much better(ish)

src/main.zig

@@ -18,8 +18,7 @@ pub fn main() !void {
     var listener = Listener.init(.{
         .address = address,
         .allocator = allocator,
-        // .handler = router.handle,
-        .handler = &handle,
+        .root_handler = &handle,
     });
     defer listener.deinit();
     try listener.listen();
@@ -36,23 +35,25 @@ pub fn handleError(event: *Listener.Event) anyerror!void {
 pub const Listener = struct {
     address: net.Address,
     arena: heap.ArenaAllocator,
-    handlerFn: HandlerFn,
+
+    router: Router,
 
     pub const Options = struct {
         address: net.Address,
         allocator: mem.Allocator,
-        handler: HandlerFn,
+        root_handler: HandlerFn,
     };
 
     pub fn init(options: Options) Listener {
         return .{
             .address = options.address,
             .arena = heap.ArenaAllocator.init(options.allocator),
-            .handlerFn = options.handler,
+            .router = Router.init(options.allocator, options.root_handler),
         };
     }
 
     pub fn deinit(self: *Listener) void {
+        self.router.deinit();
         self.arena.deinit();
     }
 
@@ -89,7 +90,7 @@ pub const Listener = struct {
             var header_it = req.iterateHeaders();
             while (header_it.next()) |header| try event.req.headers.append(&header);
 
-            try self.handlerFn(&event);
+            try self.router.handle(&event);
 
             try self.respondFromEvent(&event, &req);
         }
@@ -131,9 +132,7 @@ pub const Listener = struct {
         root_node: Node,
         static_routes: std.StringHashMap(*Node),
 
-        error_handler: HandlerFn,
-
-        pub fn init(allocator: mem.Allocator, root_handler: HandlerFn, error_handler: HandlerFn) Router {
+        pub fn init(allocator: mem.Allocator, root_handler: HandlerFn) Router {
             return .{
                 .allocator = allocator,
                 .root_node = .{
@@ -144,16 +143,18 @@ pub const Listener = struct {
                     .placeholder_children = std.ArrayList(*Node).init(allocator),
                 },
                 .static_routes = std.StringHashMap(*Node).init(allocator),
-                .error_handler = error_handler,
             };
         }
 
         pub fn deinit(self: *Router) void {
+            self.root_node.children.deinit();
+            self.root_node.placeholder_children.deinit();
             self.static_routes.deinit();
         }
 
-        pub fn handle(self: *Router, event: *Listener.Event) anyerror!void {
-            try self.route(event.req.uri.path)(self, event);
+        pub fn handle(self: *Router, event: *Listener.Event) !void {
+            const handlerFn = self.route(event.req.uri.path);
+            try handlerFn(event);
         }
 
         pub fn addRoute(self: *Router, path: []const u8, handler: HandlerFn) !void {
@@ -173,7 +174,7 @@ pub const Listener = struct {
         pub fn route(self: *Router, path: []const u8) HandlerFn {
             if (self.static_routes.get(path)) |rt| return rt.handler;
             if (self.root_node.wildcard_child_node) |node| return node.handler;
-            return self.error_handler;
+            return self.root_node.handler;
         }
 
         pub const Node = struct {