homelab-brain/smart-home/scripts/grafana_shot.js

const puppeteer = require('/opt/webpage-screenshot-mcp/node_modules/puppeteer');

(async () => {
  const url = process.argv[2];
  const out = process.argv[3] || '/tmp/shot.png';
  const user = process.env.GF_USER || 'admin';
  const pass = process.env.GF_PASS || 'astral66';
  const base = new URL(url);
  const loginUrl = `${base.protocol}//${base.host}/login`;

  const browser = await puppeteer.launch({
    headless: true,
    args: [
      '--no-sandbox',
      '--disable-dev-shm-usage',
      '--disable-gpu',
    ],
    defaultViewport: { width: 1920, height: 1400 },
  });
  const page = await browser.newPage();

  const res = await page.evaluate(
    async (loginUrl, user, pass) => {
      const r = await fetch(loginUrl, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ user, password: pass }),
      });
      return r.status;
    },
    loginUrl,
    user,
    pass
  ).catch(() => null);

  await page.goto(loginUrl, { waitUntil: 'domcontentloaded' });
  await page.evaluate(
    async (loginUrl, user, pass) => {
      await fetch(loginUrl, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        credentials: 'include',
        body: JSON.stringify({ user, password: pass }),
      });
    },
    loginUrl,
    user,
    pass
  );

  await page.goto(url, { waitUntil: 'networkidle2', timeout: 60000 });
  await new Promise((r) => setTimeout(r, 6000));
  await page.screenshot({ path: out, fullPage: false });
  console.log('saved', out);
  await browser.close();
})().catch((e) => {
  console.error('ERR', e.message);
  process.exit(1);
});