from urllib.parse import urlencode
from urllib.request import urlopen
from django.apps import apps as django_apps
from django.conf import settings
from django.core import paginator
from django.core.exceptions import ImproperlyConfigured
from django.urls import NoReverseMatch, reverse
from django.utils import translation
PING_URL = "https://www.google.com/webmasters/tools/ping"
class SitemapNotFound(Exception):
pass
[docs]def ping_google(sitemap_url=None, ping_url=PING_URL):
"""
Alert Google that the sitemap for the current site has been updated.
If sitemap_url is provided, it should be an absolute path to the sitemap
for this site -- e.g., '/sitemap.xml'. If sitemap_url is not provided, this
function will attempt to deduce it by using urls.reverse().
"""
sitemap_full_url = _get_sitemap_full_url(sitemap_url)
params = urlencode({'sitemap': sitemap_full_url})
urlopen('%s?%s' % (ping_url, params))
def _get_sitemap_full_url(sitemap_url):
if not django_apps.is_installed('django.contrib.sites'):
raise ImproperlyConfigured("ping_google requires django.contrib.sites, which isn't installed.")
if sitemap_url is None:
try:
# First, try to get the "index" sitemap URL.
sitemap_url = reverse('django.contrib.sitemaps.views.index')
except NoReverseMatch:
try:
# Next, try for the "global" sitemap URL.
sitemap_url = reverse('django.contrib.sitemaps.views.sitemap')
except NoReverseMatch:
pass
if sitemap_url is None:
raise SitemapNotFound("You didn't provide a sitemap_url, and the sitemap URL couldn't be auto-detected.")
Site = django_apps.get_model('sites.Site')
current_site = Site.objects.get_current()
return 'http://%s%s' % (current_site.domain, sitemap_url)
[docs]class Sitemap:
# This limit is defined by Google. See the index documentation at
# https://www.sitemaps.org/protocol.html#index.
limit = 50000
# If protocol is None, the URLs in the sitemap will use the protocol
# with which the sitemap was requested.
protocol = None
def __get(self, name, obj, default=None):
try:
attr = getattr(self, name)
except AttributeError:
return default
if callable(attr):
return attr(obj)
return attr
@property
def paginator(self):
return paginator.Paginator(self.items(), self.limit)
def get_urls(self, page=1, site=None, protocol=None):
# Determine protocol
if self.protocol is not None:
protocol = self.protocol
if protocol is None:
protocol = 'http'
# Determine domain
if site is None:
if django_apps.is_installed('django.contrib.sites'):
Site = django_apps.get_model('sites.Site')
try:
site = Site.objects.get_current()
except Site.DoesNotExist:
pass
if site is None:
raise ImproperlyConfigured(
"To use sitemaps, either enable the sites framework or pass "
"a Site/RequestSite object in your view."
)
domain = site.domain
if getattr(self, 'i18n', False):
urls = []
current_lang_code = translation.get_language()
for lang_code, lang_name in settings.LANGUAGES:
translation.activate(lang_code)
urls += self._urls(page, protocol, domain)
translation.activate(current_lang_code)
else:
urls = self._urls(page, protocol, domain)
return urls
def _urls(self, page, protocol, domain):
urls = []
latest_lastmod = None
all_items_lastmod = True # track if all items have a lastmod
for item in self.paginator.page(page).object_list:
loc = "%s://%s%s" % (protocol, domain, self.__get('location', item))
priority = self.__get('priority', item)
lastmod = self.__get('lastmod', item)
if all_items_lastmod:
all_items_lastmod = lastmod is not None
if (all_items_lastmod and
(latest_lastmod is None or lastmod > latest_lastmod)):
latest_lastmod = lastmod
url_info = {
'item': item,
'location': loc,
'lastmod': lastmod,
'changefreq': self.__get('changefreq', item),
'priority': str(priority if priority is not None else ''),
}
urls.append(url_info)
if all_items_lastmod and latest_lastmod:
self.latest_lastmod = latest_lastmod
return urls
[docs]class GenericSitemap(Sitemap):
priority = None
changefreq = None
def __init__(self, info_dict, priority=None, changefreq=None, protocol=None):
self.queryset = info_dict['queryset']
self.date_field = info_dict.get('date_field')
self.priority = priority
self.changefreq = changefreq
self.protocol = protocol
def items(self):
# Make sure to return a clone; we don't want premature evaluation.
return self.queryset.filter()
def lastmod(self, item):
if self.date_field is not None:
return getattr(item, self.date_field)
return None
default_app_config = 'django.contrib.sitemaps.apps.SiteMapsConfig'
Oct 31, 2018