Replace four raw-string | safe config_field calls with {% call config_field_block %}
blocks so Jinja auto-escaping is preserved for server.hostname, server.name,
blueprint.name, server.rcon_password and g.user.username. Extract a console_form
macro to eliminate the duplicated inline/modal form and restore the missing
placeholder on the modal input. Add XSS regression test that confirms the fix
is load-bearing (test fails when templates are reverted to pre-fix state).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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|---|---|---|
| .. | ||
| alembic | ||
| l4d2web | ||
| scripts | ||
| tests | ||
| alembic.ini | ||
| pyproject.toml | ||
| README.md | ||
l4d2-web-app
Flask web app for managing L4D2 servers through user-private blueprints.
Key v1 behaviors
- Local username/password login; no public signup
- Admin-managed overlay catalog
- Private blueprints per user
- Server creation from blueprints (live-linked; no per-server blueprint overrides)
- Async job model with persisted command logs in
job_logs - Desired vs actual state model
- Live logs for jobs and servers via SSE endpoints
- Host operations go through
l4d2ctlvia a local host command runner, not directl4d2hostimports
Frontend constraints
- Server-rendered templates (Jinja)
- Vendored HTMX (
static/vendor/htmx.min.js) - Custom CSS only
- Tokenized, consistent link and accent colors
Development
From the workspace root (../):
uv sync # creates .venv, installs l4d2host + l4d2web editable, plus dev deps
uv run pytest l4d2web/tests -q
Configuration
The web app reads these settings from the environment:
DATABASE_URL: SQLAlchemy database URL, for examplesqlite:////var/lib/left4me/left4me.db.SECRET_KEY: Flask secret key used for sessions and CSRF-sensitive state.JOB_WORKER_THREADS: number of background job worker threads.
In the systemd deployment, environment is loaded from /etc/left4me/host.env and /etc/left4me/web.env.
Admin Bootstrap
Create the first admin account with the Flask CLI. Provide the password through LEFT4ME_ADMIN_PASSWORD:
LEFT4ME_ADMIN_PASSWORD='change-me' flask create-user <username> --admin