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feat: ngrok tunnel integration + @ngrok/ngrok dependency

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BROWSE_TUNNEL=1 env var starts an ngrok tunnel after Bun.serve().
Reads NGROK_AUTHTOKEN from env or ~/.gstack/ngrok.env. Reads
NGROK_DOMAIN for dedicated domain (stable URL). Updates state
file with tunnel URL. Feasibility spike confirmed: SDK works in
compiled Bun binary.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Garry Tan
2026-04-04 16:55:01 -07:00
parent 385748a767
commit bc3ca4b786
3 changed files with 75 additions and 0 deletions
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browse/src/server.ts
+45
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@@ -1873,6 +1873,51 @@ async function start() {
// Initialize sidebar session (load existing or create new)
initSidebarSession();
// ─── Tunnel startup (optional) ────────────────────────────────
// Start ngrok tunnel if BROWSE_TUNNEL=1 is set.
// Reads NGROK_AUTHTOKEN from env or ~/.gstack/ngrok.env.
// Reads NGROK_DOMAIN for dedicated domain (stable URL).
if (process.env.BROWSE_TUNNEL === '1') {
try {
// Read ngrok authtoken from env or config file
let authtoken = process.env.NGROK_AUTHTOKEN;
if (!authtoken) {
const ngrokEnvPath = path.join(process.env.HOME || '', '.gstack', 'ngrok.env');
if (fs.existsSync(ngrokEnvPath)) {
const envContent = fs.readFileSync(ngrokEnvPath, 'utf-8');
const match = envContent.match(/^NGROK_AUTHTOKEN=(.+)$/m);
if (match) authtoken = match[1].trim();
}
}
if (!authtoken) {
console.error('[browse] BROWSE_TUNNEL=1 but no NGROK_AUTHTOKEN found. Set it via env var or ~/.gstack/ngrok.env');
} else {
const ngrok = await import('@ngrok/ngrok');
const domain = process.env.NGROK_DOMAIN;
const forwardOpts: any = {
addr: port,
authtoken,
};
if (domain) forwardOpts.domain = domain;
tunnelListener = await ngrok.forward(forwardOpts);
tunnelUrl = tunnelListener.url();
tunnelActive = true;
console.log(`[browse] Tunnel active: ${tunnelUrl}`);
// Update state file with tunnel URL
const stateContent = JSON.parse(fs.readFileSync(config.stateFile, 'utf-8'));
stateContent.tunnel = { url: tunnelUrl, domain: domain || null, startedAt: new Date().toISOString() };
const tmpState = config.stateFile + '.tmp';
fs.writeFileSync(tmpState, JSON.stringify(stateContent, null, 2), { mode: 0o600 });
fs.renameSync(tmpState, config.stateFile);
}
} catch (err: any) {
console.error(`[browse] Failed to start tunnel: ${err.message}`);
}
}
}
start().catch((err) => {