Feat : Skills

open-sse/handlers/ttsProviders/edgeTts.js

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+// Microsoft Edge / Bing TTS (no auth) — via Bing translator endpoint
+import { Buffer } from "node:buffer";
+import { UA } from "./_base.js";
+
+const REFRESH_MS = 5 * 60 * 1000; // token TTL ~1h, refresh early
+const VOICES_TTL = 24 * 60 * 60 * 1000;
+
+const cache = { token: null, tokenTime: 0 };
+let _voicesCache = null;
+let _voicesCacheTime = 0;
+
+async function getToken() {
+  const now = Date.now();
+  if (cache.token && now - cache.tokenTime < REFRESH_MS) return cache.token;
+  const res = await fetch("https://www.bing.com/translator", {
+    headers: { "User-Agent": UA, "Accept-Language": "vi,en-US;q=0.9,en;q=0.8" },
+  });
+  if (!res.ok) throw new Error(`Bing translator fetch failed: ${res.status}`);
+  const rawCookies = res.headers.getSetCookie?.() || [];
+  const cookie = rawCookies.map((c) => c.split(";")[0]).join("; ");
+  const html = await res.text();
+  const match = html.match(/params_AbusePreventionHelper\s*=\s*\[([^,]+),([^,]+),/);
+  if (!match) throw new Error("Failed to parse Bing token");
+  cache.token = { key: match[1], token: match[2].replace(/"/g, ""), cookie };
+  cache.tokenTime = now;
+  return cache.token;
+}
+
+async function ttsRequest(text, voiceId, token) {
+  const parts = voiceId.split("-");
+  const xmlLang = parts.slice(0, 2).join("-");
+  const gender = voiceId.toLowerCase().includes("male") ? "Male" : "Female";
+  const ssml = `<speak version='1.0' xml:lang='${xmlLang}'><voice xml:lang='${xmlLang}' xml:gender='${gender}' name='${voiceId}'><prosody rate='0.00%'>${text}</prosody></voice></speak>`;
+  const body = new URLSearchParams();
+  body.append("ssml", ssml);
+  body.append("token", token.token);
+  body.append("key", token.key);
+  return fetch("https://www.bing.com/tfettts?isVertical=1&&IG=1&IID=translator.5023&SFX=1", {
+    method: "POST",
+    body: body.toString(),
+    headers: {
+      "Content-Type": "application/x-www-form-urlencoded",
+      "Accept": "*/*",
+      "Origin": "https://www.bing.com",
+      "Referer": "https://www.bing.com/translator",
+      "User-Agent": UA,
+      ...(token.cookie ? { "Cookie": token.cookie } : {}),
+    },
+  });
+}
+
+export async function fetchEdgeTtsVoices() {
+  const now = Date.now();
+  if (_voicesCache && now - _voicesCacheTime < VOICES_TTL) return _voicesCache;
+  const res = await fetch(
+    "https://speech.platform.bing.com/consumer/speech/synthesize/readaloud/voices/list?trustedclienttoken=6A5AA1D4EAFF4E9FB37E23D68491D6F4",
+    { headers: { "User-Agent": UA } }
+  );
+  if (!res.ok) throw new Error(`Edge TTS voices fetch failed: ${res.status}`);
+  const voices = await res.json();
+  _voicesCache = voices;
+  _voicesCacheTime = now;
+  return voices;
+}
+
+export default {
+  noAuth: true,
+  async synthesize(text, model) {
+    const voiceId = model || "vi-VN-HoaiMyNeural";
+    let token = await getToken();
+    let res = await ttsRequest(text, voiceId, token);
+
+    // 429/403: invalidate cache and retry once
+    if (res.status === 429 || res.status === 403) {
+      cache.token = null;
+      cache.tokenTime = 0;
+      token = await getToken();
+      res = await ttsRequest(text, voiceId, token);
+    }
+
+    if (!res.ok) {
+      const body = await res.text().catch(() => "");
+      throw new Error(`Bing TTS failed: ${res.status}${body ? " - " + body : ""}`);
+    }
+    const buf = await res.arrayBuffer();
+    if (buf.byteLength < 1024) throw new Error("Bing TTS returned empty audio");
+    return { base64: Buffer.from(buf).toString("base64"), format: "mp3" };
+  },
+};