webscanner/src/monitor/metadata.js

Automation scanner for web resources

let started = false;

async function start({ client }) {
  started = true;
  await client.Performance.enable();
}

async function stop({ client }) {
  if (!started) {
    return;
  }
  return {
    layoutMetrics: await client.Page.getLayoutMetrics(),
    heapSize: await client.Runtime.getHeapUsage(),
    metrics: await getMetrics(client),
    manifest: await getManifest(client),
  };
}

async function getMetrics(client) {
  try {
    const { metrics } = await client.Performance.getMetrics();
    const res = {};

    if (metrics) {
      for (let i = 0; i < metrics.length; i++) {
        const metric = metrics[i];
        res[metric.name] = metric.value;
      }
    }
    return res;
  } catch (e) {
    //ignore
  }
}

async function getManifest(client) {
  try {
    const manifest = await client.Page.getAppManifest();
    if (manifest && manifest.url) {
      return manifest;
    }
  } catch (e) {
    //ignore
  }
}

module.exports = {
  start,
  stop,
};