added 404 custom page

src/main.rs

@@ -19,6 +19,7 @@ use comrak::{markdown_to_html, ComrakOptions};
 use diesel::pg::PgConnection;
 use dotenv::dotenv;
 use rand::Rng;
+use rocket::Request;
 use rocket_contrib::serve::StaticFiles;
 use rocket_contrib::templates::Template;
 use std::env;
@@ -115,10 +116,26 @@ fn show_post(title: String) -> Template {
     Template::render("post", context)
 }
 
+#[catch(404)]
+fn not_found_404(req: &Request) -> Template {
+    let mut context = Context::new();
+
+    let mut rng = rand::thread_rng();
+    let title_fmt = TITLES[rng.gen_range(0, TITLES.len())];
+    let title = str::replace(title_fmt, "{}", "CódigoComentado");
+
+    let uri = format!("{}", req.uri());
+
+    context.insert("title", &title);
+    context.insert("url", &uri);
+    Template::render("404", context)
+}
+
 fn main() {
     rocket::ignite()
         .attach(Template::fairing())
         .mount("/", routes![index, show_post])
         .mount("/static", StaticFiles::from("static"))
+        .register(catchers![not_found_404])
         .launch();
 }

static/css/404.css

@@ -0,0 +1,19 @@
+.container {
+    display: grid;
+    grid-template-columns: 1fr auto 1fr;
+    grid-template-rows: 1fr 2fr;
+    grid-template-areas:
+        ". title ."
+        ". info .";
+}
+
+.container h1 {
+    grid-area: title;
+    text-align: center;
+}
+
+.container span {
+    grid-area: info;
+    font-family: monospace;
+    font-size: 20px;
+}

templates/404.html.tera

@@ -0,0 +1,13 @@
+{% extends "base" %}
+
+{% block extracss %}
+<link href="/static/css/404.css" rel="stylesheet"/>
+{% endblock extracss %}
+
+{% block content %}
+<h1>404</h1>
+<span>
+  => Error: No matching routes for GET {{ url }} <br/>
+  => Warning: Responding with 404 Not Found catcher.
+</span>
+{% endblock content %}