doc/core/howto/tutorial/listings/finger/finger09.py

   1 # Read username, output from factory interfacing to OS, drop connections
   2
   3 from twisted.internet import protocol, reactor, defer, utils
   4 from twisted.protocols import basic
   5
   6 class FingerProtocol(basic.LineReceiver):
   7     def lineReceived(self, user):
   8         d = self.factory.getUser(user)
   9
  10         def onError(err):
  11             return 'Internal error in server'
  12         d.addErrback(onError)
  13
  14         def writeResponse(message):
  15             self.transport.write(message + '\r\n')
  16             self.transport.loseConnection()
  17         d.addCallback(writeResponse)
  18
  19 class FingerFactory(protocol.ServerFactory):
  20     protocol = FingerProtocol
  21
  22     def getUser(self, user):
  23         return utils.getProcessOutput("finger", [user])
  24
  25 reactor.listenTCP(1079, FingerFactory())
  26 reactor.run()