def _make_blob(self, container: Container, object_name: str) -> Blob:
"""Convert local file name to a Cloud Storage Blob.
:param container: Container instance.
:type container: :class:`.Container`
:param object_name: Filename.
:type object_name: str
:return: Blob instance.
:rtype: :class:`.Blob`
"""
full_path = os.path.join(self.base_path, container.name, object_name)
object_path = pathlib.Path(full_path)
try:
stat = os.stat(str(object_path))
except FileNotFoundError:
raise NotFoundError(messages.BLOB_NOT_FOUND % (object_name,
container.name))
meta_data = {}
content_type = None
content_disposition = None
cache_control = None
try:
attributes = xattr.xattr(full_path)
for attr_key, attr_value in attributes.items():
value_str = None
try:
value_str = attr_value.decode('utf-8')
except UnicodeDecodeError:
pass
if attr_key.startswith(self._OBJECT_META_PREFIX + 'metadata'):
meta_key = attr_key.split('.')[-1]
meta_data[meta_key] = value_str
elif attr_key.endswith('content_type'):
content_type = value_str
elif attr_key.endswith('content_disposition'):
content_disposition = value_str
elif attr_key.endswith('cache_control'):
cache_control = value_str
else:
logger.warning("Unknown file attribute '%s'", attr_key)
except OSError:
logger.warning(messages.LOCAL_NO_ATTRIBUTES)
# TODO: QUESTION: Option to disable checksum for large files?
# TODO: QUESTION: Save a .hash file for each file?
file_hash = file_checksum(full_path, hash_type=self.hash_type)
checksum = file_hash.hexdigest()
etag = hashlib.sha1(full_path.encode('utf-8')).hexdigest()
created_at = datetime.fromtimestamp(stat.st_ctime, timezone.utc)
modified_at = datetime.fromtimestamp(stat.st_mtime, timezone.utc)
return Blob(name=object_path.name, checksum=checksum, etag=etag,
size=stat.st_size, container=container, driver=self,
acl=None, meta_data=meta_data,
content_disposition=content_disposition,
content_type=content_type, cache_control=cache_control,
created_at=created_at, modified_at=modified_at)