def read(self, n=-1):
"""Reads ``n`` bytes from the file.
If ``n`` is not specified or is ``-1`` the whole
file content is read in memory and returned
"""
if self._data is _marker:
file_id = DBSession.merge(self).file_id
self._data = DBSession.query(DBStoredFile.data).filter_by(file_id=file_id).scalar()
if n == -1:
result = self._data[self._cursor :]
else:
result = self._data[self._cursor : self._cursor + n]
self._cursor += len(result)
return result
def read(self, n=-1):
"""Reads ``n`` bytes from the file.
If ``n`` is not specified or is ``-1`` the whole
file content is read in memory and returned
"""
if self._data is _marker:
file_id = DBSession.merge(self).file_id
self._data = DBSession.query(DBStoredFile.data).\
filter_by(file_id=file_id).scalar()
if n == -1:
result = self._data[self._cursor:]
else:
result = self._data[self._cursor:self._cursor + n]
self._cursor += len(result)
return result
