-### $Id: namespace.py 15020 2009-09-14 23:11:37Z tmack $
-### $URL: https://svn.planet-lab.org/svn/sfa/trunk/sfa/util/namespace.py $
-
+### $Id$
+### $URL$
+import re
from sfa.util.faults import *
+URN_PREFIX = "urn:publicid:IDN"
def get_leaf(hrn):
parts = hrn.split(".")
return ".".join(parts[-1:])
-def get_authority(hrn):
+def get_authority(xrn):
+ hrn, type = urn_to_hrn(xrn)
+ if type and type == 'authority':
+ return hrn
+
parts = hrn.split(".")
return ".".join(parts[:-1])
"""
Convert hrn to plantelab name.
"""
- genihostname = ".".join([auth_hrn, login_base, hostname.split(".")[0]])
- return genihostname
+ sfa_hostname = ".".join([auth_hrn, login_base, hostname.split(".")[0]])
+ return sfa_hostname
def slicename_to_hrn(auth_hrn, slicename):
"""
def email_to_hrn(auth_hrn, email):
parts = email.split("@")
username = parts[0]
- username = username.replace(".", "_")
+ username = username.replace(".", "_").replace("+", "_")
person_hrn = ".".join([auth_hrn, username])
return person_hrn
+
+def urn_to_hrn(urn):
+ """
+ convert a urn to hrn
+ return a tuple (hrn, type)
+ """
+
+ # if this is already a hrn dont do anything
+ if not urn or not urn.startswith(URN_PREFIX):
+ return urn, None
+
+ name = urn[len(URN_PREFIX):]
+ hrn_parts = name.split("+")
+ type = hrn_parts.pop(2)
+
+
+ # Remove the authority name (e.g. '.sa')
+ if type == 'authority':
+ hrn_parts = hrn_parts[:-1]
+
+ # convert hrn_parts (list) into hrn (str) by doing the following
+ # dont allow special characters (except ':') in the site login base
+ # remove blank elements
+ # replace ':' with '.'
+ # join list elements using '.'
+ only_alphanum = re.compile('[^a-zA-Z0-9:]+')
+ valid_chars = lambda x: only_alphanum.sub('', x).replace(':', '.')
+ hrn = '.'.join([valid_chars(part) for part in hrn_parts if part])
+
+ return str(hrn), str(type)
+
+
+def hrn_to_urn(hrn, type=None):
+ """
+ convert an hrn and type to a urn string
+ """
+ # if this is already a urn dont do anything
+ if not hrn or hrn.startswith(URN_PREFIX):
+ return hrn
+
+ authority = get_authority(hrn)
+ name = get_leaf(hrn)
+
+ if type == 'authority':
+ authority = hrn
+ name = 'sa'
+
+ if authority.startswith("plc"):
+ if type == None:
+ urn = "+".join(['',authority.replace('.',':'),name])
+ else:
+ urn = "+".join(['',authority.replace('.',':'),type,name])
+
+ else:
+ urn = "+".join(['',authority,type,name])
+
+ return URN_PREFIX + urn