89 lines
2.8 KiB
JavaScript
89 lines
2.8 KiB
JavaScript
const http = require('http')
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const path = require('path')
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const fs = require('fs')
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const express = require('express')
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const cors = require('cors')
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const { WebSocketServer } = require('ws')
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const db = require('./db')
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const routes = require('./routes')
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const { getSituation } = require('./situationData')
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const app = express()
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const PORT = process.env.API_PORT || 3001
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// 爬虫通知用的共享密钥：API_CRAWLER_TOKEN（仅在服务端与爬虫进程间传递）
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const CRAWLER_TOKEN = process.env.API_CRAWLER_TOKEN || ''
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app.set('trust proxy', 1)
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app.use(cors())
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app.use(express.json())
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app.use('/api', routes)
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app.get('/api/health', (_, res) => res.json({ ok: true }))
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app.post('/api/crawler/notify', (req, res) => {
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// 若配置了 API_CRAWLER_TOKEN，则要求爬虫携带 X-Crawler-Token 头
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if (CRAWLER_TOKEN) {
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const token = req.headers['x-crawler-token']
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if (typeof token !== 'string' || token !== CRAWLER_TOKEN) {
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return res.status(401).json({ error: 'unauthorized' })
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}
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}
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notifyCrawlerUpdate()
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res.json({ ok: true })
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})
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// 生产环境：提供前端静态文件
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const distPath = path.join(__dirname, '..', 'dist')
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if (fs.existsSync(distPath)) {
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app.use(express.static(distPath))
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app.get('*', (req, res, next) => {
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if (!req.path.startsWith('/api') && req.path !== '/ws') {
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res.sendFile(path.join(distPath, 'index.html'))
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} else next()
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})
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}
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const server = http.createServer(app)
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const { getStats } = require('./stats')
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const wss = new WebSocketServer({ server, path: '/ws' })
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wss.on('connection', (ws) => {
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ws.send(JSON.stringify({ type: 'situation', data: getSituation(), stats: getStats() }))
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})
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function broadcastSituation() {
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try {
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const data = JSON.stringify({ type: 'situation', data: getSituation(), stats: getStats() })
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wss.clients.forEach((c) => {
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if (c.readyState === 1) c.send(data)
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})
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} catch (_) {}
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}
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app.set('broadcastSituation', broadcastSituation)
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setInterval(broadcastSituation, 3000)
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// 供爬虫调用：先从磁盘重载 DB（纳入爬虫写入），再更新 updated_at 并立即广播
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function notifyCrawlerUpdate() {
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try {
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const db = require('./db')
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db.reloadFromFile()
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db.prepare("INSERT OR REPLACE INTO situation (id, data, updated_at) VALUES (1, '{}', ?)").run(new Date().toISOString())
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broadcastSituation()
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const n = db.prepare('SELECT COUNT(*) as c FROM situation_update').get().c
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console.log('[crawler/notify] DB 已重载并广播，situation_update 条数:', n)
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} catch (e) {
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console.error('[crawler/notify]', e?.message || e)
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}
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}
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db.initDb().then(() => {
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server.listen(PORT, () => {
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console.log(`API + WebSocket running at http://localhost:${PORT}`)
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console.log(`Swagger docs at http://localhost:${PORT}/api-docs`)
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})
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}).catch((err) => {
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console.error('DB init failed:', err)
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process.exit(1)
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})
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