def last_modified(self, last_modified):
"""
Add last-modified information
:Parameters:
- `last_modified`: Last modification date (UTC)
:Types:
- `last_modified`: ``datetime.datetime``
"""
self.headers.set('Last-Modified', _httputil.make_date(last_modified))
def cache(self, expiry, audience=None):
"""
Add cache information
:Parameters:
- `expiry`: Expiry time in seconds from now
- `audience`: Caching audience; ``private`` or ``public``
:Types:
- `expiry`: ``int``
- `audience`: ``str``
"""
expiry = max(0, expiry)
self.headers.set('Expires', _httputil.make_date(
_datetime.datetime.utcnow() + _datetime.timedelta(seconds=expiry)
))
fields = ['max-age=%s' % expiry]
if audience in ('private', 'public'):
fields.append(audience)
self.headers.set('Cache-Control', ', '.join(fields))
if expiry == 0:
self.headers.set('Pragma', 'no-cache')
