Question

Slim framework我遇到此问题。我有类模板有渲染方法，我希望Slim在路由处理程序返回时呈现此类的对象

$app->get('/test', function() {
    return new Template('main', function() use ($error) {
        return array(
            'content' => "Hello"
        );
    });
});

它工作我创建了子类（在System.php中）

class System extends Slim {
   function __constructor() {
       Slim::__construct();
   }
   private function auto_render_fun($callable) {
        $app = $this;
        return function() use ($callable, $app) {
            $args = func_get_args();
            $ret = call_user_func_array($callable, $args);
            if ($ret instanceof Template) {
                //render Template - Slim ignore return value
                $app->response()->body($ret->render());
            }
        };
    }
    protected function mapRoute($args) {
        $last = count($args)-1;
        $args[$last] = $this->auto_render_fun($args[$last]);
        return Slim::mapRoute($args);
    }
}

我想用notFound

做同样的事情

$app->notFound(function () use ($app) {
    $response = $app->response();
    $response['Content-Type'] = 'text/html';
    return new Template('main', function() {
        return array('content' => new Template('error_404', null));
    });
});

所以我覆盖了notFound函数来包装Closure并渲染它的返回值

首先我尝试使用较小的代码

public function notFound($callable = null) {
    if (!is_null(($callable))) {
        $this->router->notFound($this->auto_render_fun($callable));
    } else {
        Slim::notFound();
    }
}

我也尝试这个（复制和修改旧代码）。

public function notFound($callable = null) {
    if ( !is_null($callable) ) {
        $this->router->notFound($this->auto_render_fun($callable));
        //            $this->router->notFound($callable);    // old line
    } else {
        ob_start();
        $customNotFoundHandler = $this->router->notFound();
        if ( is_callable($customNotFoundHandler) ) {
            call_user_func($customNotFoundHandler);
        } else {
            call_user_func(array($this, 'defaultNotFound'));
        }
        $this->halt(404, ob_get_clean());
    }
}

但它之所以不起作用的原因是它的trow Slim_Exception_Stop假设被Slim缓存在这里就是调用$this->notFound();的代码行 https://github.com/codeguy/Slim/blob/master/Slim/Slim.php#L1160 它在try..catch里面。

这是堆栈跟踪（我在notFound函数中缓存它 - 但它应该在Slim类中处理）。

Slim_Exception_Stop in file libs/Slim/Slim/Slim.php at 862
0: Slim->stop() in libs/Slim/Slim/Slim.php at 882
1: Slim->halt(integer, string) in libs/System.php at 187
2: System->notFound() in libs/Slim/Slim/Slim.php at 1161
3: Slim->call() in libs/Slim/Slim/Middleware/Flash.php at 84
4: Slim_Middleware_Flash->call() in libs/Slim/Slim/Middleware/MethodOverride.php at 91
5: Slim_Middleware_MethodOverride->call() in libs/Slim/Slim/Middleware/PrettyExceptions.php at 65
6: Slim_Middleware_PrettyExceptions->call() in libs/Slim/Slim/Middleware/PrettyExceptions.php at 65
7: Slim_Middleware_PrettyExceptions->call() in libs/Slim/Slim/Slim.php at 1098
8: Slim->run() in index.php at 573

Answer 1

好的，我找到了原因，异常被处理了，但没有内容。我错误地认为它是Classes的东西，但只是Slim代码有bug。

public function halt( $status, $message = '' ) {
    $this->cleanBuffer();
    $this->response->status($status);
    $this->response->body($message);
    $this->stop();
}

函数覆盖您在处理程序中使用的数据，如

$app->notFound(function() {
   $app->response()->body('Error');
});

不起作用，找不到的功能应该是这样的

public function notFound($callable = null) {
    if (!is_null(($callable))) {
        $this->router->notFound($this->auto_render_fun($callable));
    } else {
        $customNotFoundHandler = $this->router->notFound();
        if (is_callable($customNotFoundHandler)) {
            call_user_func($customNotFoundHandler);
        } else {
            call_user_func(array($this, 'defaultNotFound'));
        }
        $this->response->status(404);
        $this->stop();
    }
}

父类不会从子类中的覆盖方法中捕获异常

1 个答案: