Source code for dfvfs.vfs.gzip_file_entry

# -*- coding: utf-8 -*-
"""The gzip file entry implementation."""

from dfdatetime import posix_time as dfdatetime_posix_time

from dfvfs.lib import definitions
from dfvfs.lib import errors
from dfvfs.resolver import resolver
from dfvfs.vfs import root_only_file_entry


[docs] class GzipFileEntry(root_only_file_entry.RootOnlyFileEntry): """File system file entry that uses gzip.""" TYPE_INDICATOR = definitions.TYPE_INDICATOR_GZIP
[docs] def __init__( self, resolver_context, file_system, path_spec, is_root=False, is_virtual=False): """Initializes a file entry. Args: resolver_context (Context): resolver context. file_system (FileSystem): file system. path_spec (PathSpec): path specification. is_root (Optional[bool]): True if the file entry is the root file entry of the corresponding file system. is_virtual (Optional[bool]): True if the file entry is a virtual file Raises: BackEndError: when the gzip file is missing. """ gzip_file = resolver.Resolver.OpenFileObject( path_spec, resolver_context=resolver_context) if not gzip_file: raise errors.BackEndError('Missing gzip file.') super(GzipFileEntry, self).__init__( resolver_context, file_system, path_spec, is_root=is_root, is_virtual=is_virtual) self._gzip_file = gzip_file self.entry_type = definitions.FILE_ENTRY_TYPE_FILE
@property def modification_time(self): """dfdatetime.DateTimeValues: modification time or None if not available.""" timestamps = self._gzip_file.modification_times if not timestamps: return None return dfdatetime_posix_time.PosixTime(timestamp=timestamps[0]) @property def size(self): """int: size of the file entry in bytes or None if not available.""" return self._gzip_file.uncompressed_data_size