From 7ae5ec65419af2dd358b45527b8e798693aee303 Mon Sep 17 00:00:00 2001
From: g1879 <g1879@qq.com>
Date: Fri, 18 Sep 2020 16:36:02 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96download()=E8=8E=B7=E5=8F=96?=
 =?UTF-8?q?=E6=96=87=E4=BB=B6=E5=A4=A7=E5=B0=8F=E9=80=BB=E8=BE=91?=
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---
 DrissionPage/session_page.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/DrissionPage/session_page.py b/DrissionPage/session_page.py
index 1bfe5ad..9f9ce4d 100644
--- a/DrissionPage/session_page.py
+++ b/DrissionPage/session_page.py
@@ -324,7 +324,8 @@ class SessionPage(object):
 
         # -------------------开始下载-------------------
         # 获取远程文件大小
-        file_size = int(r.headers['Content-Length']) if 'Content-Length' in r.headers else None
+        content_length = tuple(x for x in r.headers if x.lower() == 'content-length')
+        file_size = int(r.headers[content_length]) if content_length else None
         downloaded_size, download_status = 0, False  # 已下载文件大小和下载状态
         try:
             with open(str(full_path), 'wb') as tmpFile: