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# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
URI utilities.
"""
import os
import urlparse
_IS_WINDOWS = (os.name == 'nt')
def as_file(uri):
"""
If the URI is a file (either the ``file`` scheme or no scheme), then returns the normalized
path. Otherwise, returns ``None``.
"""
if _IS_WINDOWS:
# We need this extra check in Windows before urlparse because paths might have a drive
# prefix, e.g. "C:" which will be considered a scheme for urlparse below
path = uri.replace('/', '\\')
if os.path.exists(path):
return os.path.normpath(path)
url = urlparse.urlparse(uri)
scheme = url.scheme
if (not scheme) or (scheme == 'file'):
path = url.path
if _IS_WINDOWS:
path = path.replace('/', '\\')
return os.path.normpath(path)
return None
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