Switching a file to a different network during the upload process will cause the upload to terminate and require a long wait for error feedback.

[wahkim]

Package

dio

Version

5.7.0

Operating-System

iOS

Adapter

Default Dio

Output of flutter doctor -v

[✓] Flutter (Channel stable, 3.22.2, on macOS 15.0.1 24A348 darwin-x64, locale zh-Hans-CN)
    • Flutter version 3.22.2 on channel stable at /Users/xxx3/FlutterSDK/flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 761747bfc5 (5 months ago), 2024-06-05 22:15:13 +0200
    • Engine revision edd8546116
    • Dart version 3.4.3
    • DevTools version 2.34.3
    • Pub download mirror https://pub.flutter-io.cn
    • Flutter download mirror https://storage.flutter-io.cn

[✗] Android toolchain - develop for Android devices
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      Install Android Studio from: https://developer.android.com/studio/index.html
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      (or visit https://flutter.dev/docs/get-started/install/macos#android-setup for detailed instructions).
      If the Android SDK has been installed to a custom location, please use
      `flutter config --android-sdk` to update to that location.


[✓] Xcode - develop for iOS and macOS (Xcode 16.0)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Build 16A242d
    • CocoaPods version 1.15.2

[✓] Chrome - develop for the web
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[!] Android Studio (not installed)
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      (or visit https://flutter.dev/docs/get-started/install/macos#android-setup for detailed instructions).

[✓] VS Code (version 1.94.2)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.98.0

[✓] Connected device (4 available)
    • LIN (mobile)      • 00008110-0010193C3E6A801E • ios            • iOS 18.0.1 22A3370
    • macOS (desktop)       • macos                     • darwin-x64     • macOS 15.0.1 24A348 darwin-x64
    • Chrome (web)          • chrome                    • web-javascript • Google Chrome 130.0.6723.70

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 2 categories.

Dart Version

3.4.3

Steps to Reproduce

Switching a file to a different network during the upload process will cause the upload to terminate and require a long wait for error feedback.

Dio dio = new Dio();
      dio.httpClientAdapter = IOHttpClientAdapter(
        createHttpClient: () {
          final client = HttpClient();
          client.badCertificateCallback = (X509Certificate cert, String host, int port) {
            return true;
          };
          client.connectionTimeout = Duration(seconds: 5);
          return client;
        },
      );
      String? contentType = lookupMimeType(filePath);
      dio.options.contentType = contentType;
      File file = File(filePath);
      int fileLength = file.lengthSync();
      var response = await dio.put(
        url,
        data: file.openRead(),
        cancelToken: cancelToken,
        onSendProgress: (count, total) {
          debugPrint('onSendProgress count=${count}, total=${total}');
          onSendProgress?.call(count, total);
        },
        onReceiveProgress: (count, total) {
          debugPrint('onReceiveProgress count=${count}, total=${total}');
        },
        options: Options(contentType: contentType,  headers: {
          Headers.contentLengthHeader: fileLength, 
        }),
      );

      if (response.statusCode == 200) {
        // messageLog(uploadLog);
        if (successImp != null) {
          successImp(url, key);
        }
      } else {
        if (failImp != null) {
          failImp(response.statusCode.toString());
        }
      }
    } catch (e) {
      debugPrint('error=$e, url=$url');
      if (failImp != null) {
        failImp(e);
      }
    }

Expected Result

Switching a file to a different network during the upload process will cause the upload to terminate and require a long wait for error feedback.

Actual Result

Retransmit, or get error feedback quickly.

[AlexV525]

This is managed by the default HTTP client implementation of Dart. We're not network-status-awareness. Switching to other adapters like native_dio_adapter might help in this case.