feat: HTML default page

src/web/mod.rs

@@ -0,0 +1,61 @@
+use askama::Template;
+use axum::{
+	Router,
+	http::{StatusCode, header},
+	response::{Html, IntoResponse, Response},
+	routing::get,
+};
+
+pub fn build<S>() -> Router<()> { Router::new().route("/", get(index_handler)) }
+
+async fn index_handler() -> Result<impl IntoResponse, WebError> {
+	#[derive(Debug, Template)]
+	#[template(path = "index.html.j2")]
+	struct Tmpl<'a> {
+		nonce: &'a str,
+	}
+	let nonce = rand::random::<u64>().to_string();
+
+	let template = Tmpl { nonce: &nonce };
+	Ok((
+		[(header::CONTENT_SECURITY_POLICY, format!("default-src 'none' 'nonce-{nonce}';"))],
+		Html(template.render()?),
+	))
+}
+
+#[derive(Debug, thiserror::Error)]
+enum WebError {
+	#[error("Failed to render template: {0}")]
+	Render(#[from] askama::Error),
+}
+
+impl IntoResponse for WebError {
+	fn into_response(self) -> Response {
+		#[derive(Debug, Template)]
+		#[template(path = "error.html.j2")]
+		struct Tmpl<'a> {
+			nonce: &'a str,
+			err: WebError,
+		}
+
+		let nonce = rand::random::<u64>().to_string();
+
+		let status = match &self {
+			| Self::Render(_) => StatusCode::INTERNAL_SERVER_ERROR,
+		};
+		let tmpl = Tmpl { nonce: &nonce, err: self };
+		if let Ok(body) = tmpl.render() {
+			(
+				status,
+				[(
+					header::CONTENT_SECURITY_POLICY,
+					format!("default-src 'none' 'nonce-{nonce}';"),
+				)],
+				Html(body),
+			)
+				.into_response()
+		} else {
+			(status, "Something went wrong").into_response()
+		}
+	}
+}