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The `django-sendfile2` module unfortunately only supports a single `SENDFILE` root path -- an invariant which subsequent commits need to break. Especially as Zulip only runs with a single webserver, and thus sendfile backend, the functionality is simple to inline. It is worth noting that the following headers from the initial Django response are _preserved_, if present, and sent unmodified to the client; all other headers are overridden by those supplied by the internal redirect[^1]: - Content-Type - Content-Disposition - Accept-Ranges - Set-Cookie - Cache-Control - Expires As such, we explicitly unset the Content-type header to allow nginx to set it from the static file, but set Content-Disposition and Cache-Control as we want them to be. [^1]: https://www.nginx.com/resources/wiki/start/topics/examples/xsendfile/