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