new_contents: #!/usr/bin/env python
  import sys
  import pymongo
  
  import rflib.defs as defs
  import rflib.ipc.MongoIPC as MongoIPC
  from rflib.ipc.RFProtocolFactory import RFProtocolFactory
  
  def usage():
      print('Usage: %s <channel>\n' % sys.argv[0])
      print('channel: "rfclient" or "rfproxy"')
      sys.exit(1)
  
  def parse_args(args=sys.argv):
      if (len(sys.argv) < 2):
          return None
      if (args[1] == 'rfclient'):
          return defs.RFCLIENT_RFSERVER_CHANNEL
      if (args[1] == 'rfproxy'):
          return defs.RFSERVER_RFPROXY_CHANNEL
      return None
  
  if __name__ == '__main__':
      connection = pymongo.Connection('localhost', 27017)
      db = connection[defs.MONGO_DB_NAME]
      channel = parse_args()
  
      if (channel == None):
          usage()
  
      factory = RFProtocolFactory()
      for entry in db[channel].find():
          msg = MongoIPC.take_from_envelope(entry, factory)
          print(msg)
  
subject: Add "rfdb.py" diagnostic tool