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 # removed-dangerous - was used for non-slice objects
  17 #def hrn_to_pl_login_base (hrn):
  18 #    return PlXrn(xrn=hrn,type='slice').pl_login_base()
  19 def hrn_to_pl_authname (hrn):
  20     return PlXrn(xrn=hrn,type='any').pl_authname()
  21 def xrn_to_hostname(hrn):
  22     return Xrn.unescape(PlXrn(xrn=hrn, type='node').get_leaf())
  23
  24 class PlXrn (Xrn):
  25
  26     @staticmethod
  27     def site_hrn (auth, login_base):
  28         return '.'.join([auth,login_base])
  29
  30     def __init__ (self, auth=None, hostname=None, slicename=None, email=None, interface=None, **kwargs):
  31         #def hostname_to_hrn(auth_hrn, login_base, hostname):
  32         if hostname is not None:
  33             self.type='node'
  34             # keep only the first part of the DNS name
  35             #self.hrn='.'.join( [auth,hostname.split(".")[0] ] )
  36             # escape the '.' in the hostname
  37             self.hrn='.'.join( [auth,Xrn.escape(hostname)] )
  38             self.hrn_to_urn()
  39         #def slicename_to_hrn(auth_hrn, slicename):
  40         elif slicename is not None:
  41             self.type='slice'
  42             # split at the first _
  43             parts = slicename.split("_",1)
  44             self.hrn = ".".join([auth] + parts )
  45             self.hrn_to_urn()
  46         #def email_to_hrn(auth_hrn, email):
  47         elif email is not None:
  48             self.type='person'
  49             # keep only the part before '@' and replace special chars into _
  50             self.hrn='.'.join([auth,email.split('@')[0].replace(".", "_").replace("+", "_")])
  51             self.hrn_to_urn()
  52         elif interface is not None:
  53             self.type = 'interface'
  54             self.hrn = auth + '.' + interface
  55             self.hrn_to_urn()
  56         else:
  57             Xrn.__init__ (self,**kwargs)
  58
  59     #def hrn_to_pl_slicename(hrn):
  60     def pl_slicename (self):
  61         self._normalize()
  62         leaf = self.leaf
  63         sliver_id_parts = leaf.split(':')
  64         name = sliver_id_parts[0]
  65         name = re.sub('[^a-zA-Z0-9_]', '', name)
  66         return self.pl_login_base() + '_' + name
  67
  68     #def hrn_to_pl_authname(hrn):
  69     def pl_authname (self):
  70         self._normalize()
  71         return self.authority[-1]
  72
  73     def interface_name(self):
  74         self._normalize()
  75         return self.leaf
  76
  77     def pl_login_base (self):
  78         self._normalize()
  79         base = self.authority[-1]
  80
  81         # Fix up names of GENI Federates
  82         base = base.lower()
  83         base = re.sub('\\\[^a-zA-Z0-9]', '', base)
  84
  85         if len(base) > 20:
  86             base = base[len(base)-20:]
  87
  88         return base