1 files changed, 65 insertions, 0 deletions
diff --git a/nfvparser/src/main/python/toscaparser/utils/urlutils.py b/nfvparser/src/main/python/toscaparser/utils/urlutils.py
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+++ b/nfvparser/src/main/python/toscaparser/utils/urlutils.py
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+#    Licensed 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.
+
+
+from six.moves.urllib.parse import urljoin
+from six.moves.urllib.parse import urlparse
+from toscaparser.common.exception import ExceptionCollector
+from toscaparser.utils.gettextutils import _
+
+try:
+    # Python 3.x
+    import urllib.request as urllib2
+except ImportError:
+    # Python 2.x
+    import urllib2
+
+
+class UrlUtils(object):
+
+    @staticmethod
+    def validate_url(path):
+        """Validates whether the given path is a URL or not.
+
+        If the given path includes a scheme (http, https, ftp, ...) and a net
+        location (a domain name such as www.github.com) it is validated as a
+        URL.
+        """
+        parsed = urlparse(path)
+        if parsed.scheme == 'file':
+            # If the url uses the file scheme netloc will be ""
+            return True
+        else:
+            return bool(parsed.scheme) and bool(parsed.netloc)
+
+    @staticmethod
+    def join_url(url, relative_path):
+        """Builds a new URL from the given URL and the relative path.
+
+        Example:
+          url: http://www.githib.com/openstack/heat
+          relative_path: heat-translator
+          - joined: http://www.githib.com/openstack/heat-translator
+        """
+        if not UrlUtils.validate_url(url):
+            ExceptionCollector.appendException(
+                ValueError(_('"%s" is not a valid URL.') % url))
+        return urljoin(url, relative_path)
+
+    @staticmethod
+    def url_accessible(url):
+        """Validates whether the given URL is accessible.
+
+        Returns true if the get call returns a 200 response code.
+        Otherwise, returns false.
+        """
+        return urllib2.urlopen(url).getcode() == 200