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Baseflow · Dec 4, 2024 · 4e03901 · 4e03901
1 parent 54904e4
commit 4e03901
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Showing 3 changed files with 37 additions and 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
@@ -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
@@ -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
@@ -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