dart - 捕获角度 Dart 中的任何错误(例如angular的ErrorHandler)

Question

我需要捕获任何前端(angulardart)错误并将其发送回服务器。

我在常规的Angular ErrorHandler中看到了类似他的东西，但是我找不到等效的angart Dart (或自我 Dart )。

也许我应该破解Exception对象的构造函数，但是我发现它不是一种好方法(假设有可能)

有什么提示吗？

Answer 1

在Dart中，它非常相似:

@Injectable()
class ErrorHandler implements ExceptionHandler {
  ApplicationRef _appRef;

  ErrorHandler(Injector injector) {
    // prevent DI circular dependency
    new Future<Null>.delayed(Duration.ZERO, () {
      _appRef = injector.get(ApplicationRef) as ApplicationRef;
    });
  }

  @override
  void call(dynamic exception, [dynamic stackTrace, String reason]) {
    final stackTraceParam = stackTrace is StackTrace
        ? stackTrace
        : (stackTrace is String
            ? new StackTrace.fromString(stackTrace)
            : (stackTrace is List
                ? new StackTrace.fromString(stackTrace.join('\n'))
                : null));
    _log.shout(reason ?? exception, exception, stackTraceParam);

    // We can try to get an error shown, but don't assume the app is
    // in a healthy state after this error handler was reached.
    // You can for example still instruct the user to reload the 
    // page with danger to cause hare because of inconsistent
    // application state..
    // To get changes shown, we need to explicitly invoke change detection. 
    _appRef?.tick();
  }
}

提供错误处理程序

return bootstrap(AppComponent, [const Provide(ExceptionHandler, useClass: ErrorHandler)]);

有关可能在Angular外引起的错误，另请参见 How to catch all uncaught errors in a dart polymer app?