sfa/planetlab/plxrn.py

   1 # specialized Xrn class for PlanetLab
   2 import re
   3 from sfa.util.xrn import Xrn, get_authority
   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 # helpers to handle external objects created via fedaration
  25 def top_auth (hrn):
  26     return hrn.split('.')[0]
  27
  28 def hash_loginbase(site_hrn):
  29     if len(site_hrn) <= 12:
  30         return site_hrn.replace('.','8').replace('_', '8')
  31     ratio = float(12) / len(site_hrn)
  32     auths_tab = site_hrn.split('.')
  33     auths_tab2 = []
  34     for auth in auths_tab:
  35
  36         auth = auth.replace('_', '8')
  37         auth2 = auth[:int(len(auth)*ratio)]
  38         auths_tab2.append(auth2)
  39     return '8'.join(auths_tab2)
  40
  41 class PlXrn (Xrn):
  42
  43     @staticmethod
  44     def site_hrn (auth, login_base):
  45         return '.'.join([auth,login_base])
  46
  47     def __init__ (self, auth=None, hostname=None, slicename=None, email=None, interface=None, **kwargs):
  48         #def hostname_to_hrn(auth_hrn, login_base, hostname):
  49         if hostname is not None:
  50             self.type='node'
  51             # keep only the first part of the DNS name
  52             #self.hrn='.'.join( [auth,hostname.split(".")[0] ] )
  53             # escape the '.' in the hostname
  54             self.hrn='.'.join( [auth,Xrn.escape(hostname)] )
  55             self.hrn_to_urn()
  56         #def slicename_to_hrn(auth_hrn, slicename):
  57         elif slicename is not None:
  58             self.type='slice'
  59             # split at the first _
  60             parts = slicename.split("_",1)
  61             self.hrn = ".".join([auth] + parts )
  62             self.hrn_to_urn()
  63         #def email_to_hrn(auth_hrn, email):
  64         elif email is not None:
  65             self.type='person'
  66             # keep only the part before '@' and replace special chars into _
  67             self.hrn='.'.join([auth,email.split('@')[0].replace(".", "_").replace("+", "_")])
  68             self.hrn_to_urn()
  69         elif interface is not None:
  70             self.type = 'interface'
  71             self.hrn = auth + '.' + interface
  72             self.hrn_to_urn()
  73         else:
  74             Xrn.__init__ (self,**kwargs)
  75
  76     #def hrn_to_pl_slicename(hrn):
  77     def pl_slicename (self):
  78         self._normalize()
  79         leaf = self.leaf
  80         sliver_id_parts = leaf.split(':')
  81         name = sliver_id_parts[0]
  82         name = re.sub('[^a-zA-Z0-9_]', '', name)
  83         return self.pl_login_base() + '_' + name
  84
  85     #def hrn_to_pl_authname(hrn):
  86     def pl_authname (self):
  87         self._normalize()
  88         return self.authority[-1]
  89
  90     def interface_name(self):
  91         self._normalize()
  92         return self.leaf
  93
  94     def pl_login_base (self):
  95         self._normalize()
  96         if self.type and self.type.startswith('authority'):
  97             base = self.leaf
  98         else:
  99             base = self.authority[-1]
 100
 101         # Fix up names of GENI Federates
 102         base = base.lower()
 103         base = re.sub('[\\\\]*[^a-zA-Z0-9]', '', base)
 104
 105         return base
 106
 107 tests = [
 108     'inria.foo.x',
 109     'in.foo.x_y',
 110     'inria.foo.longer',
 111     'onelab.upmc.fit_demo',
 112     'onelab.upmc.fit_demo.some_other',
 113 ]
 114
 115 if __name__ == '__main__':
 116     for test in tests:
 117         print("{} - hash_loginbase -> {}".format(test, hash_loginbase(test)))