much much better(ish)

src/main.zig

@@ -21,6 +21,9 @@ pub fn main() !void {
         .root_handler = &handle,
     });
     defer listener.deinit();
+
+    try listener.router.addRoute("/error", &handleError);
+
     try listener.listen();
 }
 
@@ -34,7 +37,7 @@ pub fn handleError(event: *Listener.Event) anyerror!void {
 
 pub const Listener = struct {
     address: net.Address,
-    arena: heap.ArenaAllocator,
+    allocator: mem.Allocator,
 
     router: Router,
 
@@ -47,43 +50,45 @@ pub const Listener = struct {
     pub fn init(options: Options) Listener {
         return .{
             .address = options.address,
-            .arena = heap.ArenaAllocator.init(options.allocator),
+            .allocator = options.allocator,
             .router = Router.init(options.allocator, options.root_handler),
         };
     }
 
     pub fn deinit(self: *Listener) void {
         self.router.deinit();
-        self.arena.deinit();
     }
 
     pub fn listen(self: *Listener) !void {
-        var tcp = try self.address.listen(.{});
+        var arena = heap.ArenaAllocator.init(self.allocator);
+        defer arena.deinit();
+
+        var tcp = try self.address.listen(.{ .reuse_address = true });
         defer tcp.deinit();
         std.debug.print("listening at: {any}\n", .{self.address});
 
         while (true) {
-            const read_buf = try self.arena.allocator().alloc(u8, 1024 * 32);
+            const read_buf = try arena.allocator().alloc(u8, 1024 * 32);
             const connection = try tcp.accept();
             var server = http.Server.init(connection, read_buf);
-            try self.handle(&server);
-            _ = self.arena.reset(.retain_capacity);
+            try self.handle(&server, arena.allocator());
+            _ = arena.reset(.retain_capacity);
         }
     }
 
-    fn handle(self: *Listener, server: *http.Server) !void {
+    fn handle(self: *Listener, server: *http.Server, allocator: mem.Allocator) !void {
         handler: while (true) {
             var req = server.receiveHead() catch |e| if (e == error.HttpConnectionClosing) break :handler else return e;
 
             var event = Event{
                 .req = .{
                     .uri = try std.Uri.parseWithoutScheme(req.head.target),
-                    .headers = std.ArrayList(*const http.Header).init(self.arena.allocator()),
+                    .headers = std.ArrayList(*const http.Header).init(allocator),
                 },
                 .res = .{
                     .status = .ok,
-                    .headers = std.StringHashMap(*http.Header).init(self.arena.allocator()),
-                    .body = std.ArrayList(u8).init(self.arena.allocator()),
+                    .headers = std.StringHashMap(*http.Header).init(allocator),
+                    .body = std.ArrayList(u8).init(allocator),
                 },
             };
 
@@ -92,13 +97,13 @@ pub const Listener = struct {
 
             try self.router.handle(&event);
 
-            try self.respondFromEvent(&event, &req);
+            try respondFromEvent(&event, &req, allocator);
         }
     }
 
-    fn respondFromEvent(self: *Listener, event: *Event, req: *http.Server.Request) !void {
+    fn respondFromEvent(event: *Event, req: *http.Server.Request, allocator: mem.Allocator) !void {
         const res_body = try event.res.body.toOwnedSlice();
-        const res_headers = try self.arena.allocator().alloc(http.Header, event.res.headers.count());
+        const res_headers = try allocator.alloc(http.Header, event.res.headers.count());
         var i: usize = 0;
         var header_it = event.res.headers.iterator();
         while (header_it.next()) |header_ptr| : (i += 1) res_headers[i] = header_ptr.value_ptr.*.*;
@@ -137,7 +142,7 @@ pub const Listener = struct {
                 .allocator = allocator,
                 .root_node = .{
                     .type = .normal,
-                    .max_depth = 64,
+                    .max_depth = 1024,
                     .children = std.StringHashMap(*Node).init(allocator),
                     .handler = root_handler,
                     .placeholder_children = std.ArrayList(*Node).init(allocator),
@@ -162,15 +167,13 @@ pub const Listener = struct {
         }
 
         fn addStaticRoute(self: *Router, path: []const u8, handler: HandlerFn) !void {
-            try self.static_routes.put(path, .{
-                .type = .normal,
-                .max_depth = 1,
-                .children = std.StringHashMap(*Node).init(self.allocator),
-                .handler = handler,
-                .placeholder_children = std.ArrayList(*Node).init(self.allocator),
-            });
+            const node = try Node.init(self.allocator);
+            node.handler = handler;
+            try self.static_routes.put(path, node);
         }
 
+        // fn addNode(self: *Router, path: []const u8) !void {}
+
         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;
@@ -187,6 +190,21 @@ pub const Listener = struct {
             placeholder_children: std.ArrayList(*Node),
 
             pub const Type = enum { normal, wildcard, placeholder };
+
+            pub fn init(allocator: mem.Allocator) !*Node {
+                var self = try allocator.create(Node);
+                self.type = .normal;
+                self.max_depth = 256;
+                self.children = std.StringHashMap(*Node).init(allocator);
+                self.placeholder_children = std.ArrayList(*Node).init(allocator);
+                return self;
+            }
+
+            pub fn deinit(self: *Node, allocator: mem.Allocator) void {
+                self.placeholder_children.deinit();
+                self.children.deinit();
+                allocator.destroy(self);
+            }
         };
     };
 };