'use strict';
const http = require('http');
const log = require('./logger');
const { scanWifi } = require('./network');
const { CAPTIVE_DOMAIN } = require('./dns-hijack');
const PORT = 80;
const CAPTIVE_DETECT_PATHS = new Set([
'/hotspot-detect.html', // iOS
'/library/test/success.html', // iOS older
'/generate_204', // Android
'/gen_204', // Android alt
'/connecttest.txt', // Windows
'/ncsi.txt', // Windows alt
'/redirect', // Windows 11
'/canonical.html', // Firefox
]);
/**
* 配网 HTTP 服务器（回调模式）。
*
* 路由：
* GET / → 配网页面（HTML）
* GET /api/scan → WiFi 扫描结果 JSON
* POST /api/connect → 提交 WiFi 凭证，触发 onConnect 回调
* GET /api/status → 当前连接状态
* Captive Portal 检测 → 302 重定向到配网页
*/
class CaptiveServer {
constructor(opts = {}) {
this._server = null;
this._clawId = opts.clawId || '???';
this._onConnect = opts.onConnect || null; // (ssid, password) => Promise<{success, error?}>
}
startListening() {
this._server = http.createServer((req, res) => {
this._handle(req, res).catch(e => {
log.error('http', `${req.method} ${req.url} 异常:`, e.message);
res.writeHead(500, { 'Content-Type': 'application/json' });
res.end(JSON.stringify({ error: '内部错误' }));
});
});
this._server.listen(PORT, '0.0.0.0', () => {
log.info('http', `配网页面就绪: http://${CAPTIVE_DOMAIN} (端口 ${PORT})`);
});
this._server.on('error', (e) => {
if (e.code === 'EACCES') {
log.error('http', `端口 ${PORT} 无权限，请以 root 运行`);
} else if (e.code === 'EADDRINUSE') {
log.error('http', `端口 ${PORT} 已被占用`);
} else {
log.error('http', '服务器错误:', e.message);
}
});
}
stop() {
if (this._server) {
this._server.close();
this._server = null;
}
}
async _handle(req, res) {
const url = new URL(req.url, `http://${req.headers.host || 'localhost'}`);
const pathname = url.pathname;
if (CAPTIVE_DETECT_PATHS.has(pathname)) {
res.writeHead(302, { Location: `http://${CAPTIVE_DOMAIN}/` });
res.end();
return;
}
if (pathname === '/api/scan' && req.method === 'GET') {
return this._apiScan(req, res);
}
if (pathname === '/api/connect' && req.method === 'POST') {
return this._apiConnect(req, res);
}
if (pathname === '/api/status' && req.method === 'GET') {
return this._apiStatus(req, res);
}
res.writeHead(200, {
'Content-Type': 'text/html; charset=utf-8',
'Cache-Control': 'no-cache',
});
res.end(this._renderPage());
}
// ── API ──────────────────────────────────────────────────────────────────
_apiScan(req, res) {
const list = scanWifi();
this._json(res, { wifi: list });
}
async _apiConnect(req, res) {
const body = await readBody(req);
let data;
try { data = JSON.parse(body); } catch (_) {
this._json(res, { success: false, error: 'JSON 格式错误' }, 400);
return;
}
const { ssid, password } = data;
if (!ssid) {
this._json(res, { success: false, error: '请选择 WiFi' }, 400);
return;
}
log.info('http', `用户提交配网: ssid=${ssid}`);
// 先返回响应，让手机端知道设备收到了请求
// （AP 即将关闭，手机会断开连接）
this._json(res, { success: true, message: '正在连接，AP 将临时关闭...' });
// 延迟执行，确保 HTTP 响应送达
if (this._onConnect) {
setTimeout(() => {
this._onConnect(ssid, password || '');
}, 1000);
}
}
_apiStatus(req, res) {
const { hasInternet } = require('./network');
this._json(res, { connected: hasInternet() });
}
_json(res, data, code = 200) {
res.writeHead(code, {
'Content-Type': 'application/json',
'Access-Control-Allow-Origin': '*',
});
res.end(JSON.stringify(data));
}
// ── 配网页面 HTML ───────────────────────────────────────────────────────
_renderPage() {
return `
Claw Box 配网
`;
}
}
function readBody(req) {
return new Promise((resolve, reject) => {
let data = '';
req.on('data', c => { data += c; if (data.length > 4096) req.destroy(); });
req.on('end', () => resolve(data));
req.on('error', reject);
});
}
module.exports = { CaptiveServer };