From a489ae17fbd05902a8bba45343677bdeaf5aaf7c Mon Sep 17 00:00:00 2001
From: hyugogirubato <65763543+hyugogirubato@users.noreply.github.com>
Date: Sun, 19 Oct 2025 19:47:52 +0200
Subject: [PATCH] check invalid file content

---
 cbz/page.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/cbz/page.py b/cbz/page.py
index 4f1a635..cfbfbbc 100644
--- a/cbz/page.py
+++ b/cbz/page.py
@@ -75,6 +75,8 @@ class PageInfo(PageModel):
             data = base64.b64decode(data)
         if not isinstance(data, bytes):
             raise ValueError(f'Expecting Bytes or Base64 input, got {data!r}')
+        if not data.strip():
+            raise ValueError(f'Empty or null data provided (length={len(data)})')
         return cls(data, **kwargs)
 
     @classmethod