CR's fixes

service/middleware.go

@@ -259,11 +259,18 @@ func createProxyRequestMiddleware(next http.Handler, config config.Config, servi
 			// extract the original hostname the request was sent to
 			requestHostnameContext := context.WithValue(originRoundtripLatencyContext, RequestHostnameContextKey, r.Host)
 
-			rawBody, err := io.ReadAll(lrw.body)
+			var bodyCopy *bytes.Buffer
+			tee := io.TeeReader(lrw.body, bodyCopy)
+			// read all body from reader into bodyBytes, and copy into bodyCopy
+			bodyBytes, err := io.ReadAll(tee)
 			if err != nil {
 				serviceLogger.Error().Err(err).Msg("can't read lrw.body")
 			}
-			responseContext := context.WithValue(requestHostnameContext, cachemdw.ResponseContextKey, rawBody)
+
+			// replace empty body reader with fresh copy
+			lrw.body = bodyCopy
+			// set body in context
+			responseContext := context.WithValue(requestHostnameContext, cachemdw.ResponseContextKey, bodyBytes)
 
 			enrichedContext := responseContext