1 files changed, 48 insertions, 0 deletions
diff --git a/azure/aria/aria-extension-cloudify/src/aria/aria/utils/uris.py b/azure/aria/aria-extension-cloudify/src/aria/aria/utils/uris.py
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index 0000000..49881f2
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+++ b/azure/aria/aria-extension-cloudify/src/aria/aria/utils/uris.py
@@ -0,0 +1,48 @@
+# 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