[1.7.x] Fixed #23403 -- Fixed crash in contrib.sitemaps if lastmod returned a date rather than datetime.

Thanks igorcc for the report and Preston Timmons for review.

Backport of 66580fe97c from master

django/contrib/sitemaps/tests/test_http.py

@@ -82,6 +82,21 @@ class HTTPSitemapTests(SitemapTestsBase):
         response = self.client.get('/lastmod/sitemap.xml')
         self.assertEqual(response['Last-Modified'], 'Wed, 13 Mar 2013 10:00:00 GMT')
 
+    def test_sitemap_last_modified_date(self):
+        """
+        The Last-Modified header should be support dates (without time).
+        """
+        response = self.client.get('/lastmod/date-sitemap.xml')
+        self.assertEqual(response['Last-Modified'], 'Wed, 13 Mar 2013 00:00:00 GMT')
+
+    def test_sitemap_last_modified_tz(self):
+        """
+        The Last-Modified header should be converted from timezone aware dates
+        to GMT.
+        """
+        response = self.client.get('/lastmod/tz-sitemap.xml')
+        self.assertEqual(response['Last-Modified'], 'Wed, 13 Mar 2013 15:00:00 GMT')
+
     def test_sitemap_last_modified_missing(self):
         "Tests that Last-Modified header is missing when sitemap has no lastmod"
         response = self.client.get('/generic/sitemap.xml')

django/contrib/sitemaps/tests/urls/http.py

@@ -1,6 +1,7 @@
-from datetime import datetime
+from datetime import date, datetime
 from django.conf.urls import patterns, url
 from django.contrib.sitemaps import Sitemap, GenericSitemap, FlatPageSitemap, views
+from django.utils import timezone
 from django.views.decorators.cache import cache_page
 
 from django.contrib.sitemaps.tests.base import TestModel
@@ -42,6 +43,14 @@ class FixedLastmodMixedSitemap(Sitemap):
         return [o1, o2]
 
 
+class DateSiteMap(SimpleSitemap):
+    lastmod = date(2013, 3, 13)
+
+
+class TimezoneSiteMap(SimpleSitemap):
+    lastmod = datetime(2013, 3, 13, 10, 0, 0, tzinfo=timezone.get_fixed_timezone(-300))
+
+
 simple_sitemaps = {
     'simple': SimpleSitemap,
 }
@@ -78,6 +87,10 @@ urlpatterns = patterns('django.contrib.sitemaps.views',
     (r'^empty/sitemap\.xml$', 'sitemap', {'sitemaps': empty_sitemaps}),
     (r'^lastmod/sitemap\.xml$', 'sitemap', {'sitemaps': fixed_lastmod_sitemaps}),
     (r'^lastmod-mixed/sitemap\.xml$', 'sitemap', {'sitemaps': fixed_lastmod__mixed_sitemaps}),
+    url(r'^lastmod/date-sitemap.xml$', views.sitemap,
+        {'sitemaps': {'date-sitemap': DateSiteMap}}),
+    url(r'^lastmod/tz-sitemap.xml$', views.sitemap,
+        {'sitemaps': {'tz-sitemap': TimezoneSiteMap}}),
     (r'^generic/sitemap\.xml$', 'sitemap', {'sitemaps': generic_sitemaps}),
     (r'^flatpages/sitemap\.xml$', 'sitemap', {'sitemaps': flatpage_sitemaps}),
     url(r'^cached/index\.xml$', cache_page(1)(views.index),

django/contrib/sitemaps/views.py

@@ -1,4 +1,5 @@
 from calendar import timegm
+import datetime
 from functools import wraps
 
 from django.contrib.sites.shortcuts import get_current_site
@@ -74,6 +75,11 @@ def sitemap(request, sitemaps, section=None,
     if hasattr(site, 'latest_lastmod'):
         # if latest_lastmod is defined for site, set header so as
         # ConditionalGetMiddleware is able to send 304 NOT MODIFIED
+        lastmod = site.latest_lastmod
         response['Last-Modified'] = http_date(
-            timegm(site.latest_lastmod.utctimetuple()))
+            timegm(
+                lastmod.utctimetuple() if isinstance(lastmod, datetime.datetime)
+                else lastmod.timetuple()
+            )
+        )
     return response

docs/releases/1.7.1.txt

@@ -40,3 +40,6 @@ Bugfixes
 
 * Empty ``index_together`` or ``unique_together`` model options no longer
   results in infinite migrations (:ticket:`23452`).
+
+* Fixed crash in ``contrib.sitemaps`` if ``lastmod`` returned a ``date`` rather
+  than a ``datetime`` (:ticket:`23403`).