在 CakePHP 2 中抛出自定义 503 异常-php问题

Throwing a custom 503 exception in CakePHP 2(在 CakePHP 2 中抛出自定义 503 异常)

本文介绍了在 CakePHP 2 中抛出自定义 503 异常的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我需要提供一个 503 Service Unavailable HTTP 标头.

I need to give a 503 Service Unavailable HTTP header.

通常我将这些用于 404 和 500 代码

Normally I use these for 404 and 500 codes

throw new NotFoundException();
throw new InternalErrorException();

但是我在 CakePHP 2.2 中找不到 503 的相关异常?

But I couldn't find relevant exception for 503 in CakePHP 2.2?

在我的app/lib/AppExceptionHandler.php"文件中，我有这个处理错误的类/函数.

In my "app/lib/AppExceptionHandler.php" file I have this class/function that handles errors.

class AppExceptionHandler {
    public static function handle($error) {
     }

在app/Lib"文件夹中，我创建了一个名为MyExceptions.php"的文件.我在这个文件中写了以下代码:

Inside "app/Lib" folder I created a file named "MyExceptions.php". I wrote the following code inside this file:

class ServiceUnavailableException extends CakeException {

protected $_messageTemplate = 'Service is not available now';

}

在bootstrap.php"中我这样写:

App::uses('MyExceptions', 'Lib');

然后在MyNewController.php"文件中我写了这个:

Then inside "MyNewController.php" file I wrote this:

throw new ServiceUnavailableException("just try");

throw new ServiceUnavailableException("just trying");

但是当我抛出这个异常时我得到这个错误:

But then I get this error when I throw this exception:

Fatal error: Class 'ServiceUnavailableException' not found in
 /var/www/vhosts/example.com/httpdocs/app/Controller/MyNewController.php
 on line 3560

Warning (2): Cannot modify header information - headers already sent by
(output started at 
/var/www/vhosts/example.com/httpdocs/app/Controller/MyNewController.php:3560)
[APP/Lib/AppExceptionHandler.php, line 19]

我想念什么?谢谢

推荐答案

Cake 2.0 书中的 Exceptions 页面值得一读.

这是我的简短测试:

// in bootstrap.php
require(APP . 'Lib' . DS . 'MyExceptions.php');


// in /Lib/MyExceptions.php
class ServiceUnavailableException extends CakeException {

    protected $_messageTemplate = 'Test';
}

// in controller
throw new ServiceUnavailableException('Service unavailable', 503);

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