fix picture upload

backend/apps/generation/views.py

@@ -2726,8 +2726,10 @@ def _assets_api_call(func, *args, **kwargs):
         return result, None
     except AssetsAPIError as e:
         logger.warning('Assets API error: %s', e)
+        # Surface readable message for known parameter errors
+        msg = e.api_message if hasattr(e, 'api_message') else str(e)
         return None, Response(
-            {'error': 'assets_api_error', 'message': '素材服务暂时不可用，请稍后重试'},
+            {'error': 'assets_api_error', 'message': msg},
             status=status.HTTP_502_BAD_GATEWAY,
         )
     except Exception as e:
@@ -2775,6 +2777,27 @@ def asset_groups_view(request):
     if not file:
         return Response({'error': '请上传一张素材图片'}, status=status.HTTP_400_BAD_REQUEST)
 
+    # Validate image dimensions (Volcano Assets API requires 300-6000px)
+    try:
+        from PIL import Image
+        img = Image.open(file)
+        w, h = img.size
+        if w < 300 or h < 300:
+            return Response(
+                {'error': f'图片尺寸太小（{w}x{h}），宽高均需 ≥ 300px'},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+        if w > 6000 or h > 6000:
+            return Response(
+                {'error': f'图片尺寸太大（{w}x{h}），宽高均需 ≤ 6000px'},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+        file.seek(0)  # Reset after PIL read
+    except ImportError:
+        pass  # Pillow not installed, skip validation
+    except Exception:
+        pass  # Not an image or corrupted, let TOS handle it
+
     # Upload to TOS
     try:
         tos_url = tos_upload(file, folder='assets')
@@ -2917,6 +2940,27 @@ def asset_group_add_asset_view(request, group_id):
     if not file:
         return Response({'error': '请上传文件'}, status=status.HTTP_400_BAD_REQUEST)
 
+    # Validate image dimensions (Volcano Assets API requires 300-6000px)
+    try:
+        from PIL import Image
+        img = Image.open(file)
+        w, h = img.size
+        if w < 300 or h < 300:
+            return Response(
+                {'error': f'图片尺寸太小（{w}x{h}），宽高均需 ≥ 300px'},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+        if w > 6000 or h > 6000:
+            return Response(
+                {'error': f'图片尺寸太大（{w}x{h}），宽高均需 ≤ 6000px'},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+        file.seek(0)
+    except ImportError:
+        pass
+    except Exception:
+        pass
+
     name = request.data.get('name', '').strip() or file.name
 
     # Upload to TOS

backend/requirements.txt

@@ -8,3 +8,4 @@ tos>=2.7,<3.0
 requests>=2.31,<3.0
 ip-region>=1.0
 volcengine>=1.0.218
+Pillow>=10.0