Xtykutl

Currently, OSS can return the 64-bit CRC value for an object uploaded in any mode on Alibaba Cloud OSS. To check the data integrity, I can compare the 64-bit CRC value with the locally calculated value.

Below is a Python code which shows how to check data transmission integrity based on the 64-bit CRC value.

import oss2

from oss2.models import PartInfo

import os

import crcmod

import random

import string

do_crc64 = crcmod.mkCrcFun(0x142F0E1EBA9EA3693L, initCrc=0L, xorOut=0xffffffffffffffffL, rev=True)

def check_crc64(local_crc64, oss_crc64, msg="check crc64"):

if local_crc64 ! = oss_crc64:

print "{0} check crc64 failed. local:{1}, oss:{2}.".format(msg, local_crc64, oss_crc64)

return False

else:

print "{0} check crc64 ok.".format(msg)

return True

def random_string(length):

return ''.join(random.choice(string.lowercase) for i in range(length))

bucket = oss2. Bucket(oss2. Auth(access_key_id, access_key_secret), endpoint, bucket_name)

How can i verify Put / Get objects values in Python.

I appreciate any assistance with this.