[Twisted-Python] Using service.Application

Mon Dec 15 05:14:44 EST 2003

I had the following demo script for Twisted 1.0.6:

#-----------------
import sys
from twisted.internet import app, reactor
from twisted.python import log, logfile
from twisted.web import server, resource

class Simple(resource.Resource):
    isLeaf = True

    def render(self, request):
        print "Request:", request
        return "<html>Hello</html>"

if __name__ == '__main__':

    f = sys.stdout
    log.startLogging(f)

    site = server.Site(Simple())
    application = app.Application('web')
    application.bindPorts()
    application.listenTCP(8080, site)
    application.run(save=0)
#-----------------

This works OK with the following client:

#-----------------
from twisted.internet import reactor
from twisted.web.client import getPage
from twisted.python.util import println

class Client:

    def __init__(self):
        self.sendReq()
        reactor.run()

    def handleCallback(self, value):
        println("Success:", value)
        reactor.stop()

    def handleErrback(self, error):
        println("Error:", error)
        reactor.stop()

    def sendReq(self):
        uri = "http://localhost:8080/Simple"
        deferred = getPage(uri)
        deferred.addCallbacks(self.handleCallback,
                              self.handleErrback)

if __name__ == "__main__":

    Client()
#-----------------

However, under Twisted 1.1.1 this raises: 
exceptions.DeprecationWarning: twisted.internet.app is deprecated, 
use twisted.application instead.

So I tried to create a new version of the server:

#-----------------
import sys
from twisted.application import service, internet
from twisted.internet import reactor
from twisted.python import log
from twisted.web import server, resource

class Simple(resource.Resource):
    isLeaf = True

    def render(self, request):
        print "Request:", request
        return "<html>Hello</html>"

if __name__ == '__main__':

    f = sys.stdout
    log.startLogging(f)

    root = Simple()
    site = server.Site(root)
    application = service.Application('web')
    sc = service.IServiceCollection(application)
    i = internet.TCPServer(8080, site)
    i.setServiceParent(sc)
    reactor.run()
#-----------------

But now my client gives this:

Error: [Failure instance: Traceback: 
twisted.internet.error.ConnectionRefusedError, 
Connection was refused by other side: 22: Invalid argument.
]

I am running Python 2.3.2 on HP-UX 11i.

Can anybody advise what is happening here?

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