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from django.http import HttpResponse, Http404
from django.template import loader
from django.contrib.gis.db.backend import SpatialBackend
from django.contrib.sites.models import Site
from django.core import urlresolvers
from django.core.paginator import EmptyPage, PageNotAnInteger
from django.db.models import get_model
from django.utils.encoding import smart_str
from django.contrib.gis.shortcuts import render_to_kml, render_to_kmz
class KMLNotFound(Exception):
pass
def index(request, sitemaps):
"""
This view generates a sitemap index that uses the proper view
for resolving geographic section sitemap URLs.
"""
current_site = Site.objects.get_current()
sites = []
protocol = request.is_secure() and 'https' or 'http'
for section, site in sitemaps.items():
if callable(site):
pages = site().paginator.num_pages
else:
pages = site.paginator.num_pages
sitemap_url = urlresolvers.reverse('django.contrib.gis.sitemaps.views.sitemap', kwargs={'section': section})
sites.append('%s://%s%s' % (protocol, current_site.domain, sitemap_url))
if pages > 1:
for page in range(2, pages+1):
sites.append('%s://%s%s?p=%s' % (protocol, current_site.domain, sitemap_url, page))
xml = loader.render_to_string('sitemap_index.xml', {'sitemaps': sites})
return HttpResponse(xml, mimetype='application/xml')
def sitemap(request, sitemaps, section=None):
"""
This view generates a sitemap with additional geographic
elements defined by Google.
"""
maps, urls = [], []
if section is not None:
if section not in sitemaps:
raise Http404("No sitemap available for section: %r" % section)
maps.append(sitemaps[section])
else:
maps = sitemaps.values()
page = request.GET.get("p", 1)
for site in maps:
try:
if callable(site):
urls.extend(site().get_urls(page))
else:
urls.extend(site.get_urls(page))
except EmptyPage:
raise Http404("Page %s empty" % page)
except PageNotAnInteger:
raise Http404("No page '%s'" % page)
xml = smart_str(loader.render_to_string('gis/sitemaps/geo_sitemap.xml', {'urlset': urls}))
return HttpResponse(xml, mimetype='application/xml')
def kml(request, label, model, field_name=None, compress=False):
"""
This view generates KML for the given app label, model, and field name.
The model's default manager must be GeoManager, and the field name
must be that of a geographic field.
"""
placemarks = []
klass = get_model(label, model)
if not klass:
raise KMLNotFound("You must supply a valid app.model label. Got %s.%s" % (label, model))
if SpatialBackend.postgis:
# PostGIS will take care of transformation.
placemarks = klass._default_manager.kml(field_name=field_name)
else:
# There's no KML method on Oracle or MySQL, so we use the `kml`
# attribute of the lazy geometry instead.
placemarks = []
if SpatialBackend.oracle:
qs = klass._default_manager.transform(4326, field_name=field_name)
else:
qs = klass._default_manager.all()
for mod in qs:
setattr(mod, 'kml', getattr(mod, field_name).kml)
placemarks.append(mod)
# Getting the render function and rendering to the correct.
if compress:
render = render_to_kmz
else:
render = render_to_kml
return render('gis/kml/placemarks.kml', {'places' : placemarks})
def kmz(request, label, model, field_name=None):
"""
This view returns KMZ for the given app label, model, and field name.
"""
return kml(request, label, model, field_name, True)
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