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188
test2/server/app.js
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188
test2/server/app.js
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require('dotenv').config();
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const express = require('express');
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const cors = require('cors');
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const path = require('path');
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const db = require('./db');
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const voiceRoutes = require('./routes/voice');
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const chatRoutes = require('./routes/chat');
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const sessionRoutes = require('./routes/session');
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// ========== 环境变量校验 ==========
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function validateEnv() {
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const required = [
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{ key: 'VOLC_RTC_APP_ID', desc: 'RTC 应用 ID' },
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{ key: 'VOLC_RTC_APP_KEY', desc: 'RTC 应用密钥' },
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{ key: 'VOLC_ACCESS_KEY_ID', desc: '火山引擎 AccessKey ID' },
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{ key: 'VOLC_SECRET_ACCESS_KEY', desc: '火山引擎 Secret Access Key' },
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{ key: 'VOLC_S2S_APP_ID', desc: 'S2S 端到端语音 AppID' },
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{ key: 'VOLC_S2S_TOKEN', desc: 'S2S 端到端语音 Token' },
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{ key: 'VOLC_ARK_ENDPOINT_ID', desc: '方舟 LLM 推理接入点 ID' },
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];
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const missing = [];
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const placeholder = [];
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for (const { key, desc } of required) {
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const val = process.env[key];
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if (!val) {
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missing.push({ key, desc });
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} else if (val.startsWith('your_')) {
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placeholder.push({ key, desc });
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}
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}
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if (missing.length > 0) {
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console.warn('\n⚠️ 以下必需环境变量未设置：');
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missing.forEach(({ key, desc }) => console.warn(` ❌ ${key} — ${desc}`));
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}
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if (placeholder.length > 0) {
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console.warn('\n⚠️ 以下环境变量仍为占位符（Mock 模式）：');
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placeholder.forEach(({ key, desc }) => console.warn(` 🔶 ${key} — ${desc}`));
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}
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const ready = missing.length === 0 && placeholder.length === 0;
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if (ready) {
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console.log('✅ 所有环境变量已配置');
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} else {
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console.warn('\n💡 请编辑 server/.env 填入真实凭证，当前将以 Mock 模式运行');
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}
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// 可选变量提示
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const optional = [
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{ key: 'COZE_API_TOKEN', desc: 'Coze 智能体（文字对话）' },
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{ key: 'COZE_BOT_ID', desc: 'Coze Bot ID' },
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{ key: 'VOLC_WEBSEARCH_API_KEY', desc: '联网搜索' },
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{ key: 'VOLC_S2S_SPEAKER_ID', desc: '自定义音色' },
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{ key: 'VOLC_ARK_KNOWLEDGE_BASE_IDS', desc: '方舟私域知识库（语音）' },
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];
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const configuredOptional = optional.filter(({ key }) => {
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const v = process.env[key];
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return v && !v.startsWith('your_');
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});
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if (configuredOptional.length > 0) {
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console.log(`📦 可选功能已启用：${configuredOptional.map(o => o.desc).join('、')}`);
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}
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return ready;
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}
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// ========== Express 应用 ==========
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const app = express();
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const PORT = process.env.PORT || 3001;
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app.use(cors());
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// RTC Function Calling 回调不带 Content-Type，必须在标准 body parser 之前手动读取
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// 全局序列号：在 body 读取前同步分配，确保反映真实请求到达顺序
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let fcCallbackSeq = 0;
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app.post('/api/voice/fc_callback', (req, res, next) => {
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const seq = ++fcCallbackSeq; // 同步分配，在任何异步操作之前
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if (!req.headers['content-type']) {
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const chunks = [];
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req.on('data', (chunk) => chunks.push(chunk));
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req.on('end', () => {
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const rawBuf = Buffer.concat(chunks);
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const raw = rawBuf.toString('utf-8');
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console.log(`[RawBody] seq=${seq} Read ${rawBuf.length} bytes`);
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// 将所有回调原始内容追加到日志文件
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try {
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const fs = require('fs');
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fs.appendFileSync('fc_all_callbacks.log', `\n=== SEQ=${seq} TIME=${new Date().toISOString()} BYTES=${rawBuf.length} ===\n${raw}\n`);
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} catch(e) {}
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try { req.body = JSON.parse(raw); } catch (e) { console.error('[RawBody] JSON parse failed:', e.message); req.body = { _raw: raw }; }
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req.body._seq = seq;
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next();
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});
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req.on('error', (err) => {
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console.error('[RawBody] Error:', err.message);
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next();
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});
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} else {
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req.body = req.body || {};
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req.body._seq = seq;
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next();
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}
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});
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app.use(express.json({ limit: '1mb' }));
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app.use(express.urlencoded({ extended: true, limit: '1mb' }));
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// 请求日志中间件
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app.use((req, res, next) => {
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const start = Date.now();
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res.on('finish', () => {
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const ms = Date.now() - start;
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if (req.path.startsWith('/api/')) {
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console.log(`[${req.method}] ${req.path} → ${res.statusCode} (${ms}ms)`);
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}
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});
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next();
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});
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app.use('/api/voice', voiceRoutes);
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app.use('/api/chat', chatRoutes);
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app.use('/api/session', sessionRoutes);
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// 静态文件服务
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app.use(express.static('../client/dist'));
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// 处理单页应用路由
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app.get('*', (req, res) => {
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res.sendFile(path.join(__dirname, '../client/dist/index.html'));
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});
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app.get('/api/health', (req, res) => {
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const envReady = !process.env.VOLC_RTC_APP_ID?.startsWith('your_');
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res.json({
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status: 'ok',
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mode: 's2s-hybrid',
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apiVersion: '2024-12-01',
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configured: envReady,
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features: {
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voiceChat: true,
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textChat: !!process.env.COZE_API_TOKEN && !process.env.COZE_API_TOKEN.startsWith('your_') && !!process.env.COZE_BOT_ID && !process.env.COZE_BOT_ID.startsWith('your_'),
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textChatProvider: 'coze',
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webSearch: !!process.env.VOLC_WEBSEARCH_API_KEY && !process.env.VOLC_WEBSEARCH_API_KEY.startsWith('your_'),
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customSpeaker: !!process.env.VOLC_S2S_SPEAKER_ID && !process.env.VOLC_S2S_SPEAKER_ID.startsWith('your_'),
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arkKnowledgeBase: !!process.env.VOLC_ARK_KNOWLEDGE_BASE_IDS && !process.env.VOLC_ARK_KNOWLEDGE_BASE_IDS.startsWith('your_'),
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},
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});
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});
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// 统一错误处理中间件
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app.use((err, req, res, _next) => {
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console.error(`[Error] ${req.method} ${req.path}:`, err.message);
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const status = err.status || 500;
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res.status(status).json({
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success: false,
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error: err.message || 'Internal Server Error',
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...(process.env.NODE_ENV !== 'production' && { stack: err.stack }),
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});
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});
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// 404 处理
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app.use((req, res) => {
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res.status(404).json({ success: false, error: `Route not found: ${req.method} ${req.path}` });
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});
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// 启动服务（先初始化数据库）
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async function start() {
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try {
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await db.initialize();
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} catch (err) {
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console.error('[DB] MySQL initialization failed:', err.message);
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console.warn('[DB] Continuing without database — context switching will use in-memory fallback');
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}
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app.listen(PORT, () => {
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console.log('\n========================================');
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console.log(` 🚀 Voice Chat Backend`);
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console.log(` 📡 http://localhost:${PORT}`);
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console.log(` 🔧 Mode: S2S端到端 + LLM混合 (API v2024-12-01)`);
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console.log('========================================\n');
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validateEnv();
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console.log('');
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});
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}
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start();
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