#18781: FallbackStorage fails its purpose with uwsgi's default settings
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Reporter: aaugustin | Owner: nobody
Type: Cleanup/optimization | Status: new
Component: contrib.messages | Version: master
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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`FallbackStorage` stores up to 3072 bytes of messages in cookies and the
remainder in the session.
This is controlled by `CookieStorage.max_cookie_size = 3072`.
Unfortunately:
- other HTTP headers can take more than 1024 bytes,
- uwsgi's default `buffer-size` is 4k,
- all the HTTP headers must fit in one uwsgi buffer, otherwise uwsgi
barfs.
[http://projects.unbit.it/uwsgi/wiki/Doc uwsgi's doc] says:
> If you plan to receive big requests with a lot of headers you can
increase this value upto 64k
`uwsgi` is a common WSGI app server. To reduce the likelihood of this
problem, I suggest to reduce `CookieStorage.max_cookie_size` to `2048`.
This is rather arbitrary, but it gives a bit more headroom.
The main purpose of `FallbackStorage` is to store one or two messages in
cookies, to avoid touching the session in possible. 2048 bytes is enough
to store about 25 lines of text.
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Ticket URL: <https://code.djangoproject.com/ticket/18781>
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