From 4e03901225fef873217913c3573cc85766e0ee67 Mon Sep 17 00:00:00 2001
From: afer <791143125@qq.com>
Date: Wed, 4 Dec 2024 17:19:02 +0800
Subject: [PATCH] 1

1
---
 .../cache_managers/image_cache_manager.dart   | 28 ++++++++++++++++++-
 .../lib/src/compat/file_service_compat.dart   | 16 ++++++-----
 flutter_cache_manager/pubspec.yaml            |  2 +-
 3 files changed, 37 insertions(+), 9 deletions(-)

diff --git a/flutter_cache_manager/lib/src/cache_managers/image_cache_manager.dart b/flutter_cache_manager/lib/src/cache_managers/image_cache_manager.dart
index 614d7d9d..d0c1383a 100644
--- a/flutter_cache_manager/lib/src/cache_managers/image_cache_manager.dart
+++ b/flutter_cache_manager/lib/src/cache_managers/image_cache_manager.dart
@@ -61,6 +61,31 @@ mixin ImageCacheManager on BaseCacheManager {
     _runningResizes.remove(resizedKey);
   }
 
+  Future<bool> getExt(File file) async {
+    if (!await file.exists()) {
+      debugPrint('文件不存在: ${file.path}');
+      return false;
+    }
+    final raf = await file.open();
+    final header = await raf.read(8);
+    await raf.close();
+    final hexString =
+        header.map((byte) => byte.toRadixString(16).padLeft(2, '0')).join('');
+    if (hexString.startsWith('ffd8')) {
+      return true; // JPEG
+    } else if (hexString.startsWith('89504e47')) {
+      return true; // PNG
+    } else if (hexString.startsWith('00000200')) {
+      return true; // TGA
+    } else if (hexString.startsWith('00000100')) {
+      return true; // CUR
+    } else if (hexString.startsWith('00000000')) {
+      return true; // ICO
+    }
+
+    return false; // 不支持的文件类型
+  }
+
   final Map<String, Stream<FileResponse>> _runningResizes = {};
 
   Future<FileInfo> _resizeImageFile(
@@ -69,9 +94,10 @@ mixin ImageCacheManager on BaseCacheManager {
     int? maxWidth,
     int? maxHeight,
   ) async {
+    bool isSupported = await getExt(originalFile.file);
     final originalFileName = originalFile.file.path;
     final fileExtension = originalFileName.split('.').last;
-    if (!supportedFileNames.contains(fileExtension)) {
+    if (isSupported) {
       return originalFile;
     }
 
diff --git a/flutter_cache_manager/lib/src/compat/file_service_compat.dart b/flutter_cache_manager/lib/src/compat/file_service_compat.dart
index 0df201e1..bbd7a6ff 100644
--- a/flutter_cache_manager/lib/src/compat/file_service_compat.dart
+++ b/flutter_cache_manager/lib/src/compat/file_service_compat.dart
@@ -63,13 +63,15 @@ class CompatFileServiceGetResponse implements FileServiceResponse {
 
   @override
   String get fileExtension {
-    var fileExtension = '';
-    final contentTypeHeader = _header(HttpHeaders.contentTypeHeader);
-    if (contentTypeHeader != null) {
-      final contentType = ContentType.parse(contentTypeHeader);
-      fileExtension = contentType.fileExtension;
-    }
-    return fileExtension;
+    // var fileExtension = '';
+    // final contentTypeHeader = _header(HttpHeaders.contentTypeHeader);
+    // if (contentTypeHeader != null) {
+    //   final contentType = ContentType.parse(contentTypeHeader);
+    //   fileExtension = contentType.fileExtension;
+    // }
+    // return fileExtension;
+
+    return '.jpeg';
   }
 
   @override
diff --git a/flutter_cache_manager/pubspec.yaml b/flutter_cache_manager/pubspec.yaml
index 4e49f688..ed849972 100644
--- a/flutter_cache_manager/pubspec.yaml
+++ b/flutter_cache_manager/pubspec.yaml
@@ -22,7 +22,7 @@ dependencies:
   uuid: ^4.4.2
 
 dev_dependencies:
-  build_runner: ^2.4.12
+  build_runner: ^2.4.9
   flutter_lints: ^4.0.0
   flutter_test:
     sdk: flutter