Question

Im new to Twisted. Why is it printing “render()” twice? I know if I return server.NOT_DONE_YET, it will only print once, but I wish to return string/JSON instead. Any help?

Code:

from twisted.web import resource, server
from twisted.internet import reactor
import simplejson

class WResource(resource.Resource):
    isLeaf=True

    def __init__(self):
        print "resource started"

    def render(self, request):
        print "render()"
        request.setHeader('Content-Type', 'application/json')
        return simplejson.dumps(dict(through_port=8080, subdomain='hello'))

reactor.listenTCP(9000, server.Site(WResource()))
reactor.run()

Output:

> python server.py
resource started
render()
render()

Answer 1

Because your web browser is requesting favicon.ico. If you print request.postpath in your render method, you’ll see that only one of the requests is hitting the page that you expect.