# chess-io — reverse proxy for davidwindham.com/chess
# ============================================================================
#
# The chess app is a long-running Node process (see the systemd unit below). It
# is NOT served from the web docroot like the PHP/WordPress parts of the site —
# Apache proxies /chess through to node on 127.0.0.1:8181, exactly the way
# /radio is already wired.
#
# Add the block below to the EXISTING davidwindham.com <VirtualHost> (the same
# one that serves WordPress). Do NOT create a new vhost for it — /chess has to
# live under the main hostname so it is same-origin with the rest of the site;
# that is what lets the client open its websocket with no hardcoded host and
# keeps it from tripping mixed-content blocking on https.
#
# ---------------------------------------------------------------------------
# Requirements
# ---------------------------------------------------------------------------
#
# 1. Apache 2.4.47 or newer. The `upgrade=websocket` option on ProxyPass is what
#    carries the socket.io websocket; it was added in 2.4.47. Check with:
#        httpd -v          (or: apachectl -v)
#
# 2. These modules enabled:
#        a2enmod proxy proxy_http proxy_wstunnel rewrite
#    (proxy_wstunnel is not strictly used by `upgrade=websocket`, but enabling
#    it does no harm and covers older config styles.)
#
# 3. The node app running with BASE_PATH=/chess and TRUST_PROXY=1 — see the
#    systemd unit at the bottom. The /chess prefix is kept on BOTH sides of the
#    ProxyPass on purpose: the app is mounted at /chess and expects to see it.
#
# ---------------------------------------------------------------------------
# Paste inside <VirtualHost *:443> for davidwindham.com (and *:80 if you keep
# a plain-http vhost that isn't a blanket redirect to https).
# ---------------------------------------------------------------------------

    # chess: real-time chess on node, mounted at /chess.
    # Prefix kept on both sides; BASE_PATH=/chess tells the app to expect it.
    # upgrade=websocket carries socket.io at /chess/socket.io (needs httpd 2.4.47+).
    ProxyPass         /chess  http://127.0.0.1:8181/chess  upgrade=websocket
    ProxyPassReverse  /chess  http://127.0.0.1:8181/chess

# ---------------------------------------------------------------------------
# Notes
# ---------------------------------------------------------------------------
#
# * /embed/chrome.js (the shared header/footer) is served by Apache from the
#   WordPress docroot, NOT by this app. Nothing to configure here for it — the
#   page loads it root-relative and it already resolves alongside /chess.
#   DAW_ORIGIN is a LOCAL-DEV-ONLY shim and must stay UNSET in production.
#
# * No trailing-slash rule is needed in Apache: the app itself 301s /chess to
#   /chess/ so relative asset URLs resolve.
#
# * If the old chess.davidawindham.com subdomain vhost is still live, point it
#   at a redirect to https://davidwindham.com/chess/ once this is confirmed
#   working, so old game links don't dead-end.