def _OpenFileObject(self, path_spec):
"""Opens the file-like object defined by path specification.
Args:
path_spec: optional the path specification (instance of path.PathSpec).
The default is None.
Returns:
A file-like object.
"""
gzip_file_object = resolver.Resolver.OpenFileObject(
path_spec.parent, resolver_context=self._resolver_context)
try:
self._ReadFileHeader(gzip_file_object)
self._ReadFileFooter(gzip_file_object)
finally:
gzip_file_object.close()
path_spec_data_range = data_range_path_spec.DataRangePathSpec(
range_offset=self._compressed_data_offset,
range_size=self._compressed_data_size, parent=path_spec.parent)
path_spec_compressed_stream = (
compressed_stream_path_spec.CompressedStreamPathSpec(
compression_method=definitions.COMPRESSION_METHOD_DEFLATE,
parent=path_spec_data_range))
return resolver.Resolver.OpenFileObject(
path_spec_compressed_stream, resolver_context=self._resolver_context)
def setUp(self):
"""Sets up the needed objects used throughout the test."""
self._resolver_context = context.Context()
test_file = os.path.join(u'test_data', u'syslog.bz2')
path_spec = os_path_spec.OSPathSpec(location=test_file)
self._compressed_stream_path_spec = (
compressed_stream_path_spec.CompressedStreamPathSpec(
compression_method=definitions.COMPRESSION_METHOD_BZIP2,
parent=path_spec))
def setUp(self):
"""Sets up the needed objects used throughout the test."""
self._resolver_context = context.Context()
test_file = self._GetTestFilePath([u'syslog.lzma'])
self._os_path_spec = os_path_spec.OSPathSpec(location=test_file)
self._compressed_stream_path_spec = (
compressed_stream_path_spec.CompressedStreamPathSpec(
compression_method=definitions.COMPRESSION_METHOD_LZMA,
parent=self._os_path_spec))
def testInitialize(self):
"""Tests the path specification initialization."""
path_spec = compressed_stream_path_spec.CompressedStreamPathSpec(
compression_method=u'test', parent=self._path_spec)
self.assertIsNotNone(path_spec)
with self.assertRaises(ValueError):
_ = compressed_stream_path_spec.CompressedStreamPathSpec(
compression_method=u'test', parent=None)
with self.assertRaises(ValueError):
_ = compressed_stream_path_spec.CompressedStreamPathSpec(
compression_method=None, parent=self._path_spec)
with self.assertRaises(ValueError):
_ = compressed_stream_path_spec.CompressedStreamPathSpec(
compression_method=u'test', parent=self._path_spec, bogus=u'BOGUS')
def GetRootFileEntry(self):
"""Retrieves the root file entry.
Returns:
A file entry (instance of vfs.FileEntry) or None.
"""
path_spec = compressed_stream_path_spec.CompressedStreamPathSpec(
compression_method=self._compression_method,
parent=self._path_spec.parent)
return self.GetFileEntryByPathSpec(path_spec)
def GetRootFileEntry(self):
"""Retrieves the root file entry.
Returns:
CompressedStreamFileEntry: a file entry or None if not available.
"""
path_spec = compressed_stream_path_spec.CompressedStreamPathSpec(
compression_method=self._compression_method,
parent=self._path_spec.parent)
return self.GetFileEntryByPathSpec(path_spec)
def testComparable(self):
"""Tests the path specification comparable property."""
path_spec = compressed_stream_path_spec.CompressedStreamPathSpec(
compression_method=u'test', parent=self._path_spec)
self.assertIsNotNone(path_spec)
expected_comparable = u'\n'.join([
u'type: TEST',
u'type: COMPRESSED_STREAM, compression_method: test',
u''])
self.assertEqual(path_spec.comparable, expected_comparable)
def setUp(self):
"""Sets up the needed objects used throughout the test."""
self._resolver_context = context.Context()
test_file = self._GetTestFilePath(['syslog.bz2'])
path_spec = os_path_spec.OSPathSpec(location=test_file)
self._compressed_stream_path_spec = (
compressed_stream_path_spec.CompressedStreamPathSpec(
compression_method=definitions.COMPRESSION_METHOD_BZIP2,
parent=path_spec))
self._file_system = (
compressed_stream_file_system.CompressedStreamFileSystem(
self._resolver_context))
self._file_system.Open(self._compressed_stream_path_spec)
