Merge branch 'main' of github.com:gruberb/protohackers-rs into main

problem_03/src/server.rs

@@ -57,6 +57,7 @@ async fn main() -> Result<()> {
             // we won't process until we find one.
             match framed.next().await {
                 Some(Ok(username)) => {
+                    if !username.is_empty() && username.is_ascii() {
                         name = username.clone();
                         db.0.lock().unwrap().insert(username.clone(), address);
                         let message = compose_message(username.clone(), db.clone());
@@ -68,6 +69,10 @@ async fn main() -> Result<()> {
                             format!("* {} has entered the room", username),
                         );
                         let _ = tx.send(b);
+                    } else {
+                        return;
+                    }
+
                 }
                 Some(Err(e)) => {
                     error!("Error parsing message: {e}");