add not_found catcher for 404 errors

src/api/web.rs

@@ -1,7 +1,7 @@
 use std::path::{Path, PathBuf};
 
 use rocket::serde::json::Json;
-use rocket::{fs::NamedFile, http::ContentType, Route};
+use rocket::{fs::NamedFile, http::ContentType, Catcher, Route};
 use serde_json::Value;
 
 use crate::{
@@ -21,6 +21,19 @@ pub fn routes() -> Vec<Route> {
     }
 }
 
+pub fn catchers() -> Vec<Catcher> {
+    if CONFIG.web_vault_enabled() {
+        catchers![not_found]
+    } else {
+        catchers![]
+    }
+}
+
+#[catch(404)]
+async fn not_found() -> Cached<Option<NamedFile>> {
+    Cached::short(NamedFile::open(Path::new(&CONFIG.web_vault_folder()).join("404.html")).await.ok(), false)
+}
+
 #[get("/")]
 async fn web_index() -> Cached<Option<NamedFile>> {
     Cached::short(NamedFile::open(Path::new(&CONFIG.web_vault_folder()).join("index.html")).await.ok(), false)