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Dockerfile.txt

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+FROM node:20-slim
+
+WORKDIR /app
+
+COPY package.json ./
+RUN npm install --omit=dev
+
+COPY server.js ./
+COPY public/ public/
+
+# HF Spaces wymaga portu 7860
+ENV PORT=7860
+EXPOSE 7860
+
+CMD ["node", "server.js"]

README.md

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+---
+title: Realtime Translate
+emoji: 🎙
+colorFrom: blue
+colorTo: indigo
+sdk: docker
+app_port: 7860
+pinned: false
+license: other
+tags:
+  - openai
+  - speech
+  - translation
+  - realtime
+  - webrtc
+---
+
+# Realtime Translator — gpt-realtime-translate
+
+Live speech-to-speech translation powered by OpenAI's `gpt-realtime-translate` model.
+
+**Model:** [gpt-realtime-translate](https://platform.openai.com/docs/models/gpt-realtime-translate) by [OpenAI](https://openai.com)
+
+**How to use:**
+1. Enter your OpenAI API key (starts with `sk-`) — stored only in your browser's localStorage
+2. Select source and target language
+3. Click the microphone button and speak
+4. Hear the translated audio and read the transcript
+
+**Or** set `OPENAI_API_KEY` as a Space secret — then the key field is not required.
+
+**Cost:** ~$0.034 / minute of audio (billed by OpenAI).
+
+Built with Node.js + Express + WebRTC.

gitignore.txt

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+node_modules/
+.env

package.json

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+{
+  "name": "realtime-translate",
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "start": "node server.js"
+  },
+  "dependencies": {
+    "express": "^4.19.2"
+  }
+}

server.js

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+import express from "express";
+
+const app = express();
+app.use(express.json());
+app.use(express.static("public"));
+
+const ENV_API_KEY = process.env.OPENAI_API_KEY ?? null;
+
+const SUPPORTED_LANGUAGES = {
+  en: "English", pl: "Polish",  de: "German",  fr: "French",
+  es: "Spanish", it: "Italian", ja: "Japanese", zh: "Chinese",
+  uk: "Ukrainian", ru: "Russian",
+};
+
+app.post("/session", async (req, res) => {
+  const targetLanguage = req.body.targetLanguage ?? "en";
+  const inputLanguage  = req.body.inputLanguage  ?? null;
+
+  // Klucz z env Secrets ma priorytet; fallback na klucz wpisany przez użytkownika w UI
+  const apiKey = ENV_API_KEY ?? req.body.apiKey ?? null;
+
+  if (!apiKey || !apiKey.startsWith("sk-")) {
+    return res.status(401).json({ error: "Brak lub nieprawidłowy klucz API OpenAI." });
+  }
+
+  if (!SUPPORTED_LANGUAGES[targetLanguage]) {
+    return res.status(400).json({ error: `Nieobsługiwany język: ${targetLanguage}` });
+  }
+
+  try {
+    const session = {
+      model: "gpt-realtime-translate",
+      audio: { output: { language: targetLanguage } },
+    };
+
+    if (inputLanguage && SUPPORTED_LANGUAGES[inputLanguage]) {
+      session.audio.input = { language: inputLanguage };
+    }
+
+    const response = await fetch(
+      "https://api.openai.com/v1/realtime/translations/client_secrets",
+      {
+        method: "POST",
+        headers: {
+          Authorization: `Bearer ${apiKey}`,
+          "Content-Type": "application/json",
+        },
+        body: JSON.stringify({ session }),
+      }
+    );
+
+    if (!response.ok) {
+      const err = await response.text();
+      console.error("OpenAI error:", err);
+      return res.status(response.status).json({ error: "Błąd OpenAI API", details: err });
+    }
+
+    res.json(await response.json());
+  } catch (err) {
+    console.error("Fetch error:", err);
+    res.status(500).json({ error: "Błąd serwera", details: err.message });
+  }
+});
+
+const PORT = process.env.PORT ?? 7860;
+app.listen(PORT, "0.0.0.0", () => {
+  console.log(`Serwer działa na porcie ${PORT}`);
+  if (!ENV_API_KEY) {
+    console.log("INFO: OPENAI_API_KEY nie ustawiony — użytkownicy podają klucz przez UI.");
+  }
+});