嗨我正在使用以下软件包https://github.com/jayhealey/Robots为我的应用程序中的每个环境添加不同的robots.txt文件.然而,这是我在我的应用程序上使用的一种方法,即爬行延迟,即
Crawl-delay: 3600
现在我从这个包的composer安装中得到以下文件夹:
vendor/healey/robots/src/Healey/Robots/Robots.php,这样开始:
<?php namespace Healey\Robots;
class Robots
{....}
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现在我希望能够扩展这个类,这样我就可以成功地使用它中的方法,但显然不希望在vendor目录中添加该函数,因为这是不可取的.所以我创建了以下类:
应用程序/ LIB /助手/ AppRobots.php
这有以下内容:
<?php
use Healey\Robots\Robots;
class AppRobots extends Robots {
/**
* Add crawl Delay to robots.txt.
*
* @param string $delay
*/
public function crawlDelay($delay)
{
$this->addLine("Crawl-delay: $delay");
}
}
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现在在routes.php我有以下内容:
Route::get('robots.txt', function() {
// If on the live server, serve a nice, welcoming robots.txt.
if (App::environment() == 'production')
{
\Robots::addUserAgent('*');
\AppRobots::crawlDelay('3600');
} else {
// If you're on any other server, tell everyone to go away.
\Robots::addDisallow('*');
}
return Response::make(Robots::generate(), 200, array('Content-Type' => 'text/plain'));
});
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现在这会引发以下错误:
不应静态调用非静态方法AppRobots :: crawlDelay()
所以我把方法改为静态如下:
public static function crawlDelay($delay)
{
$this->addLine("Crawl-delay: $delay");
}
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但是,这会引发以下错误:
不在对象上下文中时使用$ this所以我更新了它以使用以下方法:
/**
* Add crawl Delay to robots.txt.
*
* @param string $delay
*/
public static function crawlDelay($delay)
{
$robots = new \Robots();
$robots->addLine("Crawl-delay: $delay");
}
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现在我明白了 Call to undefined method Healey\Robots\RobotsFacade::addLine()
这是RobotsFacade文件(vendor/healey/robots/src/Healey/Robots/RobotsFacade.php)
<?php namespace Healey\Robots;
use Illuminate\Support\Facades\Facade;
class RobotsFacade extends Facade
{
/**
* Get the registered name of the component.
*
* @return string
*/
protected static function getFacadeAccessor() { return 'robots'; }
}
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这是服务提供商(vendor/healey/robots/src/Healey/Robots/RobotsServiceProvider.php)
<?php namespace Healey\Robots;
use Illuminate\Support\ServiceProvider;
class RobotsServiceProvider extends ServiceProvider
{
/**
* Indicates if loading of the provider is deferred.
*
* @var bool
*/
protected $defer = false;
/**
* Bootstrap the application events.
*
* @return void
*/
public function boot()
{
$this->package('healey/robots');
}
/**
* Register the service provider.
*
* @return void
*/
public function register()
{
$this->app['robots'] = $this->app->share(function($app)
{
return new Robots();
});
$this->app->booting(function()
{
$loader = \Illuminate\Foundation\AliasLoader::getInstance();
$loader->alias('Robots', 'Healey\Robots\RobotsFacade');
});
}
}
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任何想法如何成功扩展这个类,以便我可以根据需要添加一个额外的方法?
应用程序/ LIB/CustomRobotsServiceProvider.php
<?php
namespace MyApp\Healey\Robots;
use Illuminate\Support\ServiceProvider;
class CustomRobotsServiceProvider extends ServiceProvider
{
public function boot()
{
}
public function register()
{
$this->app['robots'] = $this->app->share(function($app)
{
return new AppRobots();
});
}
}
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应用程序/ LIB /助手/ AppRobots.php
<?php
namespace MyApp\Healey\Robots;
use MyApp\Healey\Robots\CustomRobotsServiceProvider;
use Healey\Robots\Robots as Robots;
class AppRobots extends Robots {
/**
* Add crawl Delay to robots.txt.
*
* @param string $delay
*/
public static function crawlDelay($delay)
{
$robot = new Robots();
$robot->addLine("Crawl-delay: $delay");
}
}
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在provider数组中的app.php,我有以下内容:
'Healey\Robots\RobotsServiceProvider',
'MyApp\Healey\Robots\CustomRobotsServiceProvider'
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在别名数组中我有以下内容:
'Robots' => 'Healey\Robots\Robots',
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但是,这不是使用此方法添加Crawl Delay行:
\Robots::crawlDelay('3600');
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有什么想法为什么这条线没有被写入robots.txt路线?它正在达到方法,但没有成功添加此行.
您需要创建自己的服务提供商并覆盖"机器人"服务,以便它使用您的类,而不是基类.
创建服务提供商
use Illuminate\Support\ServiceProvider;
class CustomRobotsServiceProvider extends ServiceProvider
{
public function boot()
{
}
public function register()
{
$this->app['robots'] = $this->app->share(function($app)
{
return new AppRobots();
});
}
}
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'providers' => array(
... some other providers
'Your\Namespace\CustomRobotsServiceProvider'
),
Run Code Online (Sandbox Code Playgroud)确保您的提供商在RobotsServiceProvider之后注册,以便您的服务覆盖原始服务,反之亦然.
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