Page change monitor

import { createHash } from 'node:crypto';import { readFile, writeFile } from 'node:fs/promises';const apiKey = process.env.BROWSERCITY_API_KEY;if (!apiKey) {  throw new Error('Set BROWSERCITY_API_KEY before running this script.');}const url = 'https://example.com/terms';const stateFile = './change-monitor-state.json';const response = await fetch('https://api.browser.city/v1/requests', {  method: 'POST',  headers: { Authorization: `Bearer ${apiKey}`, 'Content-Type': 'application/json' },  body: JSON.stringify({ url, markdown: true }),});if (!response.ok) {  throw new Error(`Request failed: ${response.status} ${await response.text()}`);}const page = await response.json();const hash = createHash('sha256').update(page.content).digest('hex');const previous = await readFile(stateFile, 'utf-8')  .then((raw) => JSON.parse(raw) as { hash: string })  .catch(() => null);if (previous && previous.hash !== hash) {  console.log(`CHANGED: ${url}`);  // Notify your channel of choice here (webhook, email, queue message).} else if (!previous) {  console.log(`Baseline recorded for ${url}`);} else {  console.log(`No change for ${url}`);}await writeFile(stateFile, JSON.stringify({ hash, checkedAt: new Date().toISOString() }));

import hashlibimport jsonimport osimport pathlibimport urllib.errorimport urllib.requestfrom datetime import datetime, timezoneAPI_KEY = os.environ["BROWSERCITY_API_KEY"]URL = "https://example.com/terms"STATE_FILE = pathlib.Path("./change-monitor-state.json")request = urllib.request.Request(    "https://api.browser.city/v1/requests",    data=json.dumps({"url": URL, "markdown": True}).encode("utf-8"),    headers={        "Authorization": f"Bearer {API_KEY}",        "Content-Type": "application/json",    },    method="POST",)try:    with urllib.request.urlopen(request, timeout=120) as response:        page = json.loads(response.read().decode("utf-8"))except urllib.error.HTTPError as error:    detail = error.read().decode("utf-8", errors="replace")    raise RuntimeError(f"Request failed: {error.code} {detail}") from errordigest = hashlib.sha256(page["content"].encode("utf-8")).hexdigest()previous = json.loads(STATE_FILE.read_text()) if STATE_FILE.exists() else Noneif previous and previous["hash"] != digest:    print(f"CHANGED: {URL}")    # Notify your channel of choice here (webhook, email, queue message).elif previous is None:    print(f"Baseline recorded for {URL}")else:    print(f"No change for {URL}")STATE_FILE.write_text(    json.dumps({"hash": digest, "checkedAt": datetime.now(timezone.utc).isoformat()}))