django1/django/contrib/syndication/feeds.py

90 lines
3.3 KiB
Python

from django.core.exceptions import ImproperlyConfigured, ObjectDoesNotExist
from django.core.template import Context, loader, Template, TemplateDoesNotExist
from django.models.core import sites
from django.utils import feedgenerator
from django.conf.settings import LANGUAGE_CODE, SETTINGS_MODULE
def add_domain(domain, url):
if not url.startswith('http://'):
url = u'http://%s%s' % (domain, url)
return url
class FeedDoesNotExist(ObjectDoesNotExist):
pass
class Feed:
item_pubdate = None
item_enclosure_url = None
feed_type = feedgenerator.DefaultFeed
def __init__(self, slug):
self.slug = slug
def item_link(self, item):
try:
return item.get_absolute_url()
except AttributeError:
raise ImproperlyConfigured, "Give your %s class a get_absolute_url() method, or define an item_link() method in your Feed class." % item.__class__.__name__
def __get_dynamic_attr(self, attname, obj):
attr = getattr(self, attname)
if callable(attr):
try:
return attr(obj)
except TypeError:
return attr()
return attr
def get_feed(self, url=None):
"""
Returns a feedgenerator.DefaultFeed object, fully populated, for
this feed. Raises FeedDoesNotExist for invalid parameters.
"""
if url:
try:
obj = self.get_object(url.split('/'))
except (AttributeError, ObjectDoesNotExist):
raise FeedDoesNotExist
else:
obj = None
current_site = sites.get_current()
link = self.__get_dynamic_attr('link', obj)
link = add_domain(current_site.domain, link)
feed = self.feed_type(
title = self.__get_dynamic_attr('title', obj),
link = link,
description = self.__get_dynamic_attr('description', obj),
language = LANGUAGE_CODE.decode()
)
try:
title_template = loader.get_template('feeds/%s_title' % self.slug)
except TemplateDoesNotExist:
title_template = Template('{{ obj }}')
try:
description_template = loader.get_template('feeds/%s_description' % self.slug)
except TemplateDoesNotExist:
description_template = Template('{{ obj }}')
for item in self.__get_dynamic_attr('items', obj):
link = add_domain(current_site.domain, self.__get_dynamic_attr('item_link', item))
enc = None
enc_url = self.__get_dynamic_attr('item_enclosure_url', item)
if enc_url:
enc = feedgenerator.Enclosure(
url = enc_url.decode('utf-8'),
length = str(self.__get_dynamic_attr('item_enclosure_length', item)).decode('utf-8'),
mime_type = self.__get_dynamic_attr('item_enclosure_mime_type', item).decode('utf-8'),
)
feed.add_item(
title = title_template.render(Context({'obj': item, 'site': current_site})).decode('utf-8'),
link = link,
description = description_template.render(Context({'obj': item, 'site': current_site})).decode('utf-8'),
unique_id = link,
enclosure = enc,
pubdate = self.__get_dynamic_attr('item_pubdate', item),
)
return feed