0.2.6-dev: traffic counters — HTTP body bytes by category (assets / audio / code / data) and WebSocket wire / payload bytes since the start at GET /healthz?traffic=1, and the page's own downloads (Resource Timing transferSize) as a traffic line in the 问题反馈 diagnostics (host bandwidth layer 0.4); golden: unchanged

server/index.js

@@ -11,6 +11,8 @@
 //   http/files.js      one file → response: MIME, gzip + memory cache, ETag / Last-Modified / 304, Cache-Control, ranges
 //   http/buildTag.js   the build tag of the served browser runtime (/healthz `build`, public/js/ui/buildGuard.js)
 //   http/routes.js     the request listener: security headers, 414 / 400 / 405, GET /healthz → JSON status, else static
+//   http/traffic.js    the traffic counters: bytes sent per category (assets / audio / code / data) and on the
+//                      WebSocket, since the start (GET /healthz?traffic=1)
 //   http/common.js     what every answer shares: security headers, URL split, error page, JSON replies, bare 400
 //   http/boot.js       a pending update package first (update.js: old files deleted, the install verified against
 //                      MANIFEST.json), banner (Local / LAN / tunnel URLs), port-in-use hint, graceful shutdown on SIGINT /
@@ -31,6 +33,7 @@ import { createPackRegistry } from './packs.js';
 import { MIME, COMPRESSIBLE, acceptsGzip, parseRange } from './http/files.js';
 import { BUILD_INPUTS, computeBuildTag, buildTag, resetBuildTag } from './http/buildTag.js';
 import { createRequestHandler } from './http/routes.js';
+import { createTrafficCounter } from './http/traffic.js';
 import { answerClientError } from './http/common.js';
 import { lanUrls, displayHost, isProcessEntry, runMain } from './http/boot.js';
 
@@ -54,7 +57,7 @@ export {
  * @returns {Promise<{ port: number, host: string, url: string, server: http.Server, wss: import('ws').WebSocketServer,
  *                     lobby: import('./lobby.js').Lobby, network: import('./net.js').Network,
  *                     registry: import('./net.js').SessionRegistry, packs: ReturnType<typeof createPackRegistry>,
- *                     close: () => Promise<void> }>}
+ *                     traffic: ReturnType<typeof createTrafficCounter>, close: () => Promise<void> }>}
  */
 export async function startServer(opts = {}) {
   const { port, host } = listenAddress(opts);
@@ -73,9 +76,10 @@ export async function startServer(opts = {}) {
   resetBuildTag();
   buildTag();
 
-  const server = http.createServer(createRequestHandler({ serveStatic, health: { startedAt, network, registry, lobby }, log }));
+  const traffic = createTrafficCounter();
+  const server = http.createServer(createRequestHandler({ serveStatic, health: { startedAt, network, registry, lobby, traffic }, log }));
   server.on('clientError', answerClientError);
-  const wss = attachWebSocket(server, { network, log });
+  const wss = attachWebSocket(server, { network, log, traffic });
 
   // The address actually bound. The default may fall back to IPv4; the returned host and url follow that.
   let boundHost;
@@ -132,7 +136,7 @@ export async function startServer(opts = {}) {
     return closing;
   }
 
-  return { port: actualPort, host: boundHost, url, server, wss, lobby, network, registry, packs, close };
+  return { port: actualPort, host: boundHost, url, server, wss, lobby, network, registry, packs, traffic, close };
 }
 
 // `node server/index.js` / npm start: listen, print the banner, stop on SIGINT / SIGTERM (http/boot.js).