1 from twisted.internet import protocol, reactor, defer, endpoints
 2 from twisted.protocols import basic
 3 
 4 class FingerProtocol(basic.LineReceiver):
 5     def lineReceived(self, user):
 6         d = self.factory.getUser(user)
 7 
 8         def onError(err):
 9             return 'Internal error in server'
10         d.addErrback(onError)
11 
12         def writeResponse(message):
13             self.transport.write(message + b'\r\n')
14             self.transport.loseConnection()
15         d.addCallback(writeResponse)
16 
17 class FingerFactory(protocol.ServerFactory):
18     protocol = FingerProtocol
19 
20     def __init__(self, users):
21         self.users = users
22 
23     def getUser(self, user):
24         return defer.succeed(self.users.get(user, b"No such user"))
25 
26 fingerEndpoint = endpoints.serverFromString(reactor, "tcp:1079")
27 fingerEndpoint.listen(FingerFactory({b'moshez': b'Happy and well'}))
28 reactor.run()

 1 from twisted.application import service, strports
 2 from twisted.internet import protocol, reactor, defer
 3 from twisted.protocols import basic
 4 
 5 class FingerProtocol(basic.LineReceiver):
 6     def lineReceived(self, user):
 7         d = self.factory.getUser(user)
 8 
 9         def onError(err):
10             return 'Internal error in server'
11         d.addErrback(onError)
12 
13         def writeResponse(message):
14             self.transport.write(message + b'\r\n')
15             self.transport.loseConnection()
16         d.addCallback(writeResponse)
17 
18 class FingerFactory(protocol.ServerFactory):
19     protocol = FingerProtocol
20 
21     def __init__(self, users):
22         self.users = users
23 
24     def getUser(self, user):
25         return defer.succeed(self.users.get(user, b"No such user"))
26 
27 application = service.Application('finger', uid=1, gid=1)
28 factory = FingerFactory({b'moshez': b'Happy and well'})
29 strports.service("tcp:79", factory, reactor=reactor).setServiceParent(
30     service.IServiceCollection(application))