Adjust how bytes_received is calculated in the HTTP blackhole

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+## Changed
+- The `bytes_received` metric in the HTTP blackhole now tracks raw bytes, the
+  former metric is preserved with `decoded_bytes_received`.
+
 ## [0.25.1]
 ## Removed
 - Revert PR #1148

lading/src/blackhole/http.rs

@@ -138,11 +138,12 @@ async fn srv(
     let (parts, body) = req.into_parts();
 
     let bytes = body.collect().await?.to_bytes();
+    counter!("bytes_received", &metric_labels).increment(bytes.len() as u64);
 
     match crate::codec::decode(parts.headers.get(hyper::header::CONTENT_ENCODING), bytes) {
         Err(response) => Ok(response),
         Ok(body) => {
-            counter!("bytes_received", &metric_labels).increment(body.len() as u64);
+            counter!("decoded_bytes_received", &metric_labels).increment(body.len() as u64);
 
             tokio::time::sleep(response_delay).await;