fix(map): fingerprint static assets on release

vehicle-map/server.py

@@ -18,6 +18,17 @@ from urllib.request import Request, urlopen
 
 
 ROOT = Path(__file__).resolve().parent
+
+
+def _static_asset_version():
+    """Content fingerprint used to bypass upstream static-asset caches on release."""
+    digest = hashlib.sha256()
+    for filename in ("app.js", "styles.css"):
+        digest.update((ROOT / filename).read_bytes())
+    return digest.hexdigest()[:16]
+
+
+STATIC_ASSET_VERSION = _static_asset_version()
 HOST = os.getenv("VEHICLE_MAP_HOST", "0.0.0.0")
 PORT = int(os.getenv("VEHICLE_MAP_PORT", "20800"))
 OPEN_PLATFORM_BASE_URL = os.getenv("OPEN_PLATFORM_BASE_URL", "https://open.d.lnoneos.com").rstrip("/")
@@ -293,6 +304,9 @@ class VehicleMapHandler(SimpleHTTPRequestHandler):
 
     def do_GET(self):
         path = urlparse(self.path).path
+        if path in {"/", "/index.html"}:
+            self._serve_index()
+            return
         if path == "/api/health":
             self._write_json(200, {
                 "status": "ok",
@@ -380,6 +394,21 @@ class VehicleMapHandler(SimpleHTTPRequestHandler):
         })
         return False
 
+    def _serve_index(self):
+        try:
+            template = (ROOT / "index.html").read_text(encoding="utf-8")
+            body = template.replace("__ASSET_VERSION__", STATIC_ASSET_VERSION).encode("utf-8")
+        except OSError as exc:
+            self.log_error("index template unavailable: %s", exc)
+            self.send_error(500, "Map application is temporarily unavailable")
+            return
+        self.send_response(200)
+        self.send_header("Content-Type", "text/html; charset=utf-8")
+        self.send_header("Content-Length", str(len(body)))
+        self.send_header("Cache-Control", "no-cache")
+        self.end_headers()
+        self.wfile.write(body)
+
     def end_headers(self):
         if self.path == "/" or self.path.split("?", 1)[0].endswith((".html", ".css", ".js", ".svg")):
             self.send_header("Cache-Control", "no-cache")