def mkstemp(self):
"""Contextmanager to make a temporary file."""
# Creating intermidiate directories and corresponding metadata.
# For optimization, check if the subdirectory already exists,
# if exists, then it means that it also has its metadata.
# Not checking for container, since the container should already
# exist for the call to come here.
if not os_path.exists(self.datadir):
path = self._container_path
subdir_list = self._obj_path.split(os.path.sep)
for i in range(len(subdir_list)):
path = os.path.join(path, subdir_list[i]);
if not os_path.exists(path):
self._create_dir_object(path)
tmpfile = '.' + self._obj + '.' + md5(self._obj + \
str(random.random())).hexdigest()
self.tmppath = os.path.join(self.datadir, tmpfile)
fd = do_open(self.tmppath, os.O_RDWR | os.O_CREAT | os.O_EXCL)
try:
yield fd
finally:
try:
do_close(fd)
except OSError:
pass
tmppath, self.tmppath = self.tmppath, None
try:
do_unlink(tmppath)
except OSError as err:
if err.errno != errno.ENOENT:
raise
def _create_dir_object(self, dir_path):
#TODO: if object already exists???
if os.path.exists(dir_path) and not os.path.isdir(dir_path):
self.logger.error("Deleting file %s", dir_path)
do_unlink(dir_path)
#If dir aleady exist just override metadata.
mkdirs(dir_path)
do_chown(dir_path, self.uid, self.gid)
create_object_metadata(dir_path)
def create_dir_object(self, dir_path):
if os.path.exists(dir_path) and not os.path.isdir(dir_path):
self.logger.error("Deleting file %s", dir_path)
do_unlink(dir_path)
mkdirs(dir_path)
do_chown(dir_path, self.uid, self.gid)
return True
def unlink(self):
"""
Remove the file.
"""
#Marker dir.
if self.is_dir:
rmdirs(os.path.join(self.datadir, self.obj))
if not os.path.isdir(os.path.join(self.datadir, self.obj)):
self.metadata = {}
self.data_file = None
else:
logging.error('Unable to delete dir %s' % os.path.join(self.datadir, self.obj))
return
for fname in do_listdir(self.datadir):
if fname == self.obj:
try:
do_unlink(os.path.join(self.datadir, fname))
except OSError, err:
if err.errno != errno.ENOENT:
raise
def unlink(self):
"""
Remove the file.
"""
#Marker dir.
if self.is_dir:
rmdirs(os.path.join(self.datadir, self.obj))
if not os.path.isdir(os.path.join(self.datadir, self.obj)):
self.metadata = {}
self.data_file = None
else:
logging.error('Unable to delete dir %s' %
os.path.join(self.datadir, self.obj))
return
for fname in do_listdir(self.datadir):
if fname == self.obj:
try:
do_unlink(os.path.join(self.datadir, fname))
except OSError, err:
if err.errno != errno.ENOENT:
raise
def unlinkold(self, timestamp):
"""
Remove any older versions of the object file. Any file that has an
older timestamp than timestamp will be deleted.
:param timestamp: timestamp to compare with each file
"""
if not self.metadata or self.metadata['X-Timestamp'] >= timestamp:
return
assert self.data_file, \
"Have metadata, %r, but no data_file" % self.metadata
if self._is_dir:
# Marker directory object
if not rmdirs(self.data_file):
logging.error('Unable to delete dir object: %s', self.data_file)
return
else:
# File object
do_unlink(self.data_file)
self.metadata = {}
self.data_file = None
def meta_del(self):
if os.path.exists(self.metafile):
do_unlink(self.metafile)
