from django.template import loader, RequestContext

from django.http import HttpResponse, HttpResponsePermanentRedirect, HttpResponseGone

def direct_to_template(request, template, extra_context=None, mimetype=None, **kwargs):

    """

    Render a given template with any extra URL parameters in the context as

    ``{{ params }}``.

    """

    if extra_context is None: extra_context = {}

    dictionary = {'params': kwargs}

    for key, value in extra_context.items():

        if callable(value):

            dictionary[key] = value()

        else:

            dictionary[key] = value

    c = RequestContext(request, dictionary)

    t = loader.get_template(template)

    return HttpResponse(t.render(c), mimetype=mimetype)

def redirect_to(request, url, **kwargs):

    """

    Redirect to a given URL.

    The given url may contain dict-style string formatting, which will be

    interpolated against the params in the URL.  For example, to redirect from

    ``/foo/<id>/`` to ``/bar/<id>/``, you could use the following URLconf::

        urlpatterns = patterns('',

            ('^foo/(?P<id>\d+)/$', 'django.views.generic.simple.redirect_to', {'url' : '/bar/%(id)s/'}),

        )

    If the given url is ``None``, a HttpResponseGone (410) will be issued.

    """

    if url is not None:

        return HttpResponsePermanentRedirect(url % kwargs)

    else:

        return HttpResponseGone()