1 #!/usr/bin/env python

     2 # -*- coding: utf-8 -*-

     3 

     4 # See COPYING file for copyrights details.

     5 

     6 import md5

     7 

     8 class ConnectorBase(object):

     9 

    10     chuncksize = 16384

    11     def BlobFromFile(self, filepath): 

    12         s = md5.new()

    13         blobID = s.digest()  # empty md5, to support empty blob

    14         with open(filepath, "rb") as f:

    15             while True:

    16                 chunk = f.read(self.chuncksize) 

    17                 if len(chunk) == 0: return blobID

    18                 blobID = self.AppendChunkToBlob(chunk, blobID)

    19                 s.update(chunk)

    20                 if blobID != s.digest(): return None

    21