Does BigQuery contain HAR Archive or cookies of crawled webpages?

5

I’m seeing ~30% of cookies having stripped bytes:

CREATE TEMPORARY FUNCTION extractHeader(payload STRING, name STRING)
RETURNS STRING LANGUAGE js AS '''
try {
  var $ = JSON.parse(payload);
  var header = $._headers.response.find(h => h.toLowerCase().startsWith(name.toLowerCase()));
  if (!header) {
    return null;
  }
  return header.substr(header.indexOf(':') + 1).trim();
} catch (e) {
  return null;
}
''';

SELECT
  COUNTIF(REGEXP_CONTAINS(cookie, r'bytes were stripped')) AS stripped_bytes,
  COUNT(0) AS total_reqs,
  COUNTIF(REGEXP_CONTAINS(cookie, r'bytes were stripped')) / COUNT(0) AS pct_stripped_bytes
FROM (
  SELECT
    extractHeader(payload, 'Set-Cookie') AS cookie
  FROM
    `httparchive.requests.2020_06_01_mobile`)
WHERE
  cookie IS NOT NULL
stripped_bytes total_reqs pct_stripped_bytes
19,671,309 68,839,626 28.58%