Added utils file.

This file must provide all the utils function, to avoid duplicating
code.

slapos/libnetworkcacheutils.py

+##############################################################################
+#
+# Copyright (c) 2010 ViFiB SARL and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+
+
+import socket
+import urlparse
+import base64
+
+
+def parseUrl(url):
+  info_dict = {}
+  parsed_url = urlparse.urlparse(url)
+  info_dict['header_dict'] = {'Content-Type': 'application/json'}
+  user = parsed_url.username
+  passwd = parsed_url.password
+  if user is not None:
+    authentication_string = '%s:%s' % (user, passwd)
+    base64string = base64.encodestring(authentication_string).strip()
+    info_dict['header_dict']['Authorization'] = 'Basic %s' %\
+      base64string
+
+  info_dict['path'] = parsed_url.path
+  info_dict['host'] = parsed_url.hostname
+  info_dict['scheme'] = parsed_url.scheme
+  info_dict['port'] = parsed_url.port or \
+                          socket.getservbyname(parsed_url.scheme)
+  info_dict['simple_url'] = "%s://%s:%s%s" % \
+                                (info_dict.get('scheme'),
+                                 info_dict.get('host'),
+                                 info_dict.get('port'),
+                                 info_dict.get('path'))
+  return info_dict
+