Set up long polling Publisher

This document describes how to set up a publisher using the long polling technique.

Configure `WAGTAIL_LIVE_PUBLISHER`

In order to use the long polling technique for the publishing part, add this to your settings:

WAGTAIL_LIVE_PUBLISHER = "wagtail_live.publishers.polling.LongPollingPublisher"

You can optionally set a polling timeout:

WAGTAIL_LIVE_POLLING_TIMEOUT = value # in seconds

The default value is 60(s).

We also need to add this to our live_blog_page.html template:

{% include "wagtail_live/polling/long_polling.html" %}

Make sure you have these 2 lines in your template:

{% include "wagtail_live/live_posts.html" %}

{% include "wagtail_live/polling/long_polling.html" %}

Add the Wagtail Live URLs to your urls.py:

from django.urls import include, path
from wagtail_live import urls as live_urls

urlpatterns += [
    path('wagtail_live/', include(live_urls)),
]