| # 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 |