Update app.py

app.py

@@ -38,14 +38,16 @@ def predict(req: PredictRequest):
     try:
         img = None
         
-        # 1. Handle URL Input (with the Wikipedia bypass fix from Task 24!)
         if req.image_url:
+            # This "User-Agent" is the ID card that lets us download images
             headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64)"}
             response = requests.get(req.image_url, stream=True, headers=headers)
+            
             if response.status_code != 200:
-                raise Exception(f"Could not download image. Server returned: {response.status_code}")
+                # This will tell us EXACTLY why it failed (403, 404, etc.)
+                raise Exception(f"External site returned error: {response.status_code}")
+                
             img = Image.open(response.raw).convert("RGB")
-            
         # 2. Handle Base64 Input
         elif req.image:
             b64_data = req.image