add javascript ping to keep session alive

Author: lociii

MANIFEST.in

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+include README.md
+recursive-include django-session-idle-timeout/templates *

django-session-idle-timeout/templates/session_keep_alive.html

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+{% load url from future %}
+<script type="text/javascript">
+    function session_keep_alive() {
+        http_request = new XMLHttpRequest();
+        http_request.open('GET', "{% url 'django-session-idle-timeout_ping' %}");
+        http_request.send(null);
+    }
+
+    // ping every five minutes
+    setInterval(session_keep_alive, {{ interval }});
+</script>

django-session-idle-timeout/templatetags/__init__.py

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+# -*- coding: UTF-8 -*-

django-session-idle-timeout/templatetags/session_keep_alive.py

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+# -*- coding: UTF-8 -*-
+from django import template
+from django.conf import settings
+
+register = template.Library()
+
+def session_keep_alive(context):
+    return context.update({
+        'interval': int(getattr(settings, 'SESSION_IDLE_TIMEOUT', 1800)) / 2 * 1000,
+    })
+register.inclusion_tag('session_keep_alive.html', takes_context=True)(session_keep_alive)

django-session-idle-timeout/urls.py

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+# -*- coding: UTF-8 -*-
+
+from django.conf.urls import patterns, url
+import views
+
+urlpatterns = patterns('',
+    url(r"^/?", views.PingView.as_view(), name="django-session-idle-timeout_ping"),
+)

django-session-idle-timeout/views.py

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+# -*- coding: UTF-8 -*-
+from django.views.generic import View
+from django.http import HttpResponse
+
+class PingView(View):
+    def get(self, request):
+        return HttpResponse('pong')