Return a 404 when paring the route fails (#3860)

* return a 404 when paring the route fails

* add a playwright test for fullstack routing status codes

* Fix new playwright test

* document SSRError

* Make SSRError public and fix clippy

* Move the error display bound to the routable trait

* fix clippy

* return a more generic 404 message

* fix router tests

packages/fullstack/src/server/mod.rs

@@ -69,6 +69,7 @@ use http::header::*;
 
 use std::sync::Arc;
 
+use crate::render::SSRError;
 use crate::{prelude::*, ContextProviders};
 
 /// A extension trait with utilities for integrating Dioxus with your Axum router.
@@ -413,10 +414,17 @@ pub async fn render_handler(
             apply_request_parts_to_response(headers, &mut response);
             Result::<http::Response<axum::body::Body>, StatusCode>::Ok(response)
         }
-        Err(e) => {
+        Err(SSRError::Incremental(e)) => {
             tracing::error!("Failed to render page: {}", e);
             Ok(report_err(e).into_response())
         }
+        Err(SSRError::Routing(e)) => {
+            tracing::trace!("Page not found: {}", e);
+            Ok(Response::builder()
+                .status(StatusCode::NOT_FOUND)
+                .body(Body::from("Page not found"))
+                .unwrap())
+        }
     }
 }