Create auth.py

auth.py

@@ -0,0 +1,37 @@
+from fastapi import HTTPException, Depends
+from fastapi.security import APIKeyQuery
+from typing import Annotated, Optional
+import os
+import uuid
+
+AUTH_TOKEN = os.getenv("AUTH_TOKEN")
+api_key_query = APIKeyQuery(name="token", auto_error=False)
+
+async def verify_token(token: Annotated[str, Optional[str], Depends(api_key_query)]):
+    if not AUTH_TOKEN:
+        raise HTTPException(
+            status_code=500,
+            detail="AUTH_TOKEN not configured on server"
+        )
+    
+    if not token:
+        raise HTTPException(
+            status_code=401,
+            detail="Token is required"
+        )
+
+    try:
+        uuid.UUID(token)
+    except ValueError:
+        raise HTTPException(
+            status_code=400,
+            detail="Invalid token format. Token must be a valid UUID"
+        )
+    
+    if token != AUTH_TOKEN:
+        raise HTTPException(
+            status_code=401,
+            detail="Invalid token"
+        )
+    
+    return token