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pythontwisted

twisted.web.resource.Resource with twisted.web.template.Element example

I want to use twisted.web templates together twisted.web resources.

But I just don't get, how to make them work together.

I tried using, flatten(request, MyElement(), request.write), but it ends up throwing an exception: Request.write called on a request after Request.finish was called.

Could someone provide me a very basic example how to use the two classes together?

Solution

  • It sounds like you forgot to return NOT_DONE_YET from your render() method, and therefore finish() was called for you immediately. Something like the following should be somewhere in Twisted itself, to help with exactly this problem:

    from twisted.web.resource import Resource
from twisted.web.template import flatten
from twisted.web.server import NOT_DONE_YET

class ElementResource(Resource):
    def __init__(self, element):
        Resource.__init__(self)
        self.element = element
    def render_GET(self, request):
        d = flatten(request, self.element, request.write)
        def done(ignored):
            request.finish()
            return ignored
        d.addBoth(done)
        return NOT_DONE_YET