old_contents: '''
     Copyright 2012 Will Rogers
  
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
  
         http://www.apache.org/licenses/LICENSE-2.0
  
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
  '''
  
  import logging
  
  log = logging.getLogger(__name__)
  
  def parse_fqan(fqan):
      '''
      We can get three pieces of information from a FQAN: role, group and VO.
      We return this as a 3-tuple.
      If it's not of the expected format, we put the whole string in the VO
      and leave the other two as None.
      '''
      # Take only the first FQAN
      fqan = fqan.split(';')[0]
      # Check for the expected format, accepting any case for 'role'
      fqan_check = fqan.lower()
      if (fqan_check.find('/') != 0) or (fqan_check.find('role=') == -1) \
              or (fqan_check.find('role=') == 1):
          # if not, just return FQAN as VO
          return (None, None, fqan)
             
      pieces = fqan.split('/')
      
      try:
          # pieces[0] is empty if the string begins with /
          vo = pieces[1]
          # group is everything before 'role='
          group = ""
          for piece in pieces:
              if len(piece) == 0:
                  continue
              if piece.lower().startswith('role='):
                  role = piece
                  break
              else:
                  group += '/' + piece
         
          return (role, group, vo)       
      
      except Exception:
          log.warn("FQAN in non-standard format: " + fqan)
          return (None, None, fqan)
new_contents: '''
     Copyright 2012 Will Rogers
  
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
  
         http://www.apache.org/licenses/LICENSE-2.0
  
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
  '''
  
  import logging
  
  log = logging.getLogger(__name__)
  
  def parse_fqan(fqan):
      '''
      We can get three pieces of information from a FQAN: role, group and VO.
      We return this as a 3-tuple.
      If it's not of the expected format, we put the whole string in the VO
      and leave the other two as None.
      '''
      # Take only the first FQAN
      fqan = fqan.split(';')[0]
      # Check for the expected format, accepting any case for 'role'
      if fqan.find('/') != 0:
          # if not, just return FQAN as VO
          return (None, None, fqan)
             
      pieces = fqan.split('/')
  
      # Set default value for role (but not 'Role=NULL' as we don't want to assert
      # missing information).
      role = 'None'
  
      try:
          # pieces[0] is empty if the string begins with /
          vo = pieces[1]
          # group is everything before 'role='
          group = ""
          for piece in pieces:
              if len(piece) == 0:
                  continue
              if piece.lower().startswith('role='):
                  role = piece
                  break
              else:
                  group += '/' + piece
         
          return (role, group, vo)       
      
      except Exception:
          log.warn("FQAN in non-standard format: " + fqan)
          return (None, None, fqan)
subject: Change FQAN parser to default role to 'None'