90 lines
3.2 KiB
Python
90 lines
3.2 KiB
Python
from django.core.exceptions import ObjectDoesNotExist
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from django.template import Context, loader
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from django.contrib.contenttypes.models import ContentType
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from django.contrib.sites.models import Site
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from django import http
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def shortcut(request, content_type_id, object_id):
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"Redirect to an object's page based on a content-type ID and an object ID."
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# Look up the object, making sure it's got a get_absolute_url() function.
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try:
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content_type = ContentType.objects.get(pk=content_type_id)
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obj = content_type.get_object_for_this_type(pk=object_id)
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except ObjectDoesNotExist:
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raise http.Http404, "Content type %s object %s doesn't exist" % (content_type_id, object_id)
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try:
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absurl = obj.get_absolute_url()
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except AttributeError:
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raise http.Http404, "%s objects don't have get_absolute_url() methods" % content_type.name
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# Try to figure out the object's domain, so we can do a cross-site redirect
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# if necessary.
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# If the object actually defines a domain, we're done.
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if absurl.startswith('http://'):
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return http.HttpResponseRedirect(absurl)
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object_domain = None
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# Otherwise, we need to introspect the object's relationships for a
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# relation to the Site object
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opts = obj._meta
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# First, look for an many-to-many relationship to sites
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for field in opts.many_to_many:
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if field.rel.to is Site:
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try:
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object_domain = getattr(obj, field.name).all()[0].domain
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except IndexError:
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pass
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if object_domain is not None:
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break
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# Next look for a many-to-one relationship to site
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if object_domain is None:
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for field in obj._meta.fields:
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if field.rel and field.rel.to is Site:
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try:
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object_domain = getattr(obj, field.name).domain
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except Site.DoesNotExist:
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pass
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if object_domain is not None:
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break
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# Fall back to the current site (if possible)
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if object_domain is None:
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try:
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object_domain = Site.objects.get_current().domain
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except Site.DoesNotExist:
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pass
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# If all that malarkey found an object domain, use it; otherwise fall back
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# to whatever get_absolute_url() returned.
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if object_domain is not None:
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return http.HttpResponseRedirect('http://%s%s' % (object_domain, absurl))
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else:
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return http.HttpResponseRedirect(absurl)
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def page_not_found(request, template_name='404.html'):
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"""
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Default 404 handler, which looks for the requested URL in the redirects
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table, redirects if found, and displays 404 page if not redirected.
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Templates: `404.html`
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Context:
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request_path
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The path of the requested URL (e.g., '/app/pages/bad_page/')
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"""
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t = loader.get_template(template_name)
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return http.HttpResponseNotFound(t.render(Context({'request_path': request.path})))
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def server_error(request, template_name='500.html'):
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"""
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500 error handler.
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Templates: `500.html`
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Context: None
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"""
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t = loader.get_template(template_name)
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return http.HttpResponseServerError(t.render(Context()))
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