JsonCacheInfoRepository: FormatException: Unexpected end of input (at character 1) ^

Bắt đầu trong json_cache_info_repository.dart tại JsonCacheInfoRepository._readFile, khoảng dòng 143, và kiểm tra cách một tệp JSON cơ sở dữ liệu rỗng đi đến jsonDecode. Tái hiện hoặc bao quát trường hợp tệp rỗng, sau đó xác minh rằng quá trình khởi tạo hoàn tất mà không có FormatException, đồng thời vẫn giữ nguyên việc tải JSON thông thường.

🐛 Bug Report

occasionally this error is generated when initializing CacheManager with JsonCacheInfoRepository

Fatal Exception: io.flutter.plugins.firebase.crashlytics.FlutterError: FormatException: Unexpected end of input (at character 1)

^

       at .jsonDecode(dart:convert)
       at JsonCacheInfoRepository._readFile(json_cache_info_repository.dart:143)
       at JsonCacheInfoRepository.open(json_cache_info_repository.dart:40)
       at new CacheStore.<fn>(cache_store.dart:34)

This happens when the {databaseName}.json file is created but empty and jsonString = ""

JsonCacheInfoRepository.dart: _readFile()
final json = jsonDecode(jsonString) as List<dynamic>;

A possible solution would be to check that the file is not empty before decoding the json

    if (await file.exists() && await file.length() > 0) {
      try {
        final jsonString = await file.readAsString();
        final json = jsonDecode(jsonString) as List<dynamic>;

note: I don't know why the json file is empty and not with an empty list []

Expected behavior

no error

Configuration

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.16.1, on Microsoft Windows [Versi¢n 10.0.22631.3296], locale es-CL)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[√] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[√] Chrome - develop for the web
[√] Visual Studio - develop Windows apps (Visual Studio Build Tools 2022 17.8.2)
[√] Android Studio (version 2022.3)
[√] VS Code (version 1.87.2)
[√] Connected device (4 available)
[√] Network resources

• No issues found!

Version: 3.3.1

Platform:

• 📱 iOS
• 🤖 Android 13 (AP I33)