Flutter_cached_network_image: Error widget not shown when invalid content (no image)

[mishatron]

There is a problem with errorWidget. It is not used when exception like Exception: Could not instantiate image codec.. Steps to reproduce: valid url with invalid content

[aboutmydreams]

this is a big problem for me, hope it fixed early~

[yhcflyy]

I also have the problem,please fix quickly

[bjonnycw]

I also have this problem

I/flutter (13051): The following _Exception was thrown resolving an image codec: I/flutter (13051): Exception: Could not instantiate image codec. I/flutter (13051): I/flutter (13051): When the exception was thrown, this was the stack: I/flutter (13051): #0 _futurize (dart:ui/painting.dart:4397:5) I/flutter (13051): #1 instantiateImageCodec (dart:ui/painting.dart:1718:10) I/flutter (13051): #2 PaintingBinding.instantiateImageCodec (package:flutter/src/painting/binding.dart:88:12) I/flutter (13051): #3 FileImage._loadAsync (package:flutter/src/painting/image_provider.dart:653:24) I/flutter (13051): <asynchronous suspension> I/flutter (13051): #4 FileImage.load (package:flutter/src/painting/image_provider.dart:638:14) I/flutter (13051): #5 ImageProvider.resolve.<anonymous closure>.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:327:17) I/flutter (13051): #6 ImageCache.putIfAbsent (package:flutter/src/painting/image_cache.dart:197:22) I/flutter (13051): #7 ImageProvider.resolve.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:325:84) I/flutter (13051): #8 SynchronousFuture.then (package:flutter/src/foundation/synchronous_future.dart:41:29) I/flutter (13051): #9 ImageProvider.resolve.<anonymous closure> (package:flutter/src/painting/image_provider.dart:323:11) I/flutter (13051): #13 ImageProvider.resolve (package:flutter/src/painting/image_provider.dart:315:16) I/flutter (13051): #14 _ImageState._resolveImage (package:flutter/src/widgets/image.dart:1010:20) I/flutter (13051): #15 _ImageState.didChangeDependencies (package:flutter/src/widgets/image.dart:967:5) I/flutter (13051): #16 StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4482:12) I/flutter (13051): #17 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4307:5) I/flutter (13051): #18 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3297:14) I/flutter (13051): #19 Element.updateChild (package:flutter/src/widgets/framework.dart:3091:12) I/flutter (13051): #20 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5575:14) I/flutter (13051): #21 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3297:14) I/flutter (13051): #22 Element.updateChild (package:flutter/src/widgets/framework.dart:3091:12) I/flutter (13051): #23 RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:5326:32) I/flutter (13051): #24 MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:5694:17) I/flutter (13051): #25 Element.updateChild (package:flutter/src/widgets/framework.dart:3080:15) I/flutter (13051): #26 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4349:16) I/flutter (13051): #27 Element.rebuild (package:flutter/src/widgets/framework.dart:4053:5) I/flutter (13051): #28 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2532:33) I/flutter (13051): #29 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:796:20) I/flutter (13051): #30 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:283:5) I/flutter (13051): #31 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1109:15) I/flutter (13051): #32 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1048:9) I/flutter (13051): #33 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:964:5) I/flutter (13051): #37 _invoke (dart:ui/hooks.dart:260:10) I/flutter (13051): #38 _drawFrame (dart:ui/hooks.dart:218:3) I/flutter (13051): (elided 6 frames from package dart:async)

[miyakeryo]

I use CustomCacheManager.

import 'package:flutter_cache_manager/flutter_cache_manager.dart';
import 'package:http/http.dart' as http;
import 'package:path/path.dart' as p;
import 'package:path_provider/path_provider.dart';

class CustomCacheManager extends BaseCacheManager {
  static const key = "libCachedImageData";

  static CustomCacheManager _instance;

  factory CustomCacheManager() {
    if (_instance == null) _instance = CustomCacheManager._();
    return _instance;
  }

  CustomCacheManager._() : super(key, fileFetcher: _customHttpGetter);

  Future<String> getFilePath() async {
    var directory = await getTemporaryDirectory();
    return p.join(directory.path, key);
  }

  static Future<FileFetcherResponse> _customHttpGetter(String url,
      {Map<String, String> headers}) async {
    final response = await http.get(url, headers: headers);
    if (response.headers['content-type']?.startsWith('image/') == false) {
      throw Exception('Invalid content type');
    }
    return HttpFileFetcherResponse(response);
  }
}

[renefloor]

Interesting idea to give the cachemanager a parameter of supported content types.

[shashikantshaale]

Any fix would help. Please...

[renefloor]

It should be fixed in 2.3.0-beta, would be nice if any of you can validate.

[estevez-dev]

I can confirm it works in 2.3.0-beta

[kennylbj]

When will 2.3.0 be released?

[renefloor]

It is depending on a fix in Flutter 1.19, so I'm waiting for the next stable release of the Flutter SDK. That is the only reason it is still a RC version.

[markst]

Interesting idea to give the cachemanager a parameter of supported content types.

Agreed.

Seems I'm having similar issue with some of our url's such as:
http://airit.org.au/airit/images/P/std_5813.jpg
Which return 200 but HTML rather than image content-type.

2.3.0-beta does appear to display errorWidget however.

[ingluife]

Hi guys,
I'm having a problem related to this issue.
Exception:

 Non-fatal Exception: java.lang.Exception: Bad state: LocalFile: '/data/user/0/com.example.app/cache/libCachedImageData/8ba13070-e817-11ea-91d6-3529a262a8eb.png' is empty and cannot be loaded as an image.
       at FileImage._loadAsync(FileImage.java:883)

It's happening when the application tries to load several images. I have a list view, and this happens when I made a scroll.

I've read this is going to be fixed in the 2.3.0 version.
but, I'm using the pre-release version published on https://pub.dev, and It happens the same.

• Package version:
  cached_network_image: ^2.3.0-rc
• Flutter doctor:

[✓] Flutter (Channel stable, 1.20.2, on Mac OS X 10.15.5 19F101)
    • Flutter version 1.20.2 at /Users/lgonzalez/development/flutter-1.20.2
    • Framework revision bbfbf1770c (2 weeks ago), 2020-08-13 08:33:09 -0700
    • Engine revision 9d5b21729f
    • Dart version 2.9.1
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /Users/lgonzalez/Library/Android/sdk
    • Platform android-29, build-tools 29.0.2
    • ANDROID_HOME = /Users/lgonzalez/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 11.3.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.3.1, Build version 11C504
    • CocoaPods version 1.9.1
[✓] Android Studio (version 4.0)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 48.1.2
    • Dart plugin version 193.7361
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
[✓] VS Code (version 1.48.0)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.13.2

[!] Connected device
    ! No devices available

! Doctor found issues in 1 category.

Regards!

[briankariuki]

Also facing the same issue when using CachedImageProvider in a list view. I'm trying the new version. Will get back if the issue persists for me

[kamleshwebtech]

any update, anyone solved this issue or found solution?