Baseflow / Baseflow/flutter_cached_network_image

CachedNetworkImageProvider: errorListener never fires when running on web

Open
#703 5 comments 5 reactions 0 assignees View on GitHub
Dominant language
Dart
Stars
2.6k
Forks
731
Avg merge
3d 9h
Merged PRs (30d)
1

Description

## 🐛 Bug Report

The `errorListener` of CachedNetworkImageProvider never fires when running on web. It does however fire on all other platforms.
In this example the CachedNetworkImageProvider tries to load an image that does not exist.

```dart
import 'package:flutter/material.dart';
import 'package:cached_network_image/cached_network_image.dart';

void main() {
runApp(const MyApp());
}

class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);

@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'CachedNetworkImageProvider Test',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'CachedNetworkImageProvider Test'),
);
}
}

class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);

final String title;

@override
State createState() => _MyHomePageState();
}

class _MyHomePageState extends State {

ImageProvider _getNetworkImage() {
String url = "https://www.google.com/no-image-here.jpg";

CachedNetworkImageProvider provider = CachedNetworkImageProvider(
url,
errorListener: () {
//this is never called when running on the web!
print("CachedNetworkImageProvider: Image failed to load!");
},
);

return provider;
}

@override
Widget build(BuildContext context) {
ImageProvider provider = _getNetworkImage();
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
CircleAvatar(
radius: 100,
backgroundImage: provider,
)
],
),
),
);
}
}

```

### Expected behavior

The `errorListener` should be called on Chrome, too. Ideally it would also pass the reason of failure into the listener.

### Reproduction steps

Run this project on macOS and on Chrome. On macOS the `errorListener` is called - on Chrome it is not.

[test2.zip](https://github.com/Baseflow/flutter_cached_network_image/files/7889426/test2.zip)

### Configuration

**Version:**

Flutter (Channel stable, 2.8.1, on macOS 12.0.1 21A559 darwin-x64, locale de-DE)
cached_network_image: ^3.2.0
flutter_cache_manager: ^3.3.0

**Platform:**
- [x] Web

Contributor guide

No contributing guide indexed for this repository

Assessment

This issue has not been assessed yet.

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.