split s2s into units

Signed-off-by: Jason Volk <jason@zemos.net>

src/api/server/well_known.rs

@@ -0,0 +1,17 @@
+use ruma::api::{client::error::ErrorKind, federation::discovery::discover_homeserver};
+
+use crate::{services, Error, Result, Ruma};
+
+/// # `GET /.well-known/matrix/server`
+///
+/// Returns the .well-known URL if it is configured, otherwise returns 404.
+pub(crate) async fn well_known_server(
+	_body: Ruma<discover_homeserver::Request>,
+) -> Result<discover_homeserver::Response> {
+	Ok(discover_homeserver::Response {
+		server: match services().globals.well_known_server() {
+			Some(server_name) => server_name.to_owned(),
+			None => return Err(Error::BadRequest(ErrorKind::NotFound, "Not found.")),
+		},
+	})
+}