Function unloadhook

web/application.py:683–723

Converts an unload hook into an application processor. >>> app = auto_application() >>> def f(): "something done after handling request" ... >>> app.add_processor(unloadhook(f))

(h)

def unloadhook(h):
    """
    Converts an unload hook into an application processor.

        >>> app = auto_application()
        >>> def f(): "something done after handling request"
        ...
        >>> app.add_processor(unloadhook(f))
    """

    def processor(handler):
        try:
            result = handler()
        except:
            # run the hook even when handler raises some exception
            h()
            raise

        if result and hasattr(result, "__next__"):
            return wrap(result)
        else:
            h()
            return result

    def wrap(result):
        def next_hook():
            try:
                return next(result)
            except:
                # call the hook at the and of iterator
                h()
                raise

        result = iter(result)
        while True:
            try:
                yield next_hook()
            except StopIteration:
                return

    return processor


def autodelegate(prefix=""):