url_resource_dispatch.py

# use this: http://codysoyland.com/2009/sep/6/introduction-surlex/ for URL->Regex mapping
# interesting: http://github.com/simonw/djangode

import copy
from twisted.web.server import Site
from twisted.web.resource import Resource
from twisted.internet import reactor


class ViewResource(Resource):
    """Associate a 'view' function with a
    twisted.web.resource.Resource instance.
    """

    def __init__(self, view):
        Resource.__init__(self)
        self.view = view or self._fourOfour

    def _fourOfour(self, request):
        return "404 Not Found"

    def render(self, request):
        return self.view(request)


class UrlDispatchSite(Site):

    def __init__(self, urlpatterns, **kwargs):
        Site.__init__(self, kwargs.get("resource"), logPath=kwargs.get("logPath"), timeout=kwargs.get("timeout", 60*60*12))
        self.urlpatterns = urlpatterns

    def _view_for_uri(self, uri):
        view = None
        for (path, viewforpath) in self.urlpatterns:
            if uri == path: #TODO replace with intelligent regex matching.
                view = viewforpath
                break #keep the first match
        return view

    def getResourceFor(self, request):
        """Get a resource for a request.
        """
        request.site = self
        request.sitepath = copy.copy(request.prepath)
        view = self._view_for_uri(request.uri)
        return ViewResource(view)


#
# example 'views'
#
def data(request):
    if request.method == "POST":
        print "data - POST"
    print "data - request => ", request
    return "data"


def info(request):
    if request.method == "POST":
        print "info - POST"
    print "info - request => ", request
    return "info"

urlpatterns = (
    ("/data/foo", data),
    ("/info", info),
)


factory = UrlDispatchSite(urlpatterns)
reactor.listenTCP(8880, factory)
reactor.run()