Simple Web Checker

The Simple Web Checker monitors a URL for content changes. It fetches the page content, computes a SHA-256 hash, and compares it with the hash from the previous state. If the hash differs, an event is emitted.

Configuration

Option	Type	Description
URL	String	The web page URL to monitor for changes.
Timeout (ms)	Integer	HTTP request timeout in milliseconds.

How It Works

1. On the first execution, the checker fetches the URL content and saves its SHA-256 hash as the initial state. No event is emitted.
2. On subsequent executions, the checker fetches the URL again and compares the new hash with the stored hash.
3. If the hashes differ, an event is emitted with the URL as the data payload and the new hash as the updated state.
4. If the hashes match, no event is emitted and the state remains unchanged.

Return Values

Key	Value
data	The Full URL
newState	The new SHA-256 hash of the content of the URL page.