Fix: Use handle_file() for proper gradio_client file upload

app.py

@@ -29,21 +29,27 @@ def classify_material(image):
 
     try:
         import tempfile
-        from PIL import Image
+        from PIL import Image as PILImage
+        from gradio_client import handle_file
 
         print(f"📤 Calling backend API with image type: {type(image)}")
 
         # Convert PIL Image to temp file for gradio_client
-        if isinstance(image, Image.Image):
-            with tempfile.NamedTemporaryFile(delete=False, suffix='.jpg') as tmp:
-                image.save(tmp.name, 'JPEG')
+        if isinstance(image, PILImage.Image):
+            with tempfile.NamedTemporaryFile(delete=False, suffix='.jpg', mode='wb') as tmp:
+                image.save(tmp, 'JPEG')
                 image_path = tmp.name
         else:
             image_path = image
 
-        # Call protected space API
+        print(f"📤 Sending file: {image_path}")
+
+        # Call protected space API with properly formatted file
         client = get_backend()
-        result = client.predict(image=image_path, api_name="/classify_material")
+        result = client.predict(
+            image=handle_file(image_path),
+            api_name="/classify_material"
+        )
 
         print(f"📥 Backend response: {result}")