🚑 Fix: handle NamedString and ensure bytes are written

app.py

@@ -65,8 +65,20 @@ def process_file(file):
     try:
         ext = os.path.splitext(file.name)[1].lower()
         with tempfile.NamedTemporaryFile(delete=False, suffix=ext) as tmp:
-            file_bytes = file.read() if hasattr(file, "read") else file
-            tmp.write(file_bytes)
+            # Ensure we always write bytes regardless of file type
+	# Ensure we always write bytes regardless of file type
+if hasattr(file, "read"):
+    file_bytes = file.read()
+elif isinstance(file, str):
+    with open(file, "rb") as f:
+        file_bytes = f.read()
+elif isinstance(file, bytes):
+    file_bytes = file
+else:
+    file_bytes = bytes(str(file), encoding='utf-8')  # fallback for NamedString
+
+tmp.write(file_bytes)
+
             tmp.flush()
             full_text = extract_text(tmp.name, ext)