fix(*): Fix failed to load br compressed image from web request

Some contents (images) in web response is compressed in br format and
dio has no support of that format so the response data is considered
as invalid image data.

This commit added a package to decompress response data when is in br
format.

CHANGELOG.md

@@ -46,6 +46,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - app：修复先前升级flutter版本导致的默认配色问题，现在使用默认的蓝色作为色调。
 - app：修正各类边距值不是Material 3取值的问题。
 - app：修复一些情况下，网络连接报错但UI没有更新的问题。
+- app：修复部分图片无法加载的问题。
 - 翻译：修复部分错误翻译。
 - 帖子：修复部分签名档存在样式溢出的用户的所在楼层无法回复和评分的问题。
 - 帖子：修复帖子评分中头像无法加载时不显示且不断重试的问题。

lib/features/cache/repository/image_cache_repository.dart

@@ -74,10 +74,9 @@ final class ImageCacheRepository with LoggerMixin {
         handle(err);
         throw err;
       }
-      final imageData = respEither.unwrap().data as List<int>;
-      await _imageCacheProvider.updateCache(url, imageData);
-      _controller
-          .add(ImageCacheSuccessResponse(url, Uint8List.fromList(imageData)));
+      final imageData = respEither.unwrap().data as Uint8List;
+      await _imageCacheProvider.updateCache(url, Uint8List.fromList(imageData));
+      _controller.add(ImageCacheSuccessResponse(url, imageData));
     } catch (e) {
       _controller.add(ImageCacheFailedResponse(url));
     }

lib/shared/providers/image_cache_provider/image_cache_provider.dart

@@ -99,7 +99,7 @@ final class ImageCacheProvider with LoggerMixin {
   /// Update image cached file.
   ///
   /// Update cache file and info in database.
-  Future<void> updateCache(String imageUrl, List<int> imageData) async {
+  Future<void> updateCache(String imageUrl, Uint8List imageData) async {
     final fileName = imageUrl.fileNameV5();
 
     // Update image cache info to database.

lib/shared/providers/net_client_provider/net_client_provider.dart

@@ -3,6 +3,7 @@ import 'dart:io' if (dart.libaray.js) 'package:web/web.dart';
 import 'package:cookie_jar/cookie_jar.dart';
 import 'package:dio/dio.dart';
 import 'package:dio/io.dart';
+import 'package:dio_brotli_transformer/dio_brotli_transformer.dart';
 import 'package:dio_cookie_manager/dio_cookie_manager.dart';
 import 'package:tsdm_client/exceptions/exceptions.dart';
 import 'package:tsdm_client/features/settings/repositories/settings_repository.dart';
@@ -95,6 +96,8 @@ final class NetClientProvider with LoggerMixin {
         },
       );
       d.interceptors.add(_ErrorHandler());
+      // decode br content-type.
+      d.transformer = DioBrotliTransformer();
     }
 
     return NetClientProvider._(d);
@@ -104,6 +107,8 @@ final class NetClientProvider with LoggerMixin {
   factory NetClientProvider.buildNoCookie({Dio? dio}) {
     final d = dio ?? getIt.get<SettingsRepository>().buildDefaultDio();
     d.interceptors.add(_ErrorHandler());
+    // decode br content-type.
+    d.transformer = DioBrotliTransformer();
     return NetClientProvider._(d);
   }
 

lib/widgets/cached_image/cached_image_provider.dart

@@ -126,7 +126,7 @@ final class CachedImageProvider extends ImageProvider<CachedImageProvider>
           error('failed to get image from $imageUrl, code=${resp.statusCode}');
           return Uint8List(0);
         }
-        final imageData = resp.data as List<int>;
+        final imageData = resp.data as Uint8List;
 
         // Make cache.
         await getIt.get<ImageCacheProvider>().updateCache(imageUrl, imageData);

pubspec.lock

@@ -86,6 +86,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.1"
+  brotli:
+    dependency: transitive
+    description:
+      name: brotli
+      sha256: "7f891558ed779aab2bed874f0a36b8123f9ff3f19cf6efbee89e18ed294945ae"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.0"
   build:
     dependency: transitive
     description:
@@ -327,6 +335,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.6.0"
+  dio_brotli_transformer:
+    dependency: "direct main"
+    description:
+      name: dio_brotli_transformer
+      sha256: "2ceeaa997a6c2faeda7e1ad1765e87316c9be853fb9892fd0c80c71ca6788e92"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.0"
   dio_cookie_manager:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -23,6 +23,7 @@ dependencies:
   dart_mappable: 4.2.2
   device_info_plus: ^10.1.2
   dio: ^5.6.0
+  dio_brotli_transformer: ^2.0.0
   dio_cookie_manager: ^3.1.1
   drift: ^2.19.1+1
   # For drift