def open(self, path, mode='r', buffering=-1, encoding=None,
errors=None, newline=None, line_buffering=False, **kwargs):
""" Open the named file in the given mode.
This method downloads the file contents into a local temporary
file so that it can be worked on efficiently. Any changes
made to the file are only sent back to cloud storage when
the file is flushed or closed.
@param path: Id of the file to be opened
@param mode: In which mode to open the file
@raise ResourceNotFoundError: If given path doesn't exist and
'w' is not in mode
@return: RemoteFileBuffer object
"""
path = self._normpath(path)
spooled_file = SpooledTemporaryFile(mode=mode, bufsize=MAX_BUFFER)
# Truncate the file if requested
if "w" in mode:
try:
self._update(path, "")
except:
path = self.createfile(path, True)
else:
try:
spooled_file.write(self.client.get_file(path))
spooled_file.seek(0, 0)
except Exception as e:
if "w" not in mode and "a" not in mode:
raise ResourceNotFoundError("%r" % e)
else:
path = self.createfile(path, True)
return RemoteFileBuffer(self, path, mode, spooled_file)
def open(self, path, mode="rb", **kwargs):
"""Open the named file in the given mode.
This method downloads the file contents into a local temporary
file so that it can be worked on efficiently. Any changes
made to the file are only sent back to cloud storage when
the file is flushed or closed.
:param path: Path to the file to be opened
:param mode: In which mode to open the file
:raise ResourceNotFoundError: If given path doesn't exist and
'w' is not in mode
:return: RemoteFileBuffer object
"""
path = abspath(normpath(path))
spooled_file = SpooledTemporaryFile(mode=mode, bufsize=MAX_BUFFER)
if "w" in mode:
# Truncate the file if requested
self.client.put_file(path, "", True)
else:
# Try to write to the spooled file, if path doesn't exist create it
# if 'w' is in mode
try:
spooled_file.write(self.client.get_file(path).read())
spooled_file.seek(0, 0)
except:
if "w" not in mode:
raise ResourceNotFoundError(path)
else:
self.createfile(path, True)
# This will take care of closing the socket when it's done.
return RemoteFileBuffer(self, path, mode, spooled_file)
def open(self, path, mode='r', **kwargs):
if self.isdir(path):
raise ResourceInvalidError(path)
# Erase the contents of a file upon write.
if 'w' in mode:
file_obj = None
self.setcontents(path, StringIO())
else:
file_obj = SpooledTemporaryFile()
self._retrieveFile(path, file_obj)
return RemoteFileBuffer(self, path, mode, file_obj)
def open(self, path, mode='r', buffering=-1, encoding=None,
errors=None, newline=None, line_buffering=False, **kwargs):
"""Open the named file in the given mode.
This method downloads the file contents into a local temporary file so
that it can be worked on efficiently. Any changes made to the file are
only sent back to cloud storage when the file is flushed or closed.
:param path: Id of the file to be opened
:param mode: In which mode to open the file
:raises ResourceNotFoundError: If given path doesn't exist and
'w' is not in mode
:return: RemoteFileBuffer object
"""
path = self._normpath(path)
spooled_file = SpooledTemporaryFile(mode=mode, bufsize=MAX_BUFFER)
# Truncate the file if requested
if "w" in mode:
try:
self._update(path, "")
except:
path = self.createfile(path, True)
else:
try:
spooled_file.write(self.client.get_file(path))
spooled_file.seek(0, 0)
except Exception as e:
if "w" not in mode and "a" not in mode:
raise ResourceNotFoundError("%r" % e)
else:
path = self.createfile(path, True)
return RemoteFileBuffer(self, path, mode, spooled_file)
def open(self, path, mode="rb", **kwargs):
"""Open the named file in the given mode.
This method downloads the file contents into a local temporary
file so that it can be worked on efficiently. Any changes
made to the file are only sent back to cloud storage when
the file is flushed or closed.
:param path: Path to the file to be opened
:param mode: In which mode to open the file
:raise ResourceNotFoundError: If given path doesn't exist and
'w' is not in mode
:return: RemoteFileBuffer object
"""
path = abspath(normpath(path))
spooled_file = SpooledTemporaryFile(mode=mode, bufsize=MAX_BUFFER)
if "w" in mode:
# Truncate the file if requested
self.client.put_file(path, "", True)
else:
# Try to write to the spooled file, if path doesn't exist create it
# if 'w' is in mode
try:
spooled_file.write(self.client.get_file(path).read())
spooled_file.seek(0, 0)
except:
if "w" not in mode:
raise ResourceNotFoundError(path)
else:
self.createfile(path, True)
# This will take care of closing the socket when it's done.
return RemoteFileBuffer(self, path, mode, spooled_file)
def __init__(self, fs, path, mode, rfile=None, write_on_flush=True):
"""RemoteFileBuffer constructor.
The owning filesystem, path and mode must be provided. If the
optional argument 'rfile' is provided, it must be a read()-able
object or a string containing the initial file contents.
"""
wrapped_file = SpooledTemporaryFile(max_size=self.max_size_in_memory)
self.fs = fs
self.path = path
self.write_on_flush = write_on_flush
self._changed = False
self._readlen = 0 # How many bytes already loaded from rfile
self._rfile = None # Reference to remote file object
self._eof = False # Reached end of rfile?
if getattr(fs, "_lock", None) is not None:
self._lock = fs._lock.__class__()
else:
self._lock = threading.RLock()
if "r" in mode or "+" in mode or "a" in mode:
if rfile is None:
# File was just created, force to write anything
self._changed = True
self._eof = True
if not hasattr(rfile, "read"):
#rfile = StringIO(unicode(rfile))
rfile = StringIO(rfile)
self._rfile = rfile
else:
# Do not use remote file object
self._eof = True
self._rfile = None
self._changed = True
if rfile is not None and hasattr(rfile, "close"):
rfile.close()
super(RemoteFileBuffer, self).__init__(wrapped_file, mode)
# FIXME: What if mode with position on eof?
if "a" in mode:
# Not good enough...
self.seek(0, SEEK_END)
def __init__(self,
fs,
filename,
mode,
handler,
close_callback,
write_on_flush=True,
debug=0):
self.debug = debug
self.fs = fs
self.filename = filename
self.mode = mode
self.ccasclient = handler
self.close_callback = close_callback
self.write_on_flush = write_on_flush
self.offset = 0
self.op = None
wrapped_file = SpooledTemporaryFile(max_size=self.max_size_in_memory)
self._changed = False
self._readlen = 0 # How many bytes already loaded from rfile
self._eof = False # Reached end of rfile?
if getattr(fs, "_lock", None) is not None:
self._lock = fs._lock.__class__()
else:
self._lock = threading.RLock()
if "r" in mode or "+" in mode or "a" in mode:
if not self.ccasclient.exists(self.filename):
# File was just created, force to write anything
self.op = 'write'
self._changed = True
self._eof = True
else:
# Do not use remote file object
self.op = 'write'
self._eof = True
self._changed = True
super(RemoteFileBuffer, self).__init__(wrapped_file, mode)
# FIXME: What if mode with position on eof?
if "a" in mode:
# Not good enough...
self.seek(0, SEEK_END)
