diff --git a/README.md b/README.md
index 7064714..d212f66 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,10 @@ docker run -d --name="gh-proxy-py" \
 ### 注意
 
 python版本的机器如果无法正常访问github.io会启动报错，请自行修改静态文件url
-默认配置下clone走github.com.cnpmjs.org，项目文件会走jsDeliver，如需走服务器，修改配置即可
+
+workers版本默认配置下clone走github.com.cnpmjs.org，项目文件会走jsDeliver，如需走服务器，修改配置即可
+
+python版本默认走服务器（2021.3.27更新）
 
 ## Cloudflare Workers计费
 
diff --git a/app/main.py b/app/main.py
index 5ec99ec..4ea38cf 100644
--- a/app/main.py
+++ b/app/main.py
@@ -12,9 +12,9 @@ from urllib3.exceptions import (
     DecodeError, ReadTimeoutError, ProtocolError)
 
 # config
-# git使用cnpmjs镜像、分支文件使用jsDelivr镜像的开关，0为关闭，默认开启
-jsdelivr = 1
-cnpmjs = 1
+# git使用cnpmjs镜像、分支文件使用jsDelivr镜像的开关，0为关闭，默认关闭
+jsdelivr = 0
+cnpmjs = 0
 size_limit = 1024 * 1024 * 1024 * 999  # 允许的文件大小，默认999GB，相当于无限制了 https://github.com/hunshcn/gh-proxy/issues/8
 HOST = '127.0.0.1'  # 监听地址，建议监听本地然后由web服务器反代
 PORT = 80  # 监听端口
@@ -105,25 +105,15 @@ def proxy(u):
         if exp2.match(u):
             u = u.replace('/blob/', '/raw/', 1)
         headers = {}
-        r_headers = {}
-        for i in ['Range', 'User-Agent', 'Accept', 'Content-Type', 'Content-Length', 'Content-Encoding']:
-            if i in request.headers:
-                r_headers[i] = request.headers.get(i)
-        r_headers['Accept-Encoding'] = request.headers.get('Accept-Encoding', 'identity')
+        r_headers = dict(request.headers)
+        if 'Host' in r_headers:
+            r_headers.pop('Host')
         try:
             url = u + request.url.replace(request.base_url, '', 1)
             if url.startswith('https:/') and not url.startswith('https://'):
                 url = 'https://' + url[7:]
             r = requests.request(method=request.method, url=url, data=request.data, headers=r_headers, stream=True)
-            for i in ['Content-Range', 'Content-Type']:
-                if i in r.headers:
-                    headers[i] = r.headers.get(i)
-            if r.status_code == 200:
-                headers = dict(r.headers)
-            try:
-                headers.pop('Transfer-Encoding')
-            except KeyError:
-                pass
+            headers = dict(r.headers)
 
             if 'Content-length' in r.headers and int(r.headers['Content-length']) > size_limit:
                 return redirect(u + request.url.replace(request.base_url, '', 1))