sfa/util/plxrn.py

   1 # specialized Xrn class for PlanetLab
   2 import re
   3 from sfa.util.xrn import Xrn
   4
   5 # temporary helper functions to use this module instead of namespace
   6 def hostname_to_hrn (auth, login_base, hostname):
   7     return PlXrn(auth=auth+'.'+login_base,hostname=hostname).get_hrn()
   8 def slicename_to_hrn (auth_hrn, slicename):
   9     return PlXrn(auth=auth_hrn,slicename=slicename).get_hrn()
  10 def email_to_hrn (auth_hrn, email):
  11     return PlXrn(auth=auth_hrn, email=email).get_hrn()
  12 def hrn_to_pl_slicename (hrn):
  13     return PlXrn(xrn=hrn,type='slice').pl_slicename()
  14 def hrn_to_pl_login_base (hrn):
  15     return PlXrn(xrn=hrn,type='slice').pl_login_base()
  16 def hrn_to_pl_authname (hrn):
  17     return PlXrn(xrn=hrn,type='any').pl_authname()
  18
  19
  20 class PlXrn (Xrn):
  21
  22     @staticmethod
  23     def site_hrn (auth, login_base):
  24         return '.'.join(auth,login_base)
  25
  26     def __init__ (self, auth=None, hostname=None, slicename=None, email=None, **kwargs):
  27         #def hostname_to_hrn(auth_hrn, login_base, hostname):
  28         if hostname is not None:
  29             self.type='node'
  30             # keep only the first part of the DNS name
  31             self.hrn='.'.join( [auth,hostname.split(".")[0] ] )
  32             self.hrn_to_urn()
  33         #def slicename_to_hrn(auth_hrn, slicename):
  34         elif slicename is not None:
  35             self.type='slice'
  36             # split at the first _
  37             parts = slicename.split("_",1)
  38             self.hrn = ".".join([auth] + parts )
  39             self.hrn_to_urn()
  40         #def email_to_hrn(auth_hrn, email):
  41         elif email is not None:
  42             self.type='person'
  43             # keep only the part before '@' and replace special chars into _
  44             self.hrn='.'.join([auth,email.split('@')[0].replace(".", "_").replace("+", "_")])
  45             self.hrn_to_urn()
  46         else:
  47             Xrn.__init__ (self,**kwargs)
  48
  49     #def hrn_to_pl_slicename(hrn):
  50     def pl_slicename (self):
  51         self._normalize()
  52         leaf = self.leaf
  53         leaf = re.sub('[^a-zA-Z0-9]', '', leaf)
  54         return self.pl_login_base() + '_' + leaf
  55
  56     #def hrn_to_pl_authname(hrn):
  57     def pl_authname (self):
  58         self._normalize()
  59         return self.authority[-1]
  60
  61     #def hrn_to_pl_login_base(hrn):
  62     def pl_login_base (self):
  63         self._normalize()
  64         base = self.authority[-1]
  65
  66         # Fix up names of GENI Federates
  67         base = base.lower()
  68         base = re.sub('\\\[^a-zA-Z0-9]', '', base)
  69
  70         if len(base) > 20:
  71             base = base[len(base)-20:]
  72
  73         return base