'dart:convert'; |
9 import 'dart:html'; | |
10 | 9 |
11 import 'package:logging/logging.dart'; | 10 import 'package:logging/logging.dart'; |
12 import 'package:observatory/service.dart'; | 11 import 'package:observatory/service.dart'; |
13 | 12 |
14 // Export the service library. | 13 // Export the service library. |
15 export 'package:observatory/service.dart'; | 14 export 'package:observatory/service.dart'; |
16 | 15 |
17 /// Description of a VM target. | 16 /// Description of a VM target. |
18 class WebSocketVMTarget { | 17 class WebSocketVMTarget { |
19 // Last time this VM has been connected to. | 18 // Last time this VM has been connected to. |
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53 } | 52 } |
54 } | 53 } |
55 | 54 |
56 class _WebSocketRequest { | 55 class _WebSocketRequest { |
57 final String id; | 56 final String id; |
58 final Completer<String> completer; | 57 final Completer<String> completer; |
59 _WebSocketRequest(this.id) | 58 _WebSocketRequest(this.id) |
60 : completer = new Completer<String>(); | 59 : completer = new Completer<String>(); |
61 } | 60 } |
62 | 61 |
63 /// The [WebSocketVM] communicates with a Dart VM over WebSocket. The Dart VM | 62 /// Minimal common interface for 'WebSocket' in [dart:io] and [dart:html]. |
64 /// can be embedded in Chromium or standalone. In the case of Chromium, we | 63 abstract class CommonWebSocket { |
65 /// make the service requests via the Chrome Remote Debugging Protocol. | 64 void connect(String address, |
66 class WebSocketVM extends VM { | 65 void onOpen(), |
| 66 void onMessage(dynamic data), |
| 67 void onError(), |
| 68 void onClose()); |
| 69 bool get isOpen; |
| 70 void send(dynamic data); |
| 71 void close(); |
| 72 } |
| 73 |
| 74 /// A [CommonWebSocketVM] communicates with a Dart VM over a CommonWebSocket. |
| 75 /// The Dart VM can be embedded in Chromium or standalone. In the case of |
| 76 /// Chromium, we make the service requests via the Chrome Remote Debugging |
| 77 /// Protocol. |
| 78 abstract class CommonWebSocketVM extends VM { |
67 final Completer _connected = new Completer(); | 79 final Completer _connected = new Completer(); |
68 final Completer _disconnected = new Completer(); | 80 final Completer _disconnected = new Completer(); |
69 final WebSocketVMTarget target; | 81 final WebSocketVMTarget target; |
70 final Map<String, _WebSocketRequest> _delayedRequests = | 82 final Map<String, _WebSocketRequest> _delayedRequests = |
71 new Map<String, _WebSocketRequest>(); | 83 new Map<String, _WebSocketRequest>(); |
72 final Map<String, _WebSocketRequest> _pendingRequests = | 84 final Map<String, _WebSocketRequest> _pendingRequests = |
73 new Map<String, _WebSocketRequest>(); | 85 new Map<String, _WebSocketRequest>(); |
74 int _requestSerial = 0; | 86 int _requestSerial = 0; |
75 WebSocket _webSocket; | 87 bool _hasInitiatedConnect = false; |
76 | 88 |
77 WebSocketVM(this.target) { | 89 CommonWebSocket _webSocket; |
| 90 |
| 91 CommonWebSocketVM(this.target, this._webSocket) { |
78 assert(target != null); | 92 assert(target != null); |
79 } | 93 } |
80 | 94 |
81 void _notifyConnect() { | 95 void _notifyConnect() { |
82 if (!_connected.isCompleted) { | 96 if (!_connected.isCompleted) { |
83 Logger.root.info('WebSocketVM connection opened: ${target.networkAddress}'
); | 97 Logger.root.info('WebSocketVM connection opened: ${target.networkAddress}'
); |
84 _connected.complete(this); | 98 _connected.complete(this); |
85 } | 99 } |
86 } | 100 } |
87 Future get onConnect => _connected.future; | 101 Future get onConnect => _connected.future; |
88 void _notifyDisconnect() { | 102 void _notifyDisconnect() { |
89 if (!_disconnected.isCompleted) { | 103 if (!_disconnected.isCompleted) { |
90 Logger.root.info('WebSocketVM connection error: ${target.networkAddress}')
; | 104 Logger.root.info('WebSocketVM connection error: ${target.networkAddress}')
; |
91 _disconnected.complete(this); | 105 _disconnected.complete(this); |
92 } | 106 } |
93 } | 107 } |
94 Future get onDisconnect => _disconnected.future; | 108 Future get onDisconnect => _disconnected.future; |
95 | 109 |
96 void disconnect() { | 110 void disconnect() { |
97 if (_webSocket != null) { | 111 if (_hasInitiatedConnect) { |
98 _webSocket.close(); | 112 _webSocket.close(); |
99 } | 113 } |
100 _cancelAllRequests(); | 114 _cancelAllRequests(); |
101 _notifyDisconnect(); | 115 _notifyDisconnect(); |
102 } | 116 } |
103 | 117 |
104 Future<String> getString(String id) { | 118 Future<String> getString(String id) { |
105 if (_webSocket == null) { | 119 if (!_hasInitiatedConnect) { |
106 // Create a WebSocket. | 120 _hasInitiatedConnect = true; |
107 _webSocket = new WebSocket(target.networkAddress); | 121 _webSocket.connect( |
108 _webSocket.onClose.listen(_onClose); | 122 target.networkAddress, _onOpen, _onMessage, _onError, _onClose); |
109 _webSocket.onError.listen(_onError); | |
110 _webSocket.onOpen.listen(_onOpen); | |
111 _webSocket.onMessage.listen(_onMessage); | |
112 } | 123 } |
113 return _makeRequest(id); | 124 return _makeRequest(id); |
114 } | 125 } |
115 | 126 |
116 /// Add a request for [id] to pending requests. | 127 /// Add a request for [id] to pending requests. |
117 Future<String> _makeRequest(String id) { | 128 Future<String> _makeRequest(String id) { |
118 assert(_webSocket != null); | 129 assert(_hasInitiatedConnect); |
119 // Create request. | 130 // Create request. |
120 String serial = (_requestSerial++).toString(); | 131 String serial = (_requestSerial++).toString(); |
121 var request = new _WebSocketRequest(id); | 132 var request = new _WebSocketRequest(id); |
122 if (_webSocket.readyState == WebSocket.OPEN) { | 133 if (_webSocket.isOpen) { |
123 // Already connected, send request immediately. | 134 // Already connected, send request immediately. |
124 _sendRequest(serial, request); | 135 _sendRequest(serial, request); |
125 } else { | 136 } else { |
126 // Not connected yet, add to delayed requests. | 137 // Not connected yet, add to delayed requests. |
127 _delayedRequests[serial] = request; | 138 _delayedRequests[serial] = request; |
128 } | 139 } |
129 return request.completer.future; | 140 return request.completer.future; |
130 } | 141 } |
131 | 142 |
132 void _onClose(CloseEvent event) { | 143 void _onClose() { |
133 _cancelAllRequests(); | 144 _cancelAllRequests(); |
134 _notifyDisconnect(); | 145 _notifyDisconnect(); |
135 } | 146 } |
136 | 147 |
137 // WebSocket error event handler. | 148 // WebSocket error event handler. |
138 void _onError(Event) { | 149 void _onError() { |
139 _cancelAllRequests(); | 150 _cancelAllRequests(); |
140 _notifyDisconnect(); | 151 _notifyDisconnect(); |
141 } | 152 } |
142 | 153 |
143 // WebSocket open event handler. | 154 // WebSocket open event handler. |
144 void _onOpen(Event) { | 155 void _onOpen() { |
145 target.lastConnectionTime = new DateTime.now().millisecondsSinceEpoch; | 156 target.lastConnectionTime = new DateTime.now().millisecondsSinceEpoch; |
146 _sendAllDelayedRequests(); | 157 _sendAllDelayedRequests(); |
147 _notifyConnect(); | 158 _notifyConnect(); |
148 } | 159 } |
149 | 160 |
150 // WebSocket message event handler. | 161 // WebSocket message event handler. |
151 void _onMessage(MessageEvent event) { | 162 void _onMessage(dynamic data) { |
152 var map = JSON.decode(event.data); | 163 assert(data is String); // We don't handle binary data, yet. |
| 164 var map = JSON.decode(data); |
153 if (map == null) { | 165 if (map == null) { |
154 Logger.root.severe('WebSocketVM got empty message'); | 166 Logger.root.severe('WebSocketVM got empty message'); |
155 return; | 167 return; |
156 } | 168 } |
157 // Extract serial and response. | 169 // Extract serial and response. |
158 var serial; | 170 var serial; |
159 var response; | 171 var response; |
160 if (target.chrome) { | 172 if (target.chrome) { |
161 if (map['method'] != 'Dart.observatoryData') { | 173 if (map['method'] != 'Dart.observatoryData') { |
162 // ignore devtools protocol spam. | 174 // ignore devtools protocol spam. |
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207 _cancelRequests(_pendingRequests); | 219 _cancelRequests(_pendingRequests); |
208 } | 220 } |
209 if (_delayedRequests.length > 0) { | 221 if (_delayedRequests.length > 0) { |
210 Logger.root.info('Cancelling all delayed requests.'); | 222 Logger.root.info('Cancelling all delayed requests.'); |
211 _cancelRequests(_delayedRequests); | 223 _cancelRequests(_delayedRequests); |
212 } | 224 } |
213 } | 225 } |
214 | 226 |
215 /// Send all delayed requests. | 227 /// Send all delayed requests. |
216 void _sendAllDelayedRequests() { | 228 void _sendAllDelayedRequests() { |
217 assert(_webSocket != null); | 229 assert(_webSocket.isOpen); |
218 if (_delayedRequests.length == 0) { | 230 if (_delayedRequests.length == 0) { |
219 return; | 231 return; |
220 } | 232 } |
221 Logger.root.info('Sending all delayed requests.'); | 233 Logger.root.info('Sending all delayed requests.'); |
222 // Send all delayed requests. | 234 // Send all delayed requests. |
223 _delayedRequests.forEach(_sendRequest); | 235 _delayedRequests.forEach(_sendRequest); |
224 // Clear all delayed requests. | 236 // Clear all delayed requests. |
225 _delayedRequests.clear(); | 237 _delayedRequests.clear(); |
226 } | 238 } |
227 | 239 |
228 /// Send the request over WebSocket. | 240 /// Send the request over WebSocket. |
229 void _sendRequest(String serial, _WebSocketRequest request) { | 241 void _sendRequest(String serial, _WebSocketRequest request) { |
230 assert (_webSocket.readyState == WebSocket.OPEN); | 242 assert (_webSocket.isOpen); |
231 if (!request.id.endsWith('/profile/tag')) { | 243 if (!request.id.endsWith('/profile/tag')) { |
232 Logger.root.info('GET ${request.id} from ${target.networkAddress}'); | 244 Logger.root.info('GET ${request.id} from ${target.networkAddress}'); |
233 } | 245 } |
234 // Mark request as pending. | 246 // Mark request as pending. |
235 assert(_pendingRequests.containsKey(serial) == false); | 247 assert(_pendingRequests.containsKey(serial) == false); |
236 _pendingRequests[serial] = request; | 248 _pendingRequests[serial] = request; |
237 var message; | 249 var message; |
238 // Encode message. | 250 // Encode message. |
239 if (target.chrome) { | 251 if (target.chrome) { |
240 message = JSON.encode({ | 252 message = JSON.encode({ |
241 'id': int.parse(serial), | 253 'id': int.parse(serial), |
242 'method': 'Dart.observatoryQuery', | 254 'method': 'Dart.observatoryQuery', |
243 'params': { | 255 'params': { |
244 'id': serial, | 256 'id': serial, |
245 'query': request.id | 257 'query': request.id |
246 } | 258 } |
247 }); | 259 }); |
248 } else { | 260 } else { |
249 message = JSON.encode({'seq': serial, 'request': request.id}); | 261 message = JSON.encode({'seq': serial, 'request': request.id}); |
250 } | 262 } |
251 // Send message. | 263 // Send message. |
252 _webSocket.send(message); | 264 _webSocket.send(message); |
253 } | 265 } |
254 } | 266 } |
255 | |
256 // A VM that communicates with the service via posting messages from DevTools. | |
257 class PostMessageVM extends VM { | |
258 final Completer _connected = new Completer(); | |
259 final Completer _disconnected = new Completer(); | |
260 void disconnect() { /* nope */ } | |
261 Future get onConnect => _connected.future; | |
262 Future get onDisconnect => _disconnected.future; | |
263 final Map<String, Completer> _pendingRequests = | |
264 new Map<String, Completer>(); | |
265 int _requestSerial = 0; | |
266 | |
267 PostMessageVM() : super() { | |
268 window.onMessage.listen(_messageHandler); | |
269 _connected.complete(this); | |
270 } | |
271 | |
272 void _messageHandler(msg) { | |
273 var id = msg.data['id']; | |
274 var name = msg.data['name']; | |
275 var data = msg.data['data']; | |
276 if (name != 'observatoryData') { | |
277 return; | |
278 } | |
279 var completer = _pendingRequests[id]; | |
280 assert(completer != null); | |
281 _pendingRequests.remove(id); | |
282 completer.complete(data); | |
283 } | |
284 | |
285 Future<String> getString(String path) { | |
286 var idString = '$_requestSerial'; | |
287 Map message = {}; | |
288 message['id'] = idString; | |
289 message['method'] = 'observatoryQuery'; | |
290 message['query'] = '$path'; | |
291 _requestSerial++; | |
292 var completer = new Completer(); | |
293 _pendingRequests[idString] = completer; | |
294 window.parent.postMessage(JSON.encode(message), '*'); | |
295 return completer.future; | |
296 } | |
297 } | |
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