diff --git a/KNOWN_ISSUES.md b/KNOWN_ISSUES.md
new file mode 100644
index 0000000..a673094
--- /dev/null
+++ b/KNOWN_ISSUES.md
@@ -0,0 +1,40 @@
+# 已知问题
+
+## 1. HTTP Keep-Alive 连接复用不支持
+
+**状态**: 等待 V 语言官方修复
+
+**问题描述**: 
+每次 HTTP 请求响应时间约 300ms，其中大部分时间消耗在 TCP 连接建立上。即使响应头中包含 `Connection: keep-alive`，连接也无法复用。
+
+**现象**:
+- 快速连续发送请求：每次都慢（~300ms）
+- 慢速发送请求：快慢交替（复用时快，超时后重建连接时慢）
+
+**根本原因**:
+V 语言标准库 `net.http.Server` 的 `handle_conn` 函数在每次请求处理完成后都会立即关闭连接：
+
+```v
+// F:\v\vlib\net\http\server.v
+fn (mut w HandlerWorker) handle_conn(mut conn net.TcpConn) {
+    defer {
+        conn.close() or { eprintln('close() failed: ${err}') }  // 每次请求后关闭连接
+    }
+    // ... 处理单个请求 ...
+}
+```
+
+**影响**:
+- 无法实现 HTTP/1.1 Keep-Alive 连接复用
+- 每次请求都需要重新建立 TCP 连接（三次握手）
+- 高并发场景下性能受限
+
+**临时解决方案**:
+- 在服务器前部署支持 Keep-Alive 的反向代理（如 nginx）
+- 或等待 V 语言官方修复此问题
+
+**跟踪**:
+- V 语言 GitHub: https://github.com/vlang/v
+- 相关文件: `vlib/net/http/server.v`
+
+**发现日期**: 2025-12-26
diff --git a/example.exe b/example.exe
index ff3d040..77e44d9 100644
Binary files a/example.exe and b/example.exe differ
diff --git a/hono/app.v b/hono/app.v
index 3519ac9..335c898 100644
--- a/hono/app.v
+++ b/hono/app.v
@@ -2,6 +2,7 @@ module hono
 
 import net.urllib
 import net.http
+import time
 
 // Context 路由器
 struct ContextRouter {
@@ -265,6 +266,9 @@ fn (mut s ServerHanler) exec_context_middlewares(idx int, mut ctx Context, handl
 pub fn (mut app Hono) listen(port string) {
 	app.server.addr = port
 	app.server.handler = server_hanler_new(app)
+	// 增加超时配置以支持更好的 Keep-Alive
+	app.server.read_timeout = 60 * time.second
+	app.server.write_timeout = 60 * time.second
 	app.server.listen_and_serve()
 }
 
diff --git a/hono/request.v b/hono/request.v
index 7d22243..c2eb2c3 100644
--- a/hono/request.v
+++ b/hono/request.v
@@ -42,6 +42,7 @@ pub fn Context.new(req http.Request, params map[string]string, query map[string]
 pub fn (mut c Context) json(data string) http.Response {
 	mut headers := http.new_header()
 	headers.add_custom('Content-Type', 'application/json; charset=utf-8') or { }
+	headers.add_custom('Connection', 'keep-alive') or { }
 	for key, value in c.headers {
 		headers.add_custom(key, value) or { continue }
 	}
@@ -55,6 +56,7 @@ pub fn (mut c Context) json(data string) http.Response {
 pub fn (mut c Context) text(data string) http.Response {
 	mut headers := http.new_header()
 	headers.add_custom('Content-Type', 'text/plain; charset=utf-8') or { }
+	headers.add_custom('Connection', 'keep-alive') or { }
 	for key, value in c.headers {
 		headers.add_custom(key, value) or { continue }
 	}
@@ -68,6 +70,7 @@ pub fn (mut c Context) text(data string) http.Response {
 pub fn (mut c Context) html(data string) http.Response {
 	mut headers := http.new_header()
 	headers.add_custom('Content-Type', 'text/html; charset=utf-8') or { }
+	headers.add_custom('Connection', 'keep-alive') or { }
 	for key, value in c.headers {
 		headers.add_custom(key, value) or { continue }
 	}
@@ -498,6 +501,7 @@ fn (mut c Context) stream_large_file(file_path string, file_size u64, options Fi
 // 构建带头部的响应
 fn (mut c Context) build_headers_response(body string) http.Response {
 	mut headers := http.new_header()
+	headers.add_custom('Connection', 'keep-alive') or { }
 	for key, value in c.headers {
 		headers.add_custom(key, value) or { continue }
 	}
diff --git a/hono/static.v b/hono/static.v
index d221aef..1645f54 100644
--- a/hono/static.v
+++ b/hono/static.v
@@ -55,17 +55,25 @@ pub fn serve_static(options StaticOptions) fn (mut Context, fn (mut Context) htt
 		println('  Root: ${options.root}')
 		
 		// 安全检查：防止路径遍历攻击
+		// 注意：不检查文件扩展名，因为这可能是 API 路由而不是静态文件
+		// 如果文件不存在，会在后面调用 next(mut c) 继续处理
 		validation_options := PathValidationOptions{
 			allow_absolute_paths: false
 			allow_hidden_files: options.dotfiles
-			check_file_extension: true
-			allowed_base_paths: [options.root]
+			check_file_extension: false  // 不检查扩展名，让文件存在性检查来决定
+			allowed_base_paths: []
 		}
 		
 		safe_file_path := validate_file_path(file_path, validation_options) or {
 			println('  [DEBUG] Path validation failed: $err')
-			c.status(403)
-			return c.text('Forbidden')
+			// 路径验证失败（如包含 .. 等危险模式），传递给下一个处理器
+			// 只有真正的安全问题才返回 403
+			if err.msg().contains('Dangerous') {
+				c.status(403)
+				return c.text('Forbidden')
+			}
+			// 其他情况（如无扩展名）传递给下一个处理器
+			return next(mut c)
 		}
 		
 		// 检查是否允许访问点文件
@@ -145,6 +153,7 @@ fn serve_file(mut c Context, file_path string, options StaticOptions) http.Respo
 			c.status(304)
 			// 构建响应头
 			mut headers := http.new_header()
+			headers.add_custom('Connection', 'keep-alive') or { }
 			for key, value in c.headers {
 				headers.add_custom(key, value) or { continue }
 			}
@@ -168,6 +177,9 @@ fn serve_file(mut c Context, file_path string, options StaticOptions) http.Respo
 		c.headers[key] = value
 	}
 	
+	// 设置 Keep-Alive
+	c.headers['Connection'] = 'keep-alive'
+	
 	// 返回文件内容
 	mut headers := http.new_header()
 	for key, value in c.headers {