chore: release v0.3.1

When `cors_origins` was unset, the WS endpoint only allowed
`http://localhost:<port>` and `http://127.0.0.1:<port>` as origins, so a
browser opening the UI via the LAN IP (e.g. `http://192.168.2.100:8765`
when bound to `0.0.0.0`) had its WebSocket closed with code 4003 and
never recovered — leaving the Web UI in a permanent reconnect loop.

Also accept any `Origin` whose authority matches the request's `Host`
header (both `http://` and `https://` schemes). Same-origin is by
definition not CSWSH, so the cross-origin defence added in v0.3.0
remains intact for genuine third-party LAN pages.

RELEASE_NOTES.md

@@ -1,8 +1,10 @@
-## v0.2.7 (2026-05-19)
+## v0.3.1 (2026-05-25)
+
+Hotfix for the v0.3.0 production-readiness release: the new WebSocket Origin allow-list rejected same-origin connections from any LAN IP, breaking the Web UI on `host: 0.0.0.0` deployments unless `cors_origins` was explicitly configured.
 
 ### Bug Fixes
 
-- **Display tab sliders + accent picker now respond to clicks/drags:** Both the brightness and contrast sliders on the Display tab, and the accent-color picker in the header, were rendering dynamic HTML with inline `oninput` / `onchange` / `onclick` attributes — every one of which the server's strict `script-src 'self'` CSP silently dropped. The result: brightness and contrast couldn't be changed from the WebUI at all, and picking a custom accent did nothing. Replaced the inline attributes with `data-*` markers and wired proper `addEventListener` calls (delegated on the slider container, direct on the accent dropdown), so the controls work under the strict CSP without any `unsafe-inline` / `unsafe-hashes` relaxation. ([e1c8474](https://git.dolgolyov-family.by/alexei.dolgolyov/media-player-server/commit/e1c8474))
+- **WebSocket Origin check now accepts same-origin connections.** When `cors_origins` is unset, the default allow-list was hard-coded to `http://localhost:<port>` + `http://127.0.0.1:<port>`, so a browser opening the UI via the LAN IP (e.g. `http://192.168.2.100:8765`) had its WebSocket closed with code 4003 ("Origin not allowed") and never recovered. The endpoint now also accepts any `Origin` whose authority matches the request's `Host` header (with either `http://` or `https://` scheme) — same-origin connections are by definition not CSWSH, so the cross-origin defence introduced in v0.3.0 is preserved. ([9b9a2b5](https://git.dolgolyov-family.by/alexei.dolgolyov/media-player-server/commit/9b9a2b5))
 
 ---
 
@@ -11,6 +13,6 @@
 
 | Hash | Message | Author |
 |------|---------|--------|
-| [e1c8474](https://git.dolgolyov-family.by/alexei.dolgolyov/media-player-server/commit/e1c8474) | fix(csp): wire display sliders and accent picker without inline on* | alexei.dolgolyov |
+| [9b9a2b5](https://git.dolgolyov-family.by/alexei.dolgolyov/media-player-server/commit/9b9a2b5) | fix(ws): accept same-origin WebSocket connections in default Origin allow-list | alexei.dolgolyov |
 
 </details>

media_server/routes/media.py

@@ -414,8 +414,13 @@ async def websocket_endpoint(
             accept_subprotocol = proto
             break
     effective_token = subprotocol_token or token
-    # Origin check — block CSWSH from third-party LAN pages. We accept the same
-    # set of origins as CORS plus the default localhost loopback.
+    # Origin check — block CSWSH from third-party LAN pages. Accept the same
+    # set of origins as CORS plus the default localhost loopback, AND any
+    # same-origin connection (where Origin matches the request's Host header).
+    # Same-origin is inherently safe from CSWSH because CSWSH is a *cross*-
+    # origin attack — without this, binding to 0.0.0.0 and accessing the UI
+    # via a LAN IP would have its WebSocket rejected by the browser-sent
+    # Origin, which the static allowlist can't anticipate.
     allowed_origins = set(
         settings.cors_origins
         or [
@@ -427,6 +432,15 @@ async def websocket_endpoint(
     # Same-origin connections from native apps may omit Origin entirely; only
     # reject when an Origin is present AND not in the allow-list.
     if origin is not None and origin not in allowed_origins:
+        host_header = websocket.headers.get("host", "")
+        # Origin uses http/https; match against both scheme variants of Host
+        # so HTTPS deployments without an explicit cors_origins still work.
+        same_origin_candidates = (
+            {f"http://{host_header}", f"https://{host_header}"}
+            if host_header
+            else set()
+        )
+        if origin not in same_origin_candidates:
             await websocket.close(code=4003, reason="Origin not allowed")
             return
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "media-server-frontend",
-  "version": "0.2.7",
+  "version": "0.3.0",
   "private": true,
   "description": "Frontend build tooling for media server WebUI",
   "scripts": {

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "media-server"
-version = "0.2.7"
+version = "0.3.1"
 description = "REST API server for controlling system-wide media playback"
 readme = "README.md"
 license = { text = "MIT" }