PHP车辆MOT及税务自动核查程序故障求助

Hey Ryan, sorry to hear your automated MOT/tax checker broke after the gov.uk tweak—small site changes are notorious for breaking scrapers and automation tools. Let’s walk through the most likely issues to investigate:

• DOM Selector Mismatches
  The most common culprit after a site refresh is changed HTML structure. If your program relies on specific class names, IDs, or XPath queries to pull status data, those selectors are probably now invalid. For example, a container that used to have the class vehicle-status-box might now be labeled vehicle-status-card.
  Fix step: Fire up your browser’s dev tools (F12), inspect the vehicle status page, and compare the current element identifiers to what your code was targeting. Update any querySelector or XPath calls to match the new structure.

• API Endpoint Shifts
  If your tool was hitting an official or unofficial API endpoint to fetch data, the gov.uk team might have modified the endpoint URL, request headers, or required parameters. For instance, a POST request that used /check-vehicle-status might now be /api/vehicle-status/v2, or they could require an additional X-Request-ID header.
  Fix step: Use the dev tools’ Network tab to capture the requests made when you manually check a vehicle. Compare those details (URL, headers, payload) to what your program is sending, then adjust your code accordingly.

• Enhanced Anti-Bot Measures
  Small site updates often include stricter anti-scraping checks. Gov.uk might have added a cookie consent wall that your tool isn’t accepting, started validating user-agent strings, or implemented rate limiting. If your program uses a generic user-agent (like python-requests/2.29.0), it might be getting blocked.
  Fix step: Ensure your tool sends a realistic user-agent string, handles cookies (including consent cookies), and adds delays between requests to avoid triggering rate limits. If CAPTCHAs are now in play, you might need to explore CAPTCHA-solving services or switch to an official API if available.

• Data Format Changes
  Even if the UI looks the same, the underlying data format could have shifted. For example, tax expiry dates might now be formatted as DD-MM-YYYY instead of MM/DD/YYYY, or status labels might have changed from "Valid" to "Active". Parsing errors from these changes can crash your entire workflow.
  Fix step: Log the raw data your program is currently extracting and compare it to the expected format. Update your parsing logic to handle the new structure.

• Dynamic JavaScript Rendering
  If gov.uk switched to loading vehicle status data dynamically via JavaScript (instead of server-rendered HTML), tools that only fetch static HTML will no longer see the data.
  Fix step: Disable JavaScript in your browser and reload the status page. If the data disappears, you’ll need to switch to a headless browser tool like Puppeteer or Playwright to render the page’s JS content before scraping.

内容的提问来源于stack exchange，提问作者Ryan Patterson