Merge a few functions

There's no need to have `poison()`, `poison_root()`, and
`poison_path()`: it is enough to have one, and mark path as
`Option<Path<String>>`, and supply a default.

Signed-off-by: Gergely Nagy <me@gergo.csillger.hu>

src/app.rs

@@ -48,8 +48,8 @@ impl Iocaine {
         let state: StatefulIocaine = Arc::new(self);
 
         let mut app = Router::new()
-            .route("/", get(poison_root))
+            .route("/", get(poison))
-            .route("/{*path}", get(poison_path))
+            .route("/{*path}", get(poison))
             .layer(tower_http::trace::TraceLayer::new_for_http());
 
         if state.config.metrics.enable {
@@ -106,15 +106,20 @@ pub async fn shutdown_signal() {
     }
 }
 
-fn poison(iocaine: &StatefulIocaine, headers: axum::http::HeaderMap, path: &str) -> Html<String> {
+async fn poison(
+    headers: axum::http::HeaderMap,
+    State(iocaine): State<StatefulIocaine>,
+    path: Option<Path<String>>,
+) -> Html<String> {
     let default_host = axum::http::HeaderValue::from_static("<unknown>");
     let host = headers
         .get("host")
         .unwrap_or(&default_host)
         .to_str()
         .unwrap();
+    let path = path.unwrap_or(Path("/".to_string()));
 
-    let garbage = AssembledStatisticalSequences::generate(iocaine, host, path);
+    let garbage = AssembledStatisticalSequences::generate(&iocaine, host, &path);
 
     if iocaine.config.metrics.enable {
         metrics::counter!("iocaine_garbage_served").increment(garbage.len() as u64);
@@ -122,18 +127,3 @@ fn poison(iocaine: &StatefulIocaine, headers: axum::http::HeaderMap, path: &str)
 
     Html(garbage)
 }
-
-async fn poison_root(
-    headers: axum::http::HeaderMap,
-    State(iocaine): State<StatefulIocaine>,
-) -> Html<String> {
-    poison(&iocaine, headers, "/")
-}
-
-async fn poison_path(
-    headers: axum::http::HeaderMap,
-    State(iocaine): State<StatefulIocaine>,
-    Path(path): Path<String>,
-) -> Html<String> {
-    poison(&iocaine, headers, &path)
-}