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from django.core.exceptions import Http404, ObjectDoesNotExist
from django.core.template import Context, loader
from django.models.core import sites, contenttypes
from django.utils import httpwrappers
def shortcut(request, content_type_id, object_id):
"Redirect to an object's page based on a content-type ID and an object ID."
# Look up the object, making sure it's got a get_absolute_url() function.
try:
content_type = contenttypes.get_object(pk=content_type_id)
obj = content_type.get_object_for_this_type(pk=object_id)
except ObjectDoesNotExist:
raise Http404, "Content type %s object %s doesn't exist" % (content_type_id, object_id)
try:
absurl = obj.get_absolute_url()
except AttributeError:
raise Http404, "%s objects don't have get_absolute_url() methods" % content_type.name
# Try to figure out the object's domain, so we can do a cross-site redirect
# if necessary.
# If the object actually defines a domain, we're done.
if absurl.startswith('http://'):
return httpwrappers.HttpResponseRedirect(absurl)
object_domain = None
# Next, look for an many-to-many relationship to sites
if hasattr(obj, 'get_site_list'):
site_list = obj.get_site_list()
if site_list:
object_domain = site_list[0].domain
# Next, look for a many-to-one relationship to sites
elif hasattr(obj, 'get_site'):
try:
object_domain = obj.get_site().domain
except sites.SiteDoesNotExist:
pass
# Then, fall back to the current site (if possible)
else:
try:
object_domain = sites.get_current().domain
except sites.SiteDoesNotExist:
# Finally, give up and use a URL without the domain name
return httpwrappers.HttpResponseRedirect(obj.get_absolute_url())
return httpwrappers.HttpResponseRedirect('http://%s%s' % (object_domain, obj.get_absolute_url()))
def page_not_found(request):
"""
Default 404 handler, which looks for the requested URL in the redirects
table, redirects if found, and displays 404 page if not redirected.
Templates: `404`
Context: None
"""
t = loader.get_template('404')
return httpwrappers.HttpResponseNotFound(t.render(Context()))
def server_error(request):
"""
500 error handler.
Templates: `500`
Context: None
"""
t = loader.get_template('500')
return httpwrappers.HttpResponseServerError(t.render(Context()))
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