'.. http:put:: /channels/discovered/(string: channelid)/rssfeeds/http%3A%2F%2Ftest.com%2Frss.xml
Add a RSS feed to your channel. Returns error 409 if the supplied RSS feed already exists.
Note that the rss feed url should be URL-encoded.
**Example request**:
.. sourcecode:: none
curl -X PUT http://localhost:8085/channels/discovered/abcd/rssfeeds/http%3A%2F%2Ftest.com%2Frss.xml
**Example response**:
.. sourcecode:: javascript
"added": True
:statuscode 409: (conflict) if the specified RSS URL is already present in your feeds.'

def render_PUT(self, request):

    (channel_obj, error) = self.get_my_channel_obj_or_error(request)
    if (channel_obj is None):
        return error
    if (self.feed_url in channel_obj.get_rss_feed_url_list()):
        request.setResponseCode(http.CONFLICT)
        return json.dumps({'error': 'this    rss    feed    already    exists'})
    channel_obj.create_rss_feed(self.feed_url)
    return json.dumps({'added': True})
