def blog_feed(request, section=None):
    
    try:
        posts = Post.objects.section(section)
    except InvalidSection:
        raise Http404()
    
    if section is None:
        section = ALL_SECTION_NAME
    
    current_site = Site.objects.get_current()
    
    feed_title = "%s Blog: %s" % (current_site.name, section[0].upper() + section[1:])
    
    blog_url = "http://%s%s" % (current_site.domain, reverse("blog"))
    
    url_name, kwargs = "blog_feed", {"section": section}
    feed_url = "http://%s%s" % (current_site.domain, reverse(url_name, kwargs=kwargs))
    
    if posts:
        feed_updated = posts[0].published
    else:
        feed_updated = datetime(2009, 8, 1, 0, 0, 0)
    
    # create a feed hit
    hit = FeedHit()
    hit.request_data = serialize_request(request)
    hit.save()
    
    atom = render_to_string("biblion/atom_feed.xml", {
        "feed_id": feed_url,
        "feed_title": feed_title,
        "blog_url": blog_url,
        "feed_url": feed_url,
        "feed_updated": feed_updated,
        "entries": posts,
        "current_site": current_site,
    })
    return HttpResponse(atom, mimetype="application/atom+xml")
dataset/ETHPy150Open caseywstark/colab/colab/apps/biblion/views.py/blog_feed/original