# Copyright (c) 2001-2004 Twisted Matrix Laboratories. # See LICENSE for details. # You can run this .tac file directly with: # twistd -ny demo_draw.tac """A trivial drawing application. Clients are allowed to connect and spew various characters out over the terminal. Spacebar changes the drawing character, while the arrow keys move the cursor. """ from twisted.conch.insults import insults from twisted.conch.telnet import TelnetTransport, TelnetBootstrapProtocol from twisted.conch.manhole_ssh import ConchFactory, TerminalRealm from twisted.internet import protocol from twisted.application import internet, service from twisted.cred import checkers, portal class Draw(insults.TerminalProtocol): """Protocol which accepts arrow key and spacebar input and places the requested characters onto the terminal. """ cursors = list('!@#$%^&*()_+-=') def connectionMade(self): self.terminal.eraseDisplay() self.terminal.resetModes([insults.IRM]) self.cursor = self.cursors[0] def keystrokeReceived(self, keyID, modifier): if keyID == self.terminal.UP_ARROW: self.terminal.cursorUp() elif keyID == self.terminal.DOWN_ARROW: self.terminal.cursorDown() elif keyID == self.terminal.LEFT_ARROW: self.terminal.cursorBackward() elif keyID == self.terminal.RIGHT_ARROW: self.terminal.cursorForward() elif keyID == ' ': self.cursor = self.cursors[(self.cursors.index(self.cursor) + 1) % len(self.cursors)] else: return self.terminal.write(self.cursor) self.terminal.cursorBackward() def makeService(args): checker = checkers.InMemoryUsernamePasswordDatabaseDontUse(username="password") f = protocol.ServerFactory() f.protocol = lambda: TelnetTransport(TelnetBootstrapProtocol, insults.ServerProtocol, args['protocolFactory'], *args.get('protocolArgs', ()), **args.get('protocolKwArgs', {})) tsvc = internet.TCPServer(args['telnet'], f) def chainProtocolFactory(): return insults.ServerProtocol( args['protocolFactory'], *args.get('protocolArgs', ()), **args.get('protocolKwArgs', {})) rlm = TerminalRealm() rlm.chainedProtocolFactory = chainProtocolFactory ptl = portal.Portal(rlm, [checker]) f = ConchFactory(ptl) csvc = internet.TCPServer(args['ssh'], f) m = service.MultiService() tsvc.setServiceParent(m) csvc.setServiceParent(m) return m application = service.Application("Insults Demo App") makeService({'protocolFactory': Draw, 'telnet': 6023, 'ssh': 6022}).setServiceParent(application)