如何在Symfony2中使路由不区分大小写？ [英] How can I make routing case insensitive in Symfony2?

问题描述

Symfony2中是否有任何允许使用大小写不敏感路由的配置？

Is there any configuration in Symfony2 that allow use of case Insensitive routing?

例如，以下路由应按原样对待相同：

For example, routes below should be treated as they are the same:

www.exmaple.com/all 
www.exmaple.com/ALL

有一个对此提出了要求，但没有提及如何实现。

There is a pull request about this, but no reference how to make it happen.

推荐答案

我发现了一个在纯symfony中完成此操作的一种巧妙方法（无需apache mod_rewrite），而不必为每条路由创建不区分大小写的转发规则。

I found a nifty way to do this in pure symfony (no apache mod_rewrite) without having to create a case-insensitive forwarding rule for every route.

这利用了枝条ExceptionController。由于这种情况是在路由匹配失败（或出于其他原因引发404异常）之后发生的，因此不会破坏任何使用大写字母的现有路由网址（尽管这仍然是一个坏主意）。

This utilizes the twig ExceptionController. Because this occures after the routing has failed to match (or a 404 exception has been thrown for some other reason) it won't break any existing routing urls that use capitals (though that would still be a bad idea).

namespace Application\Symfony\TwigBundle\Controller;

use Symfony\Component\HttpKernel\Exception\FlattenException;
use Symfony\Component\HttpKernel\Log\DebugLoggerInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Bundle\TwigBundle\Controller\ExceptionController as BaseExceptionController;

/**
 * ExceptionController.
 */
class ExceptionController extends BaseExceptionController
{


    /**
     * Redirects 404s on urls with uppercase letters to the lowercase verion,
     * then uses it's parent class to
     * Convert an Exception to a Response.
     *
     * @param Request              $request   The request
     * @param FlattenException     $exception A FlattenException instance
     * @param DebugLoggerInterface $logger    A DebugLoggerInterface instance
     *
     * @return Response
     *
     * @throws \InvalidArgumentException When the exception template does not exist
     */
    public function showAction(Request $request, FlattenException $exception, DebugLoggerInterface $logger = null)
    {
        if ( (string) $exception->getStatusCode() === '404' && preg_match('/[A-Z]/', $request->getPathInfo())) {
            $lowercaseUrl = strtolower($request->getPathInfo());
            if ($request->isMethod('POST')) {
                return new RedirectResponse(
                    $lowercaseUrl,
                    '307'//307 status code preserves post information.
                );
            }
            $queryString = $request->getQueryString();
            return new RedirectResponse(
                $lowercaseUrl.( strlen($queryString)>0 ? '?'.$queryString : '' ),
                '301'//301 status code plays nice with search engines
                );
        }
        return parent::showAction($request, $exception, $logger);
    }
}

唯一的窍门是您需要配置此控制器即服务，您可以将正确的参数注入到父类的构造函数中：

The only other trick is that you need to configure this controller as a service you can inject the correct arguments into the parent class's constructor:

在services.yml

in services.yml

services:
    application.custom.exception_controller:
        class: Application\Symfony\TwigBundle\Controller\ExceptionController
        arguments: [ "@twig", "%kernel.debug%" ]

在config.yml中：

in config.yml:

twig:
    exception_controller: application.custom.exception_controller:showAction

当然，您可以将此控制器和服务定义放在任何地方

Of course, you can stick this controller and service definition anywhere

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