Sentry SDK for Dart

Use this library in your Dart programs (Flutter for mobile, Flutter for web, command-line, and AngularDart) to report errors thrown by your program to https://sentry.io error tracking service.

Versions

Versions 4.0.0 and higher support Flutter (mobile, web, desktop), command-line/server Dart VM, and AngularDart.

Versions below 4.0.0 are deprecated.

Usage

Sign up for a Sentry.io account and get a DSN at http://sentry.io.

Add sentry dependency to your pubspec.yaml:

dependencies:
  sentry: ">=4.0.0 <5.0.0"

In your Dart code, import package:sentry/sentry.dart and create a SentryClient using the DSN issued by Sentry.io:

import 'package:sentry/sentry.dart';

final SentryClient sentry = new SentryClient(dsn: YOUR_DSN);

In an exception handler, call captureException():

main() async {
  try {
    doSomethingThatMightThrowAnError();
  } catch(error, stackTrace) {
    await sentry.captureException(
      exception: error,
      stackTrace: stackTrace,
    );
  }
}

Tips for catching errors

• Use a try/catch block, like in the example above.

• Create a Zone with an error handler, e.g. using runZonedGuarded.

  var sentry = SentryClient(dsn: "https://...");
  // Run the whole app in a zone to capture all uncaught errors.
  runZonedGuarded(
    () => runApp(MyApp()),
    (error, stackTrace) {
      try {
        sentry.captureException(
          exception: error,
          stackTrace: stackTrace,
        );
        print('Error sent to sentry.io: $error');
      } catch (e) {
        print('Sending report to sentry.io failed: $e');
        print('Original error: $error');
      }
    },
  );

• For Flutter-specific errors (such as layout failures), use FlutterError.onError. For example:

  var sentry = SentryClient(dsn: "https://...");
  FlutterError.onError = (details, {bool forceReport = false}) {
    try {
      sentry.captureException(
        exception: details.exception,
        stackTrace: details.stack,
      );
    } catch (e) {
      print('Sending report to sentry.io failed: $e');
    } finally {
      // Also use Flutter's pretty error logging to the device's console.
      FlutterError.dumpErrorToConsole(details, forceReport: forceReport);
    }
  };

• Use Isolate.current.addErrorListener to capture uncaught errors in the root zone.

Found a bug?

Please file it at https://github.com/flutter/flutter/issues/new