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 hostname_to_urn(auth, login_base, hostname):
   9     return PlXrn(auth=auth+'.'+login_base,hostname=hostname).get_urn()
  10 def slicename_to_hrn (auth_hrn, slicename):
  11     return PlXrn(auth=auth_hrn,slicename=slicename).get_hrn()
  12 def email_to_hrn (auth_hrn, email):
  13     return PlXrn(auth=auth_hrn, email=email).get_hrn()
  14 def hrn_to_pl_slicename (hrn):
  15     return PlXrn(xrn=hrn,type='slice').pl_slicename()
  16 def hrn_to_pl_login_base (hrn):
  17     return PlXrn(xrn=hrn,type='slice').pl_login_base()
  18 def hrn_to_pl_authname (hrn):
  19     return PlXrn(xrn=hrn,type='any').pl_authname()
  20 def xrn_to_hostname(hrn):
  21     return Xrn.unescape(PlXrn(xrn=hrn, type='node').get_leaf())
  22
  23 class PlXrn (Xrn):
  24
  25     @staticmethod
  26     def site_hrn (auth, login_base):
  27         return '.'.join([auth,login_base])
  28
  29     def __init__ (self, auth=None, hostname=None, slicename=None, email=None, interface=None, **kwargs):
  30         #def hostname_to_hrn(auth_hrn, login_base, hostname):
  31         if hostname is not None:
  32             self.type='node'
  33             # keep only the first part of the DNS name
  34             #self.hrn='.'.join( [auth,hostname.split(".")[0] ] )
  35             # escape the '.' in the hostname
  36             self.hrn='.'.join( [auth,Xrn.escape(hostname)] )
  37             self.hrn_to_urn()
  38         #def slicename_to_hrn(auth_hrn, slicename):
  39         elif slicename is not None:
  40             self.type='slice'
  41             # split at the first _
  42             parts = slicename.split("_",1)
  43             self.hrn = ".".join([auth] + parts )
  44             self.hrn_to_urn()
  45         #def email_to_hrn(auth_hrn, email):
  46         elif email is not None:
  47             self.type='person'
  48             # keep only the part before '@' and replace special chars into _
  49             self.hrn='.'.join([auth,email.split('@')[0].replace(".", "_").replace("+", "_")])
  50             self.hrn_to_urn()
  51         elif interface is not None:
  52             self.type = 'interface'
  53             self.hrn = auth + '.' + interface
  54             self.hrn_to_urn()
  55         else:
  56             Xrn.__init__ (self,**kwargs)
  57
  58     #def hrn_to_pl_slicename(hrn):
  59     def pl_slicename (self):
  60         self._normalize()
  61         leaf = self.leaf
  62         leaf = re.sub('[^a-zA-Z0-9_]', '', leaf)
  63         return self.pl_login_base() + '_' + leaf
  64
  65     #def hrn_to_pl_authname(hrn):
  66     def pl_authname (self):
  67         self._normalize()
  68         return self.authority[-1]
  69
  70     def interface_name(self):
  71         self._normalize()
  72         return self.leaf
  73
  74     #def hrn_to_pl_login_base(hrn):
  75     def pl_login_base (self):
  76         self._normalize()
  77         base = self.authority[-1]
  78
  79         # Fix up names of GENI Federates
  80         base = base.lower()
  81         base = re.sub('\\\[^a-zA-Z0-9]', '', base)
  82
  83         if len(base) > 20:
  84             base = base[len(base)-20:]
  85
  86         return base