sfa/methods/RenewSliver.py

   1 import datetime
   2
   3 from sfa.util.faults import InsufficientRights
   4 from sfa.util.xrn import urn_to_hrn
   5 from sfa.util.method import Method
   6 from sfa.util.sfatime import utcparse
   7
   8 from sfa.trust.credential import Credential
   9
  10 from sfa.storage.parameter import Parameter
  11
  12 class RenewSliver(Method):
  13     """
  14     Renews the resources in a sliver, extending the lifetime of the slice.
  15     @param slice_urn (string) URN of slice to renew
  16     @param credentials ([string]) of credentials
  17     @param expiration_time (string) requested time of expiration
  18
  19     """
  20     interfaces = ['aggregate', 'slicemgr']
  21     accepts = [
  22         Parameter(str, "Slice URN"),
  23         Parameter(type([str]), "List of credentials"),
  24         Parameter(str, "Expiration time in RFC 3339 format"),
  25         Parameter(dict, "Options"),
  26         ]
  27     returns = Parameter(bool, "Success or Failure")
  28
  29     def call(self, slice_xrn, creds, expiration_time, options={}):
  30
  31         (hrn, type) = urn_to_hrn(slice_xrn)
  32
  33         self.api.logger.info("interface: %s\ttarget-hrn: %s\tcaller-creds: %s\tmethod-name: %s"%(self.api.interface, hrn, creds, self.name))
  34
  35         # Find the valid credentials
  36         valid_creds = self.api.auth.checkCredentials(creds, 'renewsliver', hrn)
  37
  38         # Validate that the time does not go beyond the credential's expiration time
  39         requested_time = utcparse(expiration_time)
  40         max_renew_days = int(self.api.config.SFA_MAX_SLICE_RENEW)
  41         if requested_time > Credential(string=valid_creds[0]).get_expiration():
  42             raise InsufficientRights('Renewsliver: Credential expires before requested expiration time')
  43         if requested_time > datetime.datetime.utcnow() + datetime.timedelta(days=max_renew_days):
  44             raise Exception('Cannot renew > %s days from now' % max_renew_days)
  45         return self.api.manager.RenewSliver(self.api, slice_xrn, valid_creds, expiration_time, options)
  46