stage 7 refactoring

src/main.rs

@@ -71,19 +71,18 @@ async fn process (mut stream: TcpStream, args: A) -> Result<()> {
         "/user-agent" => Response::TextPlain(headers.get("User-Agent").to_owned()),
         // p if let Some(echo) = p.strip_prefix("/echo/") => Response::TextPlain(echo), // a nicer way to do that, not available in stable yet
         p if p.starts_with("/echo/") => Response::TextPlain(p.trim_start_matches("/echo/").to_owned()),
-        p if p.starts_with("/files/") => {
+        p if p.starts_with("/files/") => 'a : {
-            if let Some(path) = &args.directory {
+            let Some(path) = &args.directory else {
+                break 'a Response::_500;
+            };
             let path = path.join(p.trim_start_matches("/files/"));
+            let Ok(mut f) = File::open(path).await else {
+                break 'a Response::_404;
+            };
+
             let mut buf = vec![];
-                if let Ok(mut f) = File::open(path).await {
             let _ = f.read_to_end(&mut buf).await;
             Response::OctetStream(buf)
-                } else {
-                    Response::_404
-                }
-            } else {
-                Response::_500
-            }
         },
         _ => Response::_404,
     };