Function checksum_from_chunks

src/commoncode/hash.py:232–243

Return a checksum from the content of the iterator of byte strings ``chunks`` with a ``total_length`` combined length using the ``name`` checksum algorithm. The returned checksum is a string as a hexdigest or is base64-encoded is ``base64`` is True.

(chunks, name, total_length=0, base64=False)

def checksum_from_chunks(chunks, name, total_length=0, base64=False):
    """
    Return a checksum from the content of the iterator of byte strings ``chunks`` with a
    ``total_length`` combined length using the ``name`` checksum algorithm. The returned checksum is
    a string as a hexdigest or is base64-encoded is ``base64`` is True.
    """
    hasher = get_hasher_instance_by_name(name=name, total_length=total_length)
    for chunk in chunks:
        hasher.update(chunk)
    if base64:
        return hasher.b64digest()
    return hasher.hexdigest()


def binary_chunks(location, size=FILE_CHUNK_SIZE):