| // Copyright (c) 2013, 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. |
| |
| part of observatory; |
| |
| /// A request response interceptor is called for each response. |
| typedef void RequestResponseInterceptor(); |
| |
| abstract class RequestManager extends Observable { |
| ObservatoryApplication _application; |
| ObservatoryApplication get application => _application; |
| RequestResponseInterceptor interceptor; |
| |
| /// The default request prefix is 127.0.0.1 on port 8181. |
| @observable String prefix = 'http://127.0.0.1:8181'; |
| /// List of responses. |
| @observable List<Map> responses = toObservable([]); |
| |
| /// Decode [response] into a map. |
| Map decodeResponse(String response) { |
| var m; |
| try { |
| m = JSON.decode(response); |
| } catch (e, st) { |
| setResponseError('$e $st'); |
| }; |
| return m; |
| } |
| |
| /// Parse |
| void parseResponses(String responseString) { |
| var r = decodeResponse(responseString); |
| if (r == null) { |
| return; |
| } |
| if (r is Map) { |
| setResponses([r]); |
| } else { |
| setResponses(r); |
| } |
| } |
| |
| void setResponses(List<Map> r) { |
| responses = toObservable(r); |
| if (interceptor != null) { |
| interceptor(); |
| } |
| } |
| |
| void setResponseRequestError(HttpRequest request) { |
| String error = '${request.status} ${request.statusText}'; |
| if (request.status == 0) { |
| error = 'No service found. Did you run with --enable-vm-service ?'; |
| } |
| setResponses([{ |
| 'type': 'Error', |
| 'errorType': 'RequestError', |
| 'text': error |
| }]); |
| } |
| |
| void setResponseError(String message) { |
| setResponses([{ |
| 'type': 'Error', |
| 'errorType': 'ResponseError', |
| 'text': message |
| }]); |
| Logger.root.severe(message); |
| } |
| |
| static final RegExp _codeMatcher = new RegExp(r'/isolates/\d+/code/'); |
| static bool isCodeRequest(url) => _codeMatcher.hasMatch(url); |
| static int codeAddressFromRequest(String url) { |
| Match m = _codeMatcher.matchAsPrefix(url); |
| if (m == null) { |
| return 0; |
| } |
| try { |
| var a = int.parse(m.input.substring(m.end), radix: 16); |
| return a; |
| } catch (e) { |
| return 0; |
| } |
| } |
| |
| static final RegExp _isolateMatcher = new RegExp(r"/isolates/\d+"); |
| static String isolatePrefixFromRequest(String url) { |
| Match m = _isolateMatcher.matchAsPrefix(url); |
| if (m == null) { |
| return null; |
| } |
| return m.input.substring(m.start, m.end); |
| } |
| |
| static String isolateIdFromRequest(String url) { |
| var prefix = isolatePrefixFromRequest(url); |
| if (prefix == null) { |
| return null; |
| } |
| // Chop off the '/'. |
| return prefix.substring(1); |
| } |
| |
| static final RegExp _scriptMatcher = new RegExp(r'/isolates/\d+/scripts/.+'); |
| static bool isScriptRequest(url) => _scriptMatcher.hasMatch(url); |
| static final RegExp _scriptPrefixMatcher = |
| new RegExp(r'/isolates/\d+/'); |
| static String scriptUrlFromRequest(String url) { |
| var m = _scriptPrefixMatcher.matchAsPrefix(url); |
| if (m == null) { |
| return null; |
| } |
| return m.input.substring(m.end); |
| } |
| |
| void _setModelResponse(String type, String modelName, dynamic model) { |
| var response = { |
| 'type': type, |
| modelName: model |
| }; |
| setResponses([response]); |
| } |
| |
| /// Handle 'Code' requests |
| void _getCode(String requestString) { |
| var isolateId = isolateIdFromRequest(requestString); |
| if (isolateId == null) { |
| setResponseError('$isolateId is not an isolate id.'); |
| return; |
| } |
| var isolate = _application.isolateManager.getIsolate(isolateId); |
| if (isolate == null) { |
| setResponseError('$isolateId could not be found.'); |
| return; |
| } |
| var address = codeAddressFromRequest(requestString); |
| if (address == 0) { |
| setResponseError('$requestString is not a valid code request.'); |
| return; |
| } |
| var code = isolate.findCodeByAddress(address); |
| if (code != null) { |
| Logger.root.info( |
| 'Found code with 0x${address.toRadixString(16)} in isolate.'); |
| _setModelResponse('Code', 'code', code); |
| return; |
| } |
| request(requestString).then((responseString) { |
| var map = decodeResponse(responseString); |
| if (map == null) { |
| return; |
| } |
| assert(map['type'] == 'Code'); |
| var code = new Code.fromMap(map); |
| Logger.root.info( |
| 'Added code with 0x${address.toRadixString(16)} to isolate.'); |
| isolate.codes.add(code); |
| _setModelResponse('Code', 'code', code); |
| }).catchError(_requestCatchError); |
| } |
| |
| void _getScript(String requestString) { |
| var isolateId = isolateIdFromRequest(requestString); |
| if (isolateId == null) { |
| setResponseError('$isolateId is not an isolate id.'); |
| return; |
| } |
| var isolate = _application.isolateManager.getIsolate(isolateId); |
| if (isolate == null) { |
| setResponseError('$isolateId could not be found.'); |
| return; |
| } |
| var url = scriptUrlFromRequest(requestString); |
| if (url == null) { |
| setResponseError('$requestString is not a valid script request.'); |
| return; |
| } |
| var script = isolate.scripts[url]; |
| if ((script != null) && !script.needsSource) { |
| Logger.root.info('Found script ${script.scriptRef['name']} in isolate'); |
| _setModelResponse('Script', 'script', script); |
| return; |
| } |
| if (script != null) { |
| // The isolate has the script but no script source code. |
| requestMap(requestString).then((response) { |
| assert(response['type'] == 'Script'); |
| script._processSource(response['source']); |
| Logger.root.info( |
| 'Grabbed script ${script.scriptRef['name']} source.'); |
| _setModelResponse('Script', 'script', script); |
| }); |
| return; |
| } |
| // New script. |
| requestMap(requestString).then((response) { |
| assert(response['type'] == 'Script'); |
| var script = new Script.fromMap(response); |
| Logger.root.info( |
| 'Added script ${script.scriptRef['name']} to isolate.'); |
| _setModelResponse('Script', 'script', script); |
| isolate.scripts[url] = script; |
| }); |
| } |
| |
| void _requestCatchError(e, st) { |
| if (e is ProgressEvent) { |
| setResponseRequestError(e.target); |
| } else { |
| setResponseError('$e $st'); |
| } |
| } |
| |
| /// Request [request] from the VM service. Updates [responses]. |
| /// Will trigger [interceptor] if one is set. |
| void get(String requestString) { |
| if (isCodeRequest(requestString)) { |
| _getCode(requestString); |
| return; |
| } |
| if (isScriptRequest(requestString)) { |
| _getScript(requestString); |
| return; |
| } |
| request(requestString).then((responseString) { |
| parseResponses(responseString); |
| }).catchError(_requestCatchError); |
| } |
| |
| /// Abstract method. Given the [requestString], return a String in the |
| /// future which contains the reply from the VM service. |
| Future<String> request(String requestString); |
| |
| Future<Map> requestMap(String requestString) { |
| return request(requestString).then((response) { |
| try { |
| var m = JSON.decode(response); |
| return m; |
| } catch (e) { } |
| return null; |
| }); |
| } |
| } |
| |
| |
| class HttpRequestManager extends RequestManager { |
| Future<String> request(String requestString) { |
| Logger.root.info('Requesting $requestString'); |
| return HttpRequest.getString(prefix + requestString); |
| } |
| } |
| |
| class PostMessageRequestManager extends RequestManager { |
| final Map _outstandingRequests = new Map(); |
| int _requestSerial = 0; |
| PostMessageRequestManager() { |
| window.onMessage.listen(_messageHandler); |
| } |
| |
| void _messageHandler(msg) { |
| var id = msg.data['id']; |
| var name = msg.data['name']; |
| var data = msg.data['data']; |
| if (name != 'observatoryData') { |
| return; |
| } |
| var completer = _outstandingRequests[id]; |
| if (completer != null) { |
| _outstandingRequests.remove(id); |
| print('Completing $id'); |
| completer.complete(data); |
| } else { |
| print('Could not find completer for $id'); |
| } |
| } |
| |
| Future<String> request(String requestString) { |
| var idString = '$_requestSerial'; |
| Map message = {}; |
| message['id'] = idString; |
| message['method'] = 'observatoryQuery'; |
| message['query'] = requestString; |
| _requestSerial++; |
| |
| var completer = new Completer(); |
| _outstandingRequests[idString] = completer; |
| |
| window.parent.postMessage(JSON.encode(message), '*'); |
| return completer.future; |
| } |
| } |