diff --git a/lib/network/images.dart b/lib/network/images.dart
index 29c9005..1c26f89 100644
--- a/lib/network/images.dart
+++ b/lib/network/images.dart
@@ -1,5 +1,6 @@
 import 'dart:typed_data';
 
+import 'package:flutter_qjs/flutter_qjs.dart';
 import 'package:venera/foundation/cache_manager.dart';
 import 'package:venera/foundation/comic_source/comic_source.dart';
 import 'package:venera/foundation/consts.dart';
@@ -83,61 +84,92 @@ class ImageDownloader {
       );
     }
 
+    Future<Map<String, dynamic>?> Function()? onLoadFailed;
+
     var configs = <String, dynamic>{};
     if (sourceKey != null) {
       var comicSource = ComicSource.find(sourceKey);
       configs = (await comicSource!.getImageLoadingConfig
-              ?.call(imageKey, cid, eid)) ?? {};
+              ?.call(imageKey, cid, eid)) ??
+          {};
     }
-    configs['headers'] ??= {
-      'user-agent': webUA,
-    };
+    var retryLimit = 5;
+    while (true) {
+      try {
+        configs['headers'] ??= {
+          'user-agent': webUA,
+        };
 
-    var dio = AppDio(BaseOptions(
-      headers: configs['headers'],
-      method: configs['method'] ?? 'GET',
-      responseType: ResponseType.stream,
-    ));
+        if (configs['onLoadFailed'] is JSInvokable) {
+          onLoadFailed = () async {
+            dynamic result = configs['onLoadFailed']();
+            if (result is Future) {
+              result = await result;
+            }
+            if (result is! Map<String, dynamic>) return null;
+            return result;
+          };
+        }
 
-    var req = await dio.request<ResponseBody>(configs['url'] ?? imageKey,
-        data: configs['data']);
-    var stream = req.data?.stream ?? (throw "Error: Empty response body.");
-    int? expectedBytes = req.data!.contentLength;
-    if (expectedBytes == -1) {
-      expectedBytes = null;
-    }
-    var buffer = <int>[];
-    await for (var data in stream) {
-      buffer.addAll(data);
-      if (expectedBytes != null) {
+        var dio = AppDio(BaseOptions(
+          headers: configs['headers'],
+          method: configs['method'] ?? 'GET',
+          responseType: ResponseType.stream,
+        ));
+
+        var req = await dio.request<ResponseBody>(configs['url'] ?? imageKey,
+            data: configs['data']);
+        var stream = req.data?.stream ?? (throw "Error: Empty response body.");
+        int? expectedBytes = req.data!.contentLength;
+        if (expectedBytes == -1) {
+          expectedBytes = null;
+        }
+        var buffer = <int>[];
+        await for (var data in stream) {
+          buffer.addAll(data);
+          if (expectedBytes != null) {
+            yield ImageDownloadProgress(
+              currentBytes: buffer.length,
+              totalBytes: expectedBytes,
+            );
+          }
+        }
+
+        if (configs['onResponse'] != null) {
+          buffer = configs['onResponse'](buffer);
+        }
+
+        var data = Uint8List.fromList(buffer);
+        buffer.clear();
+
+        if (configs['modifyImage'] != null) {
+          var newData = await modifyImageWithScript(
+            data,
+            configs['modifyImage'],
+          );
+          data = newData;
+        }
+
+        await CacheManager().writeCache(cacheKey, data);
         yield ImageDownloadProgress(
-          currentBytes: buffer.length,
-          totalBytes: expectedBytes,
+          currentBytes: data.length,
+          totalBytes: data.length,
+          imageBytes: data,
         );
+        return;
+      } catch (e) {
+        if(retryLimit < 0 || onLoadFailed == null) {
+          rethrow;
+        }
+        var newConfig = await onLoadFailed();
+        onLoadFailed = null;
+        if(newConfig == null) {
+          rethrow;
+        }
+        configs = newConfig;
+        retryLimit--;
       }
     }
-
-    if (configs['onResponse'] != null) {
-      buffer = configs['onResponse'](buffer);
-    }
-
-    var data = Uint8List.fromList(buffer);
-    buffer.clear();
-
-    if (configs['modifyImage'] != null) {
-      var newData = await modifyImageWithScript(
-        data,
-        configs['modifyImage'],
-      );
-      data = newData;
-    }
-
-    await CacheManager().writeCache(cacheKey, data);
-    yield ImageDownloadProgress(
-      currentBytes: data.length,
-      totalBytes: data.length,
-      imageBytes: data,
-    );
   }
 }