Deploy Tactiq Playwright from V21 e512f9f

transcript-backend/server.mjs

@@ -0,0 +1,77 @@
+import http from "node:http";
+import { URL } from "node:url";
+import { fetchTranscript } from "youtube-transcript-plus";
+
+const PORT = Number(process.env.TRANSCRIPT_PORT || 8765);
+const HOST = process.env.TRANSCRIPT_HOST || "127.0.0.1";
+const ALLOW_ORIGIN = process.env.ALLOW_ORIGIN || "*";
+
+function json(res, status, payload) {
+  res.writeHead(status, {
+    "Content-Type": "application/json; charset=utf-8",
+    "Access-Control-Allow-Origin": ALLOW_ORIGIN,
+    "Access-Control-Allow-Methods": "GET, OPTIONS",
+    "Access-Control-Allow-Headers": "Content-Type",
+    "Cache-Control": "no-store",
+  });
+  res.end(JSON.stringify(payload));
+}
+
+function extractVideoId(value) {
+  const s = String(value || "").trim();
+  if (/^[A-Za-z0-9_-]{11}$/.test(s)) return s;
+  try {
+    const u = new URL(s);
+    if (u.hostname === "youtu.be") return u.pathname.split("/").filter(Boolean)[0] || null;
+    const v = u.searchParams.get("v");
+    if (v && /^[A-Za-z0-9_-]{11}$/.test(v)) return v;
+    const parts = u.pathname.split("/").filter(Boolean);
+    if (parts.length >= 2 && ["embed", "shorts", "live"].includes(parts[0])) return parts[1];
+  } catch {}
+  return null;
+}
+
+function normalize(items) {
+  return (Array.isArray(items) ? items : []).map((x, i) => ({
+    index: i + 1,
+    start: Number(x.offset ?? x.start ?? x.startTime ?? 0),
+    duration: Number(x.duration ?? 0),
+    text: String(x.text ?? x.content ?? "").replace(/\s+/g, " ").trim(),
+  })).filter(x => x.text);
+}
+
+const server = http.createServer(async (req, res) => {
+  if (req.method === "OPTIONS") return json(res, 204, {});
+  const u = new URL(req.url, `http://${req.headers.host || "localhost"}`);
+
+  if (u.pathname === "/health") return json(res, 200, { ok: true, service: "english-lab-transcript-backend" });
+  if (u.pathname !== "/transcript") return json(res, 404, { ok: false, error: "not_found" });
+
+  const video = extractVideoId(u.searchParams.get("video") || u.searchParams.get("url"));
+  const lang = u.searchParams.get("lang") || undefined;
+  if (!video) return json(res, 400, { ok: false, error: "invalid_youtube_video_id" });
+
+  try {
+    const config = lang ? { lang, retries: 2, retryDelay: 500 } : { retries: 2, retryDelay: 500 };
+    const raw = await fetchTranscript(video, config);
+    const segments = normalize(raw);
+    return json(res, 200, {
+      ok: true,
+      videoId: video,
+      language: lang || null,
+      count: segments.length,
+      segments,
+    });
+  } catch (error) {
+    return json(res, 502, {
+      ok: false,
+      videoId: video,
+      error: "transcript_fetch_failed",
+      message: String(error?.message || error),
+    });
+  }
+});
+
+server.listen(PORT, HOST, () => {
+  console.log(`English Lab transcript backend listening on http://${HOST}:${PORT}`);
+});