diff --git a/app/services/book_service.py b/app/services/book_service.py
index a90875f..92aee83 100644
--- a/app/services/book_service.py
+++ b/app/services/book_service.py
@@ -90,13 +90,13 @@ class BookService:
 
     @retry(stop=stop_after_attempt(3))
     def download_file(self, file_url, dir_name, file_name):  # 下载文件
-        file_res = self.session.get(file_url, stream=True)
-        file_res.raise_for_status()
-        print(f"下载状态码：{file_res.status_code} {file_url}")
+        response = self.session.get(file_url, stream=True)
+        response.raise_for_status()
+        print(f"下载状态码：{response.status_code} {file_url}")
         print(dir_name + "/" + file_name)
-        if self.isDownloadTarget(file_res):
+        if self.isDownloadTarget(response):
             with open(f"download/{self.setting["targetDate"]}/{dir_name}/{file_name}", 'wb') as file2:
-                for chunk in file_res.iter_content(chunk_size=1024):
+                for chunk in response.iter_content(chunk_size=1024):
                     if chunk:
                         file2.write(chunk)
             yield f"data: {self.setting["targetDate"]} {file_name}\n\n"