1

#!/usr/bin/env python

     2

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

     3

     4

# See COPYING file for copyrights details.

     5

     6

from __future__ import absolute_import

     7

import hashlib

     9

    10

    11

class ConnectorBase(object):

    12

    13

    chuncksize = 1024*1024

    14

    23

    def BlobFromFile(self, filepath, seed):

    24

        s = hashlib.new('md5')

    25

        s.update(seed)

    26

        blobID = self.SeedBlob(seed)

    27

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

    28

            while blobID == s.digest():

    29

                chunk = f.read(self.chuncksize)

    30

                if len(chunk) == 0:

    31

                    return blobID

    32

                blobID = self.AppendChunkToBlob(chunk, blobID)

    33

                s.update(chunk)

    34

        raise IOError("Data corrupted during transfer or connection lost")