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