Cache in only in Django (as database caching) and not in browser

Question

I've tried a lot of things, and they all failed. My Django (2.0) website has some pages which take a lot of time to generate. I want to keep this pages in the database cache of the Django server until the database changed. My goal:

Have pages ready in database cache
Serve users the cached pages
Don't save these pages as cache in the browser (the browser can't know if the page needs to be re-generated)
Keep .js files etc as cache in browser
Don't use browser cache when using the browser 'back' button to go back to the calculation heavy page

The closest I got was to enable database caching, enabled per-site caching, and using cache.clear() on receiving post_save and post_delete signals. But still, if I pressed 'back' in my browser, the local cache was used (so no request was send to the server). I tried to fix this by adding @never_cache to the view, but this also prevented caching in the middleware...

score 1 · Answer 1 · answered Mar 02 '23 at 08:16

Hi，I encountered a similar situation, when I used cache_page in Django,


urlpatterns = [
    path(
        'xxx',
        cache_page(
            settings.CACHE_TTL, key_prefix='xxx'
        )(xxx),
        name='xxx'
    ),
]

it will add one response header in the response:

cache-control: max-age=600

Then the browser will not request new data even my cache data have changed in 10 minute.

My solution is change the response header at nginx:

location ~ (/xxx|/yyy) {
    # ...
    proxy_hide_header Cache-Control;
    add_header Cache-Control no-store;
    
    # ...
}

Cache in only in Django (as database caching) and not in browser

1 Answers1