use read only extensions method and find, rather than mut_extensions and pop

Author: smokytheangel0

src/middleware/log_request.rs

@@ -31,7 +31,7 @@ impl Handler for LogRequests {
         let response_time =
             response_time.as_secs() * 1000 + u64::from(response_time.subsec_nanos()) / 1_000_000;
 
-        if let Some(metadata_length) = req.mut_extensions().pop::<u64>() {
+        if let Some(metadata_length) = req.extensions().find::<u64>() {
             print!(
                 "at={level} method={method} path=\"{path}\" \
                  request_id={request_id} fwd=\"{ip}\" service={time_ms}ms \