job.py 文件源码

def _download_byte_range(self, byte_range, retry_exceptions):
        # You can occasionally get socket.errors when downloading
        # chunks from Glacier, so each chunk can be retried up
        # to 5 times.
        for _ in range(5):
            try:
                response = self.get_output(byte_range)
                data = response.read()
                expected_tree_hash = response['TreeHash']
                return data, expected_tree_hash
            except retry_exceptions as e:
                continue
        else:
            raise DownloadArchiveError("There was an error downloading"
                                       "byte range %s: %s" % (byte_range,
                                                              e))