Extractor that deserializes application/x-www-form-urlencoded, auto-sanitizes,
and provides manual .validate().
Works with just T: DeserializeOwned. If #[derive(Sanitize)] is present,
sanitization happens automatically. If #[derive(Validate)] is present,
.validate() becomes available.
Extractor that deserializes application/json, auto-sanitizes,
and provides manual .validate().
Works with just T: DeserializeOwned. If #[derive(Sanitize)] is present,
sanitization happens automatically. If #[derive(Validate)] is present,
.validate() becomes available.