Network Programming in Python

[Jean-Paul Calderone]

On 22 Jun 2006 12:02:14 -0700, diffuser78 at gmail.com wrote:
>I am a newbie in python. I want to learn and implement a small
>networking concept. Please help me. Every help is appreciated.
>
>I have one Linux Box and one Windows PC. I want to have a daemon
>running on Windows PC which listens on some specicif port number. I
>want to send a TCP/IP or UDP/IP packet from Linux box to Windows PC to
>start some application. As Windows PC recieves such a packet from Linux
>Box it executes a certain .exe file. I want to implement this concept.
>
>In short I want to remotely send command from Linux to Windows PC to
>start a particular application.
>
>Thanks, Every help is appreciated.
>

Untested:

    from twisted.internet import protocol, reactor
    from twisted.protocols import basic

    COMMANDS = {
        "xterm": ("/usr/bin/xterm", {"DISPLAY": ":1.0"}),
        }

    class CommandLauncher(basic.LineReceiver):
        def lineReceived(self, line):
            try:
                cmd, env = COMMANDS[line]
            except KeyError:
                self.sendLine("error")
            else:
                reactor.spawnProcess(None, cmd, env=env)
                self.sendLine("okay")

    f = protocol.ServerFactory()
    f.protocol = CommandLauncher
    reactor.listenTCP(12345, f)
    reactor.run()

You should be able to telnet to this (port 12345) and type in
names of commands for it to run.  Of course, xterm isn't a very
good win32 program to run but I couldn't think of a better example.
You could also write a program to send command requests to this
server, instead of using telnet.

Jean-Paul