Php Symfony 2如何通过访问请求对象动态添加路由

背景：

我正在尝试根据请求主机有条件地加载路由。我有一个数据库设置，其中有映射到模板的主机。如果用户来自主机

a

，并且使用了模板

TA

，我想加载该模板的路由。如果它们来自主机

B

，则加载该模板的路由（

TB

）

我必须这样做的原因是，每个模板将共享许多路由。但是，对于给定模板，存在一些独特的路由

将每个模板路由限制到给定的主机是可以的，但实际上有1000个主机

我尝试过的：

我已经尝试了一个自定义路由加载器，如以下文档所述：

但是，当我配置服务并尝试注入

“@request”

时，构造函数失败，因为$request为null

services:
    acme_demo.routing_loader:
        class: Acme\DemoBundle\Routing\ExtraLoader
        arguments: ["@request"]
        tags:
            - { name: routing.loader }

类别：

<?php
namespace: Acme\DemoBundle\Routing;
use Symfony\Component\HttpFoundation\Request;
class ExtraLoader
{
    protected $request;

    public function __construct(Request $request)
    {
        $this->request = $request;
    }
    // ...
}

我最接近实现这一目标的方法是遵循以下指南：

---

我在这方面遇到的问题是，我试图在控制器上使用

注释

，但我似乎无法使

Symfony\Component\Routing\Loader\AnnotationFileLoader

正常工作。

好的，我终于找到了一个可行的解决方案，它是上述几种指南的混合

Im使用内核请求侦听器：

services:
    website_listener:
        class: NameSpace\Bundle\EventListener\WebsiteListener
        arguments:
            - "@website_service"
            - "@template_service"
            - "@sensio_framework_extra.routing.loader.annot_dir"
            - "@router"
            - "%admin_domain%"
        tags:
            - { name: kernel.event_listener, event: kernel.request, method: onKernelRequest, priority: 33 }

听众：

<?php
namespace NameSpace\WebsiteBundle\EventListener;

use NameSpace\TemplateBundle\Service\TemplateService;
use NameSpace\WebsiteBundle\Service\WebsiteService;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\Routing\Loader\AnnotationDirectoryLoader;
use Symfony\Component\HttpKernel\EventListener\RouterListener;
use Symfony\Component\Routing\Matcher\UrlMatcher;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\Routing\RouteCollection;
use Symfony\Bundle\FrameworkBundle\Routing\Router;
use Symfony\Component\PropertyAccess\PropertyAccess;

class WebsiteListener
{

    /**
     * @var WebsiteService
     */
    protected $websiteService;

    /**
     * @var TemplateService
     */
    protected $templateService;

    /**
     * @var AnnotationDirectoryLoader
     */
    protected $loader;

    /**
     * @var Router
     */
    protected $router;

    /**
     * @var string
     */
    protected $adminDomain;

    public function __construct(WebsiteService $websiteService, TemplateService $templateService, AnnotationDirectoryLoader $loader, Router $router, $adminDomain)
    {
        $this->websiteService = $websiteService;
        $this->templateService = $templateService;
        $this->loader = $loader;
        $this->router = $router;
        $this->adminDomain = $adminDomain;
    }

    public function loadRoutes()
    {
        $template = $this->templateService->getTemplateByAlias($this->websiteService->getWebsite()->getTemplate());

        $routes = $this->loader->load($template['routes'],'annotation');
        $allRoutes = $this->router->getRouteCollection();
        $allRoutes->addCollection($routes);
    }

    public function onKernelRequest(GetResponseEvent $event)
    {
        try {
            $this->websiteService->handleRequest($event->getRequest());
            $this->loadRoutes();
        } catch(NotFoundHttpException $e) {
            if($event->getRequest()->getHost() !== $this->adminDomain){
                throw $e;
            }
        }

    }
}

<?php
namespace NameSpace\WebsiteBundle\EventListener;

use NameSpace\TemplateBundle\Service\TemplateService;
use NameSpace\WebsiteBundle\Service\WebsiteService;
use Symfony\Component\HttpKernel\Event\GetResponseEvent;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
use Symfony\Component\Routing\Loader\AnnotationDirectoryLoader;
use Symfony\Component\HttpKernel\EventListener\RouterListener;
use Symfony\Component\Routing\Matcher\UrlMatcher;
use Symfony\Component\Routing\RequestContext;
use Symfony\Component\Routing\RouteCollection;
use Symfony\Bundle\FrameworkBundle\Routing\Router;
use Symfony\Component\PropertyAccess\PropertyAccess;

class WebsiteListener
{

    /**
     * @var WebsiteService
     */
    protected $websiteService;

    /**
     * @var TemplateService
     */
    protected $templateService;

    /**
     * @var AnnotationDirectoryLoader
     */
    protected $loader;

    /**
     * @var Router
     */
    protected $router;

    /**
     * @var string
     */
    protected $adminDomain;

    public function __construct(WebsiteService $websiteService, TemplateService $templateService, AnnotationDirectoryLoader $loader, Router $router, $adminDomain)
    {
        $this->websiteService = $websiteService;
        $this->templateService = $templateService;
        $this->loader = $loader;
        $this->router = $router;
        $this->adminDomain = $adminDomain;
    }

    public function loadRoutes()
    {
        $template = $this->templateService->getTemplateByAlias($this->websiteService->getWebsite()->getTemplate());

        $routes = $this->loader->load($template['routes'],'annotation');
        $allRoutes = $this->router->getRouteCollection();
        $allRoutes->addCollection($routes);
    }

    public function onKernelRequest(GetResponseEvent $event)
    {
        try {
            $this->websiteService->handleRequest($event->getRequest());
            $this->loadRoutes();
        } catch(NotFoundHttpException $e) {
            if($event->getRequest()->getHost() !== $this->adminDomain){
                throw $e;
            }
        }

    }
}