Fix 429 rate-limit crash loop: add exponential backoff retry to HuggingFace login

Agent-Logs-Url: https://github.com/SpinTillYouWin-WheelPulsePro/WheelPulsePro/sessions/0ef43430-1d3b-43d2-9c9b-d0942aab75c0

Co-authored-by: SpinTillYouWin-WheelPulsePro <213299693+SpinTillYouWin-WheelPulsePro@users.noreply.github.com>

README.md

@@ -1,7 +1,7 @@
 ---
 title: WheelPulsePro
-emoji: 🌖
-colorFrom: gray
+emoji: 🎡
+colorFrom: purple
 colorTo: blue
 sdk: gradio
 sdk_version: 5.31.0
@@ -9,4 +9,6 @@ app_file: app.py
 pinned: false
 ---
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# WheelPulsePro
+
+WheelPulsePro — Your interactive wheel experience! This Space handles HuggingFace authentication with automatic retry and exponential backoff to avoid rate-limit crash loops.

app.py

@@ -1,8 +1,47 @@
 from huggingface_hub import login, hf_hub_download
+from huggingface_hub.errors import HfHubHTTPError
 import os
 import sys
+import time
+import logging
+
+logging.basicConfig(level=logging.INFO)
+logger = logging.getLogger(__name__)
+
+
+def safe_hf_login(max_retries=5):
+    """Login to HuggingFace with retry logic and exponential backoff."""
+    token = os.environ.get("HF_TOKEN")
+    if not token:
+        logger.warning("HF_TOKEN not set. Skipping HuggingFace login.")
+        return False
+
+    for attempt in range(max_retries):
+        try:
+            login(token=token)
+            logger.info("Successfully logged in to HuggingFace.")
+            return True
+        except HfHubHTTPError as e:
+            if getattr(getattr(e, "response", None), "status_code", None) == 429:
+                wait_time = min(2 ** attempt * 30, 300)  # 30s, 60s, 120s, 240s, 300s (capped)
+                logger.warning(
+                    f"Rate limited (attempt {attempt + 1}/{max_retries}). "
+                    f"Retrying in {wait_time}s..."
+                )
+                time.sleep(wait_time)
+            else:
+                logger.error(f"HuggingFace login failed: {e}")
+                return False
+        except Exception as e:
+            logger.error(f"Unexpected error during login: {e}")
+            return False
+
+    logger.error("Failed to login after all retries. Continuing without auth.")
+    return False
+
+
+safe_hf_login()
 
-login(token=os.environ.get("HF_TOKEN"))
 repo_id = "Spintillyouwinwheelpulsepro/WheelPulsePro"
 for file in ["app.py", "roulette_data.py"]:
     hf_hub_download(repo_id=repo_id, filename=file, repo_type="model", local_dir=".")