Merge pull request #50 from dt3310321/s3

support py2 and py3

Author: dt3310321

README.rst

@@ -4,7 +4,7 @@ Qcloud COSv5 SDK
 介绍
 _______
 
-腾讯云COSV5Python SDK, 目前可以支持Python2.6与Python2.7。
+腾讯云COSV5Python SDK, 目前可以支持Python2.6与Python2.7以及Python3.x。
 
 安装指南
 __________

qcloud_cos/cos_auth.py

@@ -1,13 +1,12 @@
 # -*- coding: utf-8 -*-
 
+from six.moves.urllib.parse import quote, unquote, urlparse, urlencode
 import hmac
 import time
-import urllib
 import hashlib
 import logging
-from urllib import quote
-from urlparse import urlparse
 from requests.auth import AuthBase
+from .cos_comm import to_unicode, to_bytes
 logger = logging.getLogger(__name__)
 
 
@@ -18,62 +17,53 @@ def filter_headers(data):
     :return(dict): 计算进签名的头部.
     """
     headers = {}
-    for i in data.keys():
+    for i in data:
         if i == 'Content-Type' or i == 'Host' or i[0] == 'x' or i[0] == 'X':
             headers[i] = data[i]
     return headers
 
 
-def to_string(data):
-    """转换unicode为string.
-
-    :param data(unicode|string): 待转换的unicode|string.
-    :return(string): 转换后的string.
-    """
-    if isinstance(data, unicode):
-        return data.encode('utf8')
-    return data
-
-
 class CosS3Auth(AuthBase):
 
-    def __init__(self, secret_id, secret_key, key='', params={}, expire=10000):
-        self._secret_id = to_string(secret_id)
-        self._secret_key = to_string(secret_key)
+    def __init__(self, secret_id, secret_key, key=None, params={}, expire=10000):
+        self._secret_id = secret_id
+        self._secret_key = secret_key
         self._expire = expire
         self._params = params
         if key:
-            if key[0] == '/':
+            key = to_unicode(key)
+            if key[0] == u'/':
                 self._path = key
             else:
-                self._path = '/' + key
+                self._path = u'/' + key
         else:
-            self._path = '/'
+            self._path = u'/'
 
     def __call__(self, r):
         path = self._path
         uri_params = self._params
         headers = filter_headers(r.headers)
         uri_params = dict([(k.lower(), v) for k, v in uri_params.items()])
         # reserved keywords in headers urlencode are -_.~, notice that / should be encoded and space should not be encoded to plus sign(+)
-        headers = dict([(k.lower(), quote(v, '-_.~')) for k, v in headers.items()])  # headers中的key转换为小写，value进行encode
-        format_str = "{method}\n{host}\n{params}\n{headers}\n".format(
+        headers = dict([(k.lower(), quote(to_bytes(v), '-_.~')) for k, v in headers.items()])  # headers中的key转换为小写，value进行encode
+        uri_params = dict([(k.lower(), v) for k, v in uri_params.items()])
+        format_str = u"{method}\n{host}\n{params}\n{headers}\n".format(
             method=r.method.lower(),
             host=path,
-            params=urllib.urlencode(sorted(uri_params.items())).replace('+', '%20'),
-            headers='&'.join(map(lambda (x, y): "%s=%s" % (x, y), sorted(headers.items())))
+            params=urlencode(sorted(uri_params.items())).replace('+', '%20'),
+            headers='&'.join(map(lambda tupl: "%s=%s" % (tupl[0], tupl[1]), sorted(headers.items())))
         )
         logger.debug("format str: " + format_str)
 
         start_sign_time = int(time.time())
         sign_time = "{bg_time};{ed_time}".format(bg_time=start_sign_time-60, ed_time=start_sign_time+self._expire)
         sha1 = hashlib.sha1()
-        sha1.update(format_str)
+        sha1.update(to_bytes(format_str))
 
         str_to_sign = "sha1\n{time}\n{sha1}\n".format(time=sign_time, sha1=sha1.hexdigest())
         logger.debug('str_to_sign: ' + str(str_to_sign))
-        sign_key = hmac.new(self._secret_key, sign_time, hashlib.sha1).hexdigest()
-        sign = hmac.new(sign_key, str_to_sign, hashlib.sha1).hexdigest()
+        sign_key = hmac.new(to_bytes(self._secret_key), to_bytes(sign_time), hashlib.sha1).hexdigest()
+        sign = hmac.new(to_bytes(sign_key), to_bytes(str_to_sign), hashlib.sha1).hexdigest()
         logger.debug('sign_key: ' + str(sign_key))
         logger.debug('sign: ' + str(sign))
         sign_tpl = "q-sign-algorithm=sha1&q-ak={ak}&q-sign-time={sign_time}&q-key-time={key_time}&q-header-list={headers}&q-url-param-list={params}&q-signature={sign}"