

def hex_sha1_of_stream(input_stream, content_length):
    '\n    Returns the 40-character hex SHA1 checksum of the first content_length\n    bytes in the input stream.\n    '
    remaining = content_length
    block_size = (1024 * 1024)
    digest = hashlib.sha1()
    while (remaining != 0):
        to_read = min(remaining, block_size)
        data = input_stream.read(to_read)
        if (len(data) != to_read):
            raise ValueError(('content_length(%s) is more than the size of the file' % content_length))
        digest.update(data)
        remaining -= to_read
    return digest.hexdigest()

dataset/ETHPy150Open Backblaze/B2_Command_Line_Tool/b2/utils.py hex_sha1_of_stream/original