How to use Twisted on Mac OSX?

Question

I’m following a tutorial to use Twisted to establish connection to an app. However, when testing the connection to localhost for testing, it seems that it is not responding.

I am using the following script in chatserver.py file :

from twisted.internet.protocol import Factory, Protocol
from twisted.internet import reactor

class IphoneChat(Protocol):
    def connectionMade(self):
        print " um cliente conectado"

factory = Factory()
factory.protoco = IphoneChat
reactor.listenTCP(80, factory)
print "Iphone Chat server started"
reactor.run()

Then I open another console window to test with the following command:

telnet localhost 80

And the following error returns to me:

Trying ::1... telnet: connect to address ::1: Connection refused Trying 127.0.0.1... telnet: connect to address 127.0.0.1: Connection refused telnet: Unable to connect to remote host

How I can make Twisted work on Mac OSX?

Answer 1

My first suggestion is whenever you choose another door, like 8000. In OSX usually only processes executed with root can open doors below 1024. This can be changed but I do not recommend.

If you really need to use the door 80, OSX comes with a utility called ipfw which allows redirecting the port 80 to the 8000:

sudo ipfw add 100 fwd 127.0.0.1,8000 tcp from any to me 80

Now you can change your program to the door 8000 and still access it at the door 80.