Caching allows serve content faster by storing pre-generated content in memory instead of generating content fully from the scratch for every request.
You can pass http_cache (seconds) to both py:func:websauna.system.core.route.simple_route and :py:func:`pyramid.view.view_config` decorators to set caching time for the resulting HTTP response in the front end web server. The front end web server must be properly tuned for caching (Cloudflare, Apache mod_cache, Nginx proxy_cache, Varnish).
You need to set public option to generate Cache-control: public header, or otherwise pages are not cached for HTTPS connections.
Example:
from websauna.system.core.route import simple_route
@simple_route("/calendar-widget",
route_name="calendar_widget",
renderer="partners/calendar_widget.html",
http_cache=(3600, {"public": True}))
def calendar_widget(request: Request)
# ...More information
from pyramid.response import Response
@simple_route("/partner-rss-feed", route_name="partner_rss_feed")
def partner_rss_feed(request: Request):
"""Media partners ICO RSS feed."""
items = get_partner_rss_feed_items(request.dbsession)
feed = generate_rss(request, items)
# Generate RSS feed response
resp = Response(body=feed.rss(), content_type="application/rss+xml")
# Ten minutes
cache_timeout = 10*60
# Set cache headers for downstream web server (Cloudflare)
# so that we don't hit the back end for every request
resp.cache_expires = cache_timeout
resp.cache_control.public = True # Needed to cache HTTPS content
return resp