Merge pull request #36 from lewzylu/add-md5-check

Add md5 check

qcloud_cos/cos_client.py

@@ -12,6 +12,7 @@
 import xml.etree.ElementTree
 from requests import Request, Session
 from urllib import quote
+from hashlib import md5
 from streambody import StreamBody
 from xml2dict import Xml2Dict
 from dicttoxml import dicttoxml
@@ -55,7 +56,7 @@ def __init__(self, Appid=None, Region=None, Secret_id=None, Secret_key=None, Tok
         if Scheme is None:
             Scheme = 'http'
         if(Scheme != 'http' and Scheme != 'https'):
-            raise CosCosClientError('Scheme can be only set to http/https')
+            raise CosClientError('Scheme can be only set to http/https')
         self._scheme = Scheme
 
         # 兼容(SecretId,SecretKey)以及(AccessId,AccessKey)
@@ -440,6 +441,10 @@ def upload_part(self, Bucket, Key, Body, PartNumber, UploadId, **kwargs):
                 auth=CosS3Auth(self._conf._secret_id, self._conf._secret_key, Key),
                 data=Body)
         response = dict()
+        logger.debug("local md5: {key}".format(key=rt.headers['ETag'][1:-1]))
+        logger.debug("cos md5: {key}".format(key=md5(Body).hexdigest()))
+        if md5(Body).hexdigest() != rt.headers['ETag'][1:-1]:
+            raise CosClientError("MD5 inconsistencies")
         response['ETag'] = rt.headers['ETag']
         return response
 
@@ -1311,7 +1316,7 @@ def copy(self, Bucket, Key, CopySource, CopyStatus='Copy', PartSize=10, MAXThrea
             abort_response = self.abort_multipart_upload(Bucket=Bucket, Key=Key, UploadId=uploadid)
             raise e
         return rt
-   
+
     def append_object(self, Bucket, Key, Position, Data, **kwargs):
         """文件块追加接口
 
@@ -1341,7 +1346,7 @@ def append_object(self, Bucket, Key, Position, Data, **kwargs):
             headers=headers)
         response = rt.headers
         return response
-      
-      
+
+
 if __name__ == "__main__":
     pass