diff --git a/src/MiddlewareProxyGenerator.php b/src/MiddlewareProxyGenerator.php
new file mode 100644
index 0000000..d6bfb53
--- /dev/null
+++ b/src/MiddlewareProxyGenerator.php
@@ -0,0 +1,102 @@
+<?php
+
+use PhpParser\Error;
+use PhpParser\Node;
+use PhpParser\NodeDumper;
+use PhpParser\NodeFactory;
+use PhpParser\NodeTraverser;
+use PhpParser\NodeVisitorAbstract;
+use PhpParser\ParserFactory;
+use PhpParser\PrettyPrinter\Standard;
+use Psr\Http\Message\ResponseInterface;
+
+class MiddlewareProxyGenerator {
+    private static string $cacheFile = __DIR__ . '/middleware_proxy.php';
+    private static NodeFactory $factory;
+
+    public static function generateProxy(array $middlewares): string {
+        self::$factory = new NodeFactory();
+
+        // 创建类结构（v5.5.0兼容写法）
+        $class = new Node\Stmt\Class_(
+            'MiddlewareProxy',
+            [
+                'implements' => [new Node\Name\FullyQualified(\Psr\Http\Server\MiddlewareInterface::class)],
+                'stmts' => []
+            ]
+        );
+
+        // 生成中间件调用链
+        $method = self::createMethodNode($middlewares);
+        $class->stmts[] = $method;
+
+        // 生成代码
+        $printer = new Standard();
+        return $printer->prettyPrintFile([$class]);
+    }
+
+    private static function createMethodNode(array $middlewares): Node\Stmt\Function_ {
+        $method = new Node\Stmt\Function_(
+            'process',
+            [
+                'params' => [
+                    new Node\Param(
+                        new Node\Expr\Variable('request'),
+                        null,
+                        new Node\UnionType([new Node\Expr\Variable(\Psr\Http\Message\ServerRequestInterface::class)])
+                    ),
+                    new Node\Param(
+                        new Node\Expr\Variable('handler'),
+                        null,
+                        new Node\UnionType([new Node\Expr\Variable(\Psr\Http\Server\RequestHandlerInterface::class)])
+                    )
+                ],
+                'returnType' => new Node\Name(ResponseInterface::class),
+                'stmts' => []
+            ]
+        );
+
+        // 生成中间件调用链（v5.5.0闭包写法）
+        $chain = [];
+        $count = count($middlewares);
+        for ($i = 0; $i < $count; $i++) {
+            $className = $middlewares[$i]::class;
+            $chain[] = self::createMiddlewareCall($i, $className, $count);
+        }
+
+        $method->stmts = array_reverse($chain);
+        return $method;
+    }
+
+    private static function createMiddlewareCall(int $index, string $className, int $count): Node {
+        $mwVar = new Node\Expr\Variable("mw{$index}");
+        $nextHandler = new Node\Expr\Variable("next");
+
+        // 创建中间件实例（v5.5.0兼容）
+        $instanciate = new Node\Expr\New_($className);
+
+        // 创建闭包表达式（v5.5.0语法）
+        $closure = new Node\Expr\Closure([
+            'static' => true,
+            'params' => [new Node\Param($nextHandler)],
+            'stmts' => [
+                new Node\Stmt\Expression(
+                    new Node\Expr\MethodCall(
+                        $instanciate,
+                        'process',
+                        [new Node\Arg($nextHandler), new Node\Arg($mwVar)]
+                    )
+                )
+            ]
+        ]);
+
+        return new Node\Stmt\Expression($closure);
+    }
+}
+
+// 生成代理类代码
+$middlewares = [AuthMiddleware::class, LogMiddleware::class];
+$proxyCode = MiddlewareProxyGenerator::generateProxy($middlewares);
+
+// 写入代理类文件
+file_put_contents(MiddlewareProxyGenerator::$cacheFile, $proxyCode);
diff --git a/src/Validator/ValidatorMiddleware.php b/src/Validator/ValidatorMiddleware.php
index 848ef44..79df15b 100644
--- a/src/Validator/ValidatorMiddleware.php
+++ b/src/Validator/ValidatorMiddleware.php
@@ -39,7 +39,7 @@ class ValidatorMiddleware implements MiddlewareInterface
         if (!$validator->run($request)) {
             Kiri::getLogger()->println($request->getUri()->getPath() . ' `' . $validator->error() . '`');
 
-            return $this->response->html($validator->error(), 415);
+            return $this->response->html($validator->error(), 400);
         } else {
             return $handler->handle($request);
         }