# Twisted, the Framework of Your Internet
# Copyright (C) 2003 Matthew W. Lefkowitz
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of version 2.1 of the GNU Lesser General
# Public License as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
#
# Author: Clark Evans (cce@clarkevans.com)
""" flow.web
This contains wrappers to apply flow to components in twisted.web.*
"""
from controller import Deferred
from twisted.web import resource, server
from twisted.python.failure import Failure
class Resource(resource.Resource):
""" a resource which uses flow in its page generation
from __future__ import generators
from twisted.flow import flow
def render(req):
req.write("Delayed")
req.write("Delayed WebPage
")
yield flow.Cooperate(5)
req.write("Delayed Content
")
if __name__=='__main__':
from twisted.internet import reactor
from twisted.web.server import Site
from twisted.flow.web import Resource
print "visit http://localhost:8081/ to view"
reactor.listenTCP(8081,Site(Resource(render)))
reactor.run()
"""
def __init__(self, gen):
resource.Resource.__init__(self)
self.gen = gen
def isLeaf(self): return true
def render(self, req):
self.d = Deferred(self.gen(req))
self.d.addErrback(lambda fail: fail.printTraceback())
self.d.addBoth(lambda ret: req.finish() or ret)
return server.NOT_DONE_YET