Build, test, and debug regular expressions
Matches a 'Redirecting to' message followed by a URL query string, capturing required 'from' and 'exportFileName' parameters as named groups, plus optional 'to', 'lang', and 'action' parameters. Each value permits lowercase letters, digits, and dots (with hyphens allowed for action). Ideal for parsing redirect logs or export/download URLs, such as those produced by Etherpad's export functionality.