def seek(self, offset):
if self._file is None:
raise FileClosedError("File closed")
try:
self._file.seek(offset, SEEK_SET)
except IOError, e:
cls = self._errorLookup.get(e[0], FileError)
raise cls("Failed to seek in file '%s': %s" % (self._path, str(e)))
def tell(self):
if self._file is None:
raise FileClosedError("File closed")
try:
return self._file.tell()
except IOError, e:
cls = self._errorLookup.get(e[0], FileError)
raise cls("Failed to tell position in file '%s': %s" %
(self._path, str(e)))
def read(self, size):
if self._file is None:
raise FileClosedError("File closed")
try:
data = self._file.read(size)
return defer.succeed(data)
except IOError, e:
cls = self._errorLookup.get(e[0], FileError)
return defer.fail(
cls("Failed to read data from %s: %s" % (self._path, str(e))))
def read(self, size):
if self._delegate is None:
raise FileClosedError("File closed")
try:
d = self._delegate.read(size, self.stats)
if isinstance(d, defer.Deferred):
return d
return defer.succeed(d)
except IOError, e:
cls = errnoLookup.get(e.errno, FileError)
return defer.fail(cls("Failed to read cached data: %s", str(e)))
def seek(self, offset):
if self._delegate is None:
raise FileClosedError("File closed")
return self._delegate.seek(offset)
def tell(self):
if self._delegate is None:
raise FileClosedError("File closed")
return self._delegate.tell()
def getsize(self):
if self._delegate is None:
raise FileClosedError("File closed")
return self._delegate.size
def getmtime(self):
if self._file is None:
raise FileClosedError("File closed")
# The modification time is not supposed to change over time
return self._info[stat.ST_MTIME]
def getsize(self):
if self._file is None:
raise FileClosedError("File closed")
# The size is not supposed to change over time
return self._info[stat.ST_SIZE]