Module redirects 

Redirection module to handle config redirect URLs with pattern matching support.

Security: ReDoS / pattern complexity

Redirect/rewrite source patterns are admin-supplied at startup. SWS uses regex_lite, which has no backtracking (linear-time NFA engine), so the classic catastrophic-backtracking ReDoS class does not apply. However:

• Per-request work is still proportional to pattern_size * uri_len. To bound it, requests with URI paths longer than the internal matching cap are skipped (no regex evaluation, no redirect).
• Operators should treat redirect patterns as trusted configuration and avoid loading them from untrusted sources.

Functions

get_redirection

It returns a redirect’s destination path and status code if the current request uri matches against the provided redirect’s array.