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Source Code for Module smartcard.pyro.server.RemoteReaderServer

  1  """RemoteReaderServer: monitor local readers and publish them as pyro 
  2  Remote Readers. 
  3   
  4  __author__ = "gemalto http://www.gemalto.com" 
  5   
  6  Copyright 2001-2011 gemalto 
  7  Author: Jean-Daniel Aussel, mailto:jean-daniel.aussel@gemalto.com 
  8   
  9  This file is part of pyscard. 
 10   
 11  pyscard is free software; you can redistribute it and/or modify 
 12  it under the terms of the GNU Lesser General Public License as published by 
 13  the Free Software Foundation; either version 2.1 of the License, or 
 14  (at your option) any later version. 
 15   
 16  pyscard is distributed in the hope that it will be useful, 
 17  but WITHOUT ANY WARRANTY; without even the implied warranty of 
 18  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 19  GNU Lesser General Public License for more details. 
 20   
 21  You should have received a copy of the GNU Lesser General Public License 
 22  along with pyscard; if not, write to the Free Software 
 23  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA 
 24  """ 
 25   
 26  try: 
 27      import Pyro.core 
 28      import Pyro.naming 
 29  except: 
 30      print 'You need pyro (python remote objects) at http://www.xs4all.nl/~irmen/pyro3/' 
 31      import sys 
 32      sys.exit() 
 33   
 34  import signal 
 35  import time 
 36   
 37  import smartcard.System 
 38  from smartcard.reader.Reader import Reader 
 39  from smartcard.ReaderMonitoring import ReaderMonitor, ReaderObserver 
 40  from smartcard.pyro.server.RemoteCardConnection import RemoteCardConnection 
 41  from smartcard.pyro.server import PyroDaemon 
 42  from smartcard.pyro.server import PyroNameServer 
 43   
 44   
 45 -class RemoteReader(Reader, Pyro.core.ObjBase): 
 46      """Remote reader class that embeds a local reader.""" 
 47   
 48 -    def __init__(self, reader): 
 49          """Encapsulate a local reader and publish as a pyro remote reader. 
 50   
 51          reader: the local reader to publish remotely 
 52          """ 
 53          Pyro.core.ObjBase.__init__(self) 
 54          self.readerobj = reader 
 55          self.name = reader.name 
 56   
 57 -    def addtoreadergroup(self, groupname): 
 58          """Add reader to a reader group.""" 
 59          self.readerobj.reader.addtoreadergroup(groupname) 
 60   
 61 -    def removefromreadergroup(self, groupname): 
 62          """Remove a reader from a reader group""" 
 63          self.readerobj.reader.removefromreadergroup(groupname) 
 64   
 65 -    def createConnection(self): 
 66          """Return a card connection thru the reader.""" 
 67          connection = RemoteCardConnection(self.readerobj.createConnection()) 
 68          daemon = PyroDaemon.PyroDaemon() 
 69          uri = daemon.connect(connection) 
 70          return uri 
 71   
 72   
 73 -class RemoteReaderServer(ReaderObserver): 
 74      """Monitor local readers, and publish them as remote pyro readers. 
 75      """ 
 76 -    def __init__(self): 
 77          """Starts pyro name server and constructs reader name space.""" 
 78          self.pn = PyroNameServer.PyroNameServer() 
 79          self.pn.start() 
 80          self.pn.waitStarted() 
 81   
 82          Pyro.core.initServer() 
 83          self.ns = Pyro.naming.NameServerLocator().getNS() 
 84          try: 
 85              self.ns.createGroup(':pyscard') 
 86              self.ns.createGroup(':pyscard.smartcard') 
 87              self.ns.createGroup(':pyscard.smartcard.readers') 
 88          except Pyro.errors.NamingError as error: 
 89              print error 
 90          self.daemon = PyroDaemon.PyroDaemon() 
 91          self.remotereaders = {} 
 92   
 93 -    def start(self): 
 94          """Start pyro daemon and accept incoming requests.""" 
 95          self.daemon.start() 
 96   
 97 -    def update(self, observable, (addedreaders, removedreaders)): 
 98          """Called when a local reader is added or removed. 
 99          Create remote pyro reader objects for added readers. 
100          Delete remote pyro reader objects for removed readers.""" 
101          for reader in addedreaders: 
102              remotereader = RemoteReader(reader) 
103              self.remotereaders[reader.name] = remotereader 
104              name = "".join(reader.name.split(' ')) 
105              name = ":pyscard.smartcard.readers." + "".join(name.split('.')) 
106              uri = self.daemon.connect(remotereader, name) 
107          for reader in removedreaders: 
108              remotereader = self.remotereaders[reader.name] 
109              self.daemon.disconnect(remotereader) 
110              del self.remotereaders[reader.name] 
111          self.pn.listall() 
112   
113   
114  if __name__ == '__main__': 
115      readerserver = RemoteReaderServer() 
116      readermonitor = ReaderMonitor() 
117      readermonitor.addObserver(readerserver) 
118      print 'Reader remote server up and running', 
119      print 'Please enter Ctrl+C to stop and exit...' 
120      readerserver.start() 
121   

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