def lang_feed(lang):
"""generate atom feed for blog entries in the specific language"""
blog_entries = db.session.query(BlogEntry).filter_by(lang = lang).order_by(BlogEntry.created.desc()).limit(PAGE_SIZE)
updated = blog_entries.first().created if blog_entries.count() > 0 else ''
etag = '"{0}"'.format(hashlib.sha256(str(updated)).hexdigest())
if request.headers.get('If-None-Match', '') == etag:
return '', 304
last_modified = format_date_time(mktime(updated.timetuple()))
if request.headers.get('If-Modified-Since', '') == last_modified:
return '', 304
title = app.config['BLOG_OWNER'] + "'s Thoughts and Writings"
if lang == 'cn':
title = app.config['BLOG_OWNER'] + u'的博客'
feed = AtomFeed(title = title,
url = request.url_root,
feed_url = request.url,
author = app.config['BLOG_OWNER'])
if updated:
feed.updated = updated
for blog_entry in blog_entries:
feed.add(title = blog_entry.title,
content = unicode(blog_entry.content),
content_type = 'html',
author = app.config['BLOG_OWNER'],
url = urljoin(request.url_root, url_for('blog_entry.read', uid = blog_entry.uid)),
updated = blog_entry.updated,
published = blog_entry.created)
response = feed.get_response()
response.headers['ETag'] = etag
response.headers['Last-Modified'] = last_modified
return response
