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nginx: serve mgmt /static/ assets from disk (no Flask round-trip)

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Generated management-domain server blocks now include a
location /static/ aliasing webui/static/ with Cache-Control: no-cache
(ETag revalidation -> 304), nosniff, and a restrictive CSP, so SPA
asset requests no longer reach Flask. Flask's static route remains
the dev-mode fallback.

- lib/nginx.py + daemon/handlers/nginx.py: static_root render context
  (the handler renders the template directly, so both paths need it)
- template: alias uses a trailing slash (nginx concatenates the
  location remainder onto the alias value)
- install.sh: a+rX on webui/static plus execute-up-the-parent-chain
  so the nginx worker (www-data) can traverse repo-in-$HOME installs
- tests: mgmt static location assertions (positive + non-mgmt negative)
- docs: AGENTS.md, architecture.md, security.md static-serving notes
This commit is contained in:
Mike Teehan
2026-09-03 14:58:57 +00:00
parent d78b90db00
commit fc478a016e
8 changed files with 69 additions and 6 deletions
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docs/security.md
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@@ -70,7 +70,7 @@ The `daemon/client.py` module resolves `<param>` placeholders in URL paths befor
### Management Interface
The Flask WebUI binds exclusively to `127.0.0.1:9090`. It is not exposed directly to any network interface. All external access to the management UI is routed through an nginx reverse proxy on the designated management domain, which provides SSL termination. Authentication is handled at the Flask layer via JWT validation — no nginx-level `auth_basic` is applied to the management domain.
The Flask WebUI binds exclusively to `127.0.0.1:9090`. It is not exposed directly to any network interface. All external access to the management UI is routed through an nginx reverse proxy on the designated management domain, which provides SSL termination. Authentication is handled at the Flask layer via JWT validation — no nginx-level `auth_basic` is applied to the management domain. Static assets under `/static/` are served directly by nginx from `webui/static/` (unauthenticated, the same exposure as the Flask static route) with `Cache-Control: no-cache`, `X-Content-Type-Options: nosniff`, and a restrictive `Content-Security-Policy: default-src 'none'`.
JWT tokens are stored in browser `sessionStorage` and injected as `Authorization: Bearer <token>` headers. The API **never** reads cookies — authentication is header-only. This eliminates CSRF concerns: cross-origin requests cannot set custom headers.