Some lingering cleanup from the transition from a middleware to a view.
See https://github.com/openedx/edx-platform/issues/34702 for context.
- Remove IMPL and self/StaticContentServer references
- Add newlines to satisfy code style linter
- Fix test references
- Update module docstring
Remove class declaration and simply de-indent contents by 4 spaces.
This results in broken code due to lingering `self` references, but
should make diffs easier to understand.
Final planned portion of https://github.com/openedx/edx-platform/issues/34702 -- waffle flag and middleware are removed.
Commits:
1. Feature change
- Delete `content_server.use_view` waffle flag in favor of always using view
- Delete the husk of `StaticContentServerMiddleware` and references to it
- Update views module docstring
2. Refactor (move)
- Move contentserver implementation into views.py
3. Lint cleanup
- Fix import ordering (from refactor debris + amnestied lint)
See https://github.com/openedx/edx-platform/issues/34702
This necessarily involves switching from calling
`StaticContent.is_versioned_asset_path` to determine whether to handle the
request to having a hardcoded urlpattern. I've made the choice to hardcode
the other two patterns similarly rather than using imported constants. The
mapping of URL patterns to database records should be explicit (even though
we don't expect those constants to change out from under us.)
I've renamed the middleware rather than choosing a new name for the
implementation because there are other references in tests and other code.
This was the smaller change.
A note on HTTP methods: The middleware currently completely ignores the
request's HTTP method, so I wanted to confirm that only GETs were being
used in practice. This query reveals that 99.8% of requests that this
middleware handles are GET, with just a smattering of PROPFIND and OPTIONS
and a tiny number of HEAD and POST:
```
from Transaction select count(*) facet request.method
where name = 'WebTransaction/Function/openedx.core.djangoapps.contentserver.middleware:StaticContentServer'
since 4 weeks ago
```
