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# (C) Copyright 2007-2023 Enthought, Inc., Austin, TX
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
# the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
#
# Thanks for using Enthought open source!
""" A resource protocol for a local file system. """
# Standard library imports.
import errno
# Enthought library imports.
from traits.api import HasTraits, provides
# Local imports.
from .i_resource_protocol import IResourceProtocol
from .no_such_resource_error import NoSuchResourceError
@provides(IResourceProtocol)
class FileResourceProtocol(HasTraits):
"""A resource protocol for a local file system."""
###########################################################################
# 'IResourceProtocol' interface.
###########################################################################
def file(self, address):
"""Return a readable file-like object for the specified address."""
# Opened in binary mode to be consistent with package resources. This
# means, for example, that line-endings will not be converted.
try:
f = open(address, "rb")
except IOError as e:
if e.errno == errno.ENOENT:
raise NoSuchResourceError(address)
else:
raise
return f
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