fix(test): bound codex media path log polling

scripts/e2e/lib/codex-media-path/client.mjs

@@ -1,9 +1,10 @@
 import { createHash, randomBytes, randomUUID } from "node:crypto";
-import fs from "node:fs";
 import { setTimeout as delay } from "node:timers/promises";
 import { WebSocket } from "ws";
 import { PROTOCOL_VERSION } from "../../../../dist/gateway/protocol/index.js";
 import { renderBitmapTextPngBase64 } from "../../../../test/helpers/live-image-probe.ts";
+import { createJsonlRequestTailer } from "./jsonl-request-tail.mjs";
+import { waitForWebSocketOpen } from "./open-websocket.mjs";
 
 const port = process.env.PORT;
 const token = process.env.OPENCLAW_GATEWAY_TOKEN;
@@ -14,6 +15,10 @@ const timeoutSeconds = Number.parseInt(
   process.env.OPENCLAW_CODEX_MEDIA_PATH_TIMEOUT_SECONDS ?? "180",
   10,
 );
+const logTailMaxBytes = Number.parseInt(
+  process.env.OPENCLAW_CODEX_MEDIA_PATH_LOG_TAIL_MAX_BYTES ?? `${2 * 1024 * 1024}`,
+  10,
+);
 
 if (!port || !token) {
   throw new Error("missing PORT/OPENCLAW_GATEWAY_TOKEN");
@@ -29,16 +34,12 @@ function sha256Base64(data) {
   return createHash("sha256").update(Buffer.from(data, "base64")).digest("hex");
 }
 
-function readLoggedRequests() {
-  if (!fs.existsSync(appServerLog)) {
-    return [];
-  }
-  return fs
-    .readFileSync(appServerLog, "utf8")
-    .split("\n")
-    .filter(Boolean)
-    .map((line) => JSON.parse(line));
-}
+const loggedRequests = createJsonlRequestTailer(appServerLog, {
+  maxReadBytes:
+    Number.isSafeInteger(logTailMaxBytes) && logTailMaxBytes > 0
+      ? logTailMaxBytes
+      : 2 * 1024 * 1024,
+});
 
 async function waitFor(label, predicate, timeoutMs) {
   const started = Date.now();
@@ -67,18 +68,7 @@ function wsDataToString(data) {
 
 async function connectGateway() {
   const ws = new WebSocket(`ws://127.0.0.1:${port}`);
-  await new Promise((resolve, reject) => {
-    const timer = setTimeout(() => reject(new Error("gateway ws open timeout")), 45_000);
-    timer.unref?.();
-    ws.once("open", () => {
-      clearTimeout(timer);
-      resolve();
-    });
-    ws.once("error", (error) => {
-      clearTimeout(timer);
-      reject(error);
-    });
-  });
+  await waitForWebSocketOpen(ws, 45_000, "gateway ws open timeout");
 
   const events = [];
   const pending = new Map();
@@ -220,7 +210,7 @@ try {
   const turnRequest = await waitFor(
     "Codex turn/start image input",
     () =>
-      readLoggedRequests().find((request) => {
+      loggedRequests.read().find((request) => {
         if (request.method !== "turn/start") {
           return undefined;
         }

scripts/e2e/lib/codex-media-path/jsonl-request-tail.mjs

@@ -0,0 +1,105 @@
+import fs from "node:fs";
+
+const DEFAULT_MAX_READ_BYTES = 2 * 1024 * 1024;
+const DEFAULT_HISTORY_LIMIT = 1024;
+
+function positiveInteger(value, fallback) {
+  return Number.isSafeInteger(value) && value > 0 ? value : fallback;
+}
+
+function readSlice(filePath, start, length) {
+  if (length <= 0) {
+    return "";
+  }
+  const fd = fs.openSync(filePath, "r");
+  try {
+    const buffer = Buffer.allocUnsafe(length);
+    const bytesRead = fs.readSync(fd, buffer, 0, length, start);
+    return buffer.subarray(0, bytesRead).toString("utf8");
+  } finally {
+    fs.closeSync(fd);
+  }
+}
+
+export function createJsonlRequestTailer(filePath, options = {}) {
+  const maxReadBytes = positiveInteger(options.maxReadBytes, DEFAULT_MAX_READ_BYTES);
+  const historyLimit = positiveInteger(options.historyLimit, DEFAULT_HISTORY_LIMIT);
+  let offset = 0;
+  let pending = "";
+  let requests = [];
+
+  function parseLine(line) {
+    try {
+      return JSON.parse(line);
+    } catch (error) {
+      const message = error instanceof Error ? error.message : String(error);
+      throw new Error(`invalid app-server JSONL at ${filePath}: ${message}`);
+    }
+  }
+
+  return {
+    read() {
+      if (!fs.existsSync(filePath)) {
+        return requests;
+      }
+
+      const stats = fs.statSync(filePath);
+      if (!stats.isFile()) {
+        return requests;
+      }
+      if (stats.size < offset) {
+        offset = 0;
+        pending = "";
+        requests = [];
+      }
+      if (stats.size === offset) {
+        return requests;
+      }
+
+      let start = offset;
+      let discardFirstLine = false;
+      let clamped = false;
+      if (start === 0 && stats.size > maxReadBytes) {
+        start = stats.size - maxReadBytes;
+        pending = "";
+        clamped = true;
+      } else if (stats.size - start > maxReadBytes) {
+        start = stats.size - maxReadBytes;
+        pending = "";
+        clamped = true;
+      }
+      if (clamped && start > 0) {
+        discardFirstLine = readSlice(filePath, start - 1, 1) !== "\n";
+      }
+
+      const text = readSlice(filePath, start, stats.size - start);
+      offset = stats.size;
+      if (!text) {
+        return requests;
+      }
+
+      let chunk = pending + text;
+      if (discardFirstLine) {
+        const newlineIndex = chunk.indexOf("\n");
+        if (newlineIndex === -1) {
+          pending = "";
+          return requests;
+        }
+        chunk = chunk.slice(newlineIndex + 1);
+      }
+
+      const lines = chunk.split("\n");
+      pending = lines.pop() ?? "";
+      for (const line of lines) {
+        if (!line.trim()) {
+          continue;
+        }
+        requests.push(parseLine(line));
+      }
+      if (requests.length > historyLimit) {
+        requests = requests.slice(-historyLimit);
+      }
+      return requests;
+    },
+  };
+}

scripts/e2e/lib/codex-media-path/open-websocket.mjs

@@ -0,0 +1,40 @@
+export function waitForWebSocketOpen(ws, timeoutMs, message = "gateway ws open timeout") {
+  return new Promise((resolve, reject) => {
+    let settled = false;
+
+    const settle = (fn, value) => {
+      if (settled) {
+        return;
+      }
+      settled = true;
+      clearTimeout(timer);
+      ws.off?.("open", onOpen);
+      ws.off?.("error", onError);
+      fn(value);
+    };
+    const onOpen = () => settle(resolve);
+    const onError = (error) => settle(reject, error);
+    const timer = setTimeout(() => {
+      const consumeAbortError = () => {};
+      const removeAbortErrorConsumer = () => {
+        ws.off?.("error", consumeAbortError);
+        ws.off?.("close", removeAbortErrorConsumer);
+      };
+      try {
+        ws.off?.("error", onError);
+        ws.on?.("error", consumeAbortError);
+        ws.once?.("close", removeAbortErrorConsumer);
+        ws.terminate?.();
+        if (typeof ws.terminate !== "function") {
+          ws.close?.();
+        }
+      } finally {
+        settle(reject, new Error(message));
+      }
+    }, timeoutMs);
+
+    timer.unref?.();
+    ws.once("open", onOpen);
+    ws.once("error", onError);
+  });
+}