diff --git a/examples/async_fetch.py b/examples/async_fetch.py
new file mode 100644
index 00000000..113249ac
--- /dev/null
+++ b/examples/async_fetch.py
@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+"""
+异步抓取文件
+
+https://developer.qiniu.com/kodo/api/1250/batch
+"""
+import requests
+import json
+from qiniu import QiniuMacAuth
+
+
+access_key = ''
+secret_key = ''
+
+#生成鉴权QiniuToken
+auth = QiniuMacAuth(access_key,secret_key)
+body = json.dumps({
+
+})
+url = "http://api-z0.qiniu.com/sisyphus/fetch"
+token = "Qiniu " + auth.token_of_request(method="POST",url = url,body=body,content_type="application/json")
+
+
+header = {
+    "Authorization":token,
+    "Host":"api-<Zone>.qiniu.com",
+    "Content-Type":"application/json"
+}
+
+response = requests.post(url,headers = header,data=body)
+print(response.status_code,response.text)
diff --git a/qiniu/auth.py b/qiniu/auth.py
index c25ad6d0..8829ee7e 100644
--- a/qiniu/auth.py
+++ b/qiniu/auth.py
@@ -72,7 +72,7 @@ def token_with_data(self, data):
         return '{0}:{1}:{2}'.format(
             self.__access_key, self.__token(data), data)
 
-    def token_of_request(self, url, body=None, content_type=None):
+    def token_of_request(self, url,body=None, content_type=None):
         """带请求体的签名（本质上是管理凭证的签名）
 
         Args:
@@ -84,12 +84,16 @@ def token_of_request(self, url, body=None, content_type=None):
             管理凭证
         """
         parsed_url = urlparse(url)
+        print("parsed_url:",parsed_url)
         query = parsed_url.query
+        print("query:",query)
         path = parsed_url.path
+        print("path:",path)
         data = path
         if query != '':
             data = ''.join([data, '?', query])
         data = ''.join([data, "\n"])
+        print('data:',data)
 
         if body:
             mimes = [
@@ -97,6 +101,7 @@ def token_of_request(self, url, body=None, content_type=None):
             ]
             if content_type in mimes:
                 data += body
+        print("body",body)
 
         return '{0}:{1}'.format(self.__access_key, self.__token(data))
 
@@ -231,9 +236,8 @@ def __token(self, data):
     def token_of_request(
             self,
             method,
-            host,
             url,
-            qheaders,
+            qheaders=None,
             content_type=None,
             body=None):
         """
@@ -249,26 +253,22 @@ def token_of_request(
         netloc = parsed_url.netloc
         path = parsed_url.path
         query = parsed_url.query
-
-        if not host:
-            host = netloc
-
         path_with_query = path
         if query != '':
             path_with_query = ''.join([path_with_query, '?', query])
         data = ''.join(["%s %s" %
                         (method, path_with_query), "\n", "Host: %s" %
-                        host, "\n"])
+                        netloc, "\n"])
 
         if content_type:
             data += "Content-Type: %s" % (content_type) + "\n"
+        if qheaders:
+            data += "qheaders: %s" % (qheaders) + "\n"
 
-        data += qheaders
         data += "\n"
 
         if content_type and content_type != "application/octet-stream" and body:
-            data += body.decode(encoding='UTF-8')
-
+            data += body
         return '{0}:{1}'.format(self.__access_key, self.__token(data))
 
     def qiniu_headers(self, headers):