| // Copyright (c) 2015, 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. |
| |
| import 'dart:async'; |
| import 'dart:io'; |
| |
| import 'package:path/path.dart' as p; |
| |
| import '../../util/io.dart'; |
| import 'browser.dart'; |
| |
| // TODO(nweiz): move this into its own package? |
| /// A class for running an instance of Chrome. |
| /// |
| /// Most of the communication with the browser is expected to happen via HTTP, |
| /// so this exposes a bare-bones API. The browser starts as soon as the class is |
| /// constructed, and is killed when [close] is called. |
| /// |
| /// Any errors starting or running the process are reported through [onExit]. |
| class Chrome extends Browser { |
| final name = "Chrome"; |
| |
| final Future<Uri> remoteDebuggerUrl; |
| |
| /// Starts a new instance of Chrome open to the given [url], which may be a |
| /// [Uri] or a [String]. |
| /// |
| /// If [executable] is passed, it's used as the Chrome executable. Otherwise |
| /// the default executable name for the current OS will be used. |
| factory Chrome(url, {String executable, bool debug: false}) { |
| var remoteDebuggerCompleter = new Completer<Uri>.sync(); |
| return new Chrome._(() async { |
| if (executable == null) executable = _defaultExecutable(); |
| |
| var tryPort = ([int port]) async { |
| var dir = createTempDir(); |
| var args = [ |
| "--user-data-dir=$dir", |
| url.toString(), |
| "--disable-extensions", |
| "--disable-popup-blocking", |
| "--bwsi", |
| "--no-first-run", |
| "--no-default-browser-check", |
| "--disable-default-apps", |
| "--disable-translate", |
| ]; |
| |
| // Currently, Chrome doesn't provide any way of ensuring that this port |
| // was successfully bound. It produces an error if the binding fails, |
| // but without a reliable and fast way to tell if it succeeded that |
| // doesn't provide us much. It's very unlikely that this port will fail, |
| // though. |
| if (port != null) args.add("--remote-debugging-port=$port"); |
| |
| var process = await Process.start(executable, args); |
| |
| if (port != null) { |
| remoteDebuggerCompleter.complete( |
| getRemoteDebuggerUrl(Uri.parse("http://localhost:$port"))); |
| } else { |
| remoteDebuggerCompleter.complete(null); |
| } |
| |
| process.exitCode |
| .then((_) => new Directory(dir).deleteSync(recursive: true)); |
| |
| return process; |
| }; |
| |
| if (!debug) return tryPort(); |
| return getUnusedPort/*<Future<Process>>*/(tryPort); |
| }, remoteDebuggerCompleter.future); |
| } |
| |
| Chrome._(Future<Process> startBrowser(), this.remoteDebuggerUrl) |
| : super(startBrowser); |
| |
| /// Return the default executable for the current operating system. |
| static String _defaultExecutable() { |
| if (Platform.isMacOS) { |
| return '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome'; |
| } |
| if (!Platform.isWindows) return 'google-chrome'; |
| |
| // Chrome could be installed in several places on Windows. The only way to |
| // find it is to check. |
| var prefixes = [ |
| Platform.environment['LOCALAPPDATA'], |
| Platform.environment['PROGRAMFILES'], |
| Platform.environment['PROGRAMFILES(X86)'] |
| ]; |
| var suffix = r'Google\Chrome\Application\chrome.exe'; |
| |
| for (var prefix in prefixes) { |
| if (prefix == null) continue; |
| |
| var path = p.join(prefix, suffix); |
| if (new File(p.join(prefix, suffix)).existsSync()) return path; |
| } |
| |
| // Fall back on looking it up on the path. This probably won't work, but at |
| // least it will fail with a useful error message. |
| return "chrome.exe"; |
| } |
| } |