Tag Archives: twisted

Slimmed down twisted compatible reloader script

Working on txweb again, I decided to give it a real flask/django style reloader script. Directly inspired by <a href=”
https://blog.elsdoerfer.name/2010/03/09/twisted-twistd-autoreload/ “>this</a> blog post I decided to cut down on the extraneous bits and also change what files it watched.

https://gist.github.com/devdave/05de2ed2fa2aa0a09ba931db36314e3e

TxWeb Alpha – A different spin on twisted.web

I’ve spent some more time on my current pet, txweb, and I think it’s pretty much at the as good as it gets stage.

Below is the source for the example.py


#App level
from txweb import Site, expose
#twisted
from twisted.web import server, resource
from twisted.internet import reactor
from twisted.web.static import File

from os.path import abspath, dirname, join

Mostly pretty standard imports for a twisted.web application.

Now here is the “Controllers”, they’re stripped down to bare-bones just to keep it simple

class PageOne(object):

    @expose
    def foo(self, request):
        return "Hello From PageOne Foo!"        
    
    @expose
    def delayed(self, request):
        def delayedResponse():
            request.write("I was delayed 🙁 ")
            request.finish()
            
        reactor.callLater(5, delayedResponse)
        return server.NOT_DONE_YET
    
    
class PageTwo(object):

    @expose
    def index(self, request):
        """ /pagetwo/index """
        return "Hello From PageTwo index!"
        

rootFile = lambda filename : abspath(join(dirname(__file__), filename))
        
class Root(object):
    
    @expose
    def index(self, request):
        """
            Will handle both / and /index paths
        """
        return "Hello From Index!"
    
    @expose
    def __default__(self, request):
        """
            Unless overriden further down, this will catch all 404's
        """
        return "I Caught %s " % request.path
    
    pageone = PageOne()
    pagetwo = PageTwo()
        
    readme  = File(rootFile("README.md"))
    license = File(rootFile("txweb/LICENSE.txt"))

Basically a txWeb enabled twisted service converts a URL path to an Object path.

So /hello/world could resolve to root.hello.world() if such a construct was provided.

Much more importantly, with the above example, /license resolves to the local file txweb/LICENSE and /readme resolves to README.md !

In summary txweb doesn’t throw away the epic amount of work the Twisted developers and volunteers have put forth, it just presents it in another way.