vweb: fix index (#5682)

examples/vweb/vweb_assets/main.v

@@ -29,7 +29,7 @@ pub fn (mut app App) init_once() {
 
 pub fn (mut app App) init() {}
 
-fn (mut app App) index() {
+pub fn (mut app App) index() {
 	// We can dynamically specify which assets are to be used in template.
 	mut am := assets.new_manager()
 	am.add_css('assets/index.css')

vlib/vweb/vweb.v

@@ -346,6 +346,13 @@ fn handle_conn<T>(conn net.Socket, mut app T) {
 			// since such methods have a priority.
 			// For example URL `/register` matches route `/:user`, but `fn register()`
 			// should be called first.
+
+			if url_words.len == 0 {
+				app.index()
+				conn.close() or {}
+				return
+			}
+
 			println('no attrs for ${url_words[0]}')
 			if url_words[0] == method {
 				println('easy match $method')