diff --git a/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md b/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
index 98966a5a18..686d3c2ecb 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
+++ b/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
@@ -6,7 +6,7 @@ CHANGELOG
 
  * Added link to source for controllers registered as named services
  * Added link to source on controller on `router:match`/`debug:router` (when `framework.ide` is configured)
- * Added the `framework.router.context` configuration node to configure the `RequestContext`
+ * Added the `framework.router.default_uri` configuration option to configure the default `RequestContext`
  * Made `MicroKernelTrait::configureContainer()` compatible with `ContainerConfigurator`
  * Added a new `mailer.message_bus` option to configure or disable the message bus to use to send mails.
  * Added flex-compatible default implementations for `MicroKernelTrait::registerBundles()` and `getProjectDir()`
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
index 7caec9b49f..eab898b882 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Configuration.php
@@ -470,6 +470,10 @@ class Configuration implements ConfigurationInterface
                     ->children()
                         ->scalarNode('resource')->isRequired()->end()
                         ->scalarNode('type')->end()
+                        ->scalarNode('default_uri')
+                            ->info('The default URI used to generate URLs in a non-HTTP context')
+                            ->defaultNull()
+                        ->end()
                         ->scalarNode('http_port')->defaultValue(80)->end()
                         ->scalarNode('https_port')->defaultValue(443)->end()
                         ->scalarNode('strict_requirements')
@@ -482,15 +486,6 @@ class Configuration implements ConfigurationInterface
                             ->defaultTrue()
                         ->end()
                         ->booleanNode('utf8')->defaultNull()->end()
-                        ->arrayNode('context')
-                            ->info('The request context used to generate URLs in a non-HTTP context')
-                            ->addDefaultsIfNotSet()
-                            ->children()
-                                ->scalarNode('host')->defaultValue('%router.request_context.host%')->end()
-                                ->scalarNode('scheme')->defaultValue('%router.request_context.scheme%')->end()
-                                ->scalarNode('base_url')->defaultValue('%router.request_context.base_url%')->end()
-                            ->end()
-                        ->end()
                     ->end()
                 ->end()
             ->end()
diff --git a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
index 5ad7341279..666797f203 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/FrameworkExtension.php
@@ -899,10 +899,10 @@ class FrameworkExtension extends Extension
         $container->setParameter('request_listener.http_port', $config['http_port']);
         $container->setParameter('request_listener.https_port', $config['https_port']);
 
-        $requestContext = $container->getDefinition('router.request_context');
-        $requestContext->replaceArgument(0, $config['context']['base_url']);
-        $requestContext->replaceArgument(2, $config['context']['host']);
-        $requestContext->replaceArgument(3, $config['context']['scheme']);
+        if (null !== $config['default_uri']) {
+            $container->getDefinition('router.request_context')
+                ->replaceArgument(0, $config['default_uri']);
+        }
 
         if ($this->annotationsConfigEnabled) {
             $container->register('routing.loader.annotation', AnnotatedRouteControllerLoader::class)
diff --git a/src/Symfony/Bundle/FrameworkBundle/Resources/config/routing.xml b/src/Symfony/Bundle/FrameworkBundle/Resources/config/routing.xml
index cf662e2748..669b27d72c 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Resources/config/routing.xml
+++ b/src/Symfony/Bundle/FrameworkBundle/Resources/config/routing.xml
@@ -80,10 +80,10 @@
         <service id="Symfony\Component\Routing\RequestContextAwareInterface" alias="router" />
 
         <service id="router.request_context" class="Symfony\Component\Routing\RequestContext">
-            <argument></argument> <!-- base_url -->
-            <argument>GET</argument>
-            <argument></argument> <!-- host -->
-            <argument></argument> <!-- scheme -->
+            <factory class="Symfony\Component\Routing\RequestContext" method="fromUri" />
+            <argument>%router.request_context.base_url%</argument>
+            <argument>%router.request_context.host%</argument>
+            <argument>%router.request_context.scheme%</argument>
             <argument>%request_listener.http_port%</argument>
             <argument>%request_listener.https_port%</argument>
             <call method="setParameter">
@@ -117,8 +117,8 @@
 
         <service id="Symfony\Bundle\FrameworkBundle\Controller\RedirectController" public="true">
             <argument type="service" id="router" />
-            <argument>%request_listener.http_port%</argument>
-            <argument>%request_listener.https_port%</argument>
+            <argument type="service"><service class="int"><factory service="router.request_context" method="getHttpPort" /></service></argument>
+            <argument type="service"><service class="int"><factory service="router.request_context" method="getHttpsPort" /></service></argument>
         </service>
 
         <service id="Symfony\Bundle\FrameworkBundle\Controller\TemplateController" public="true">
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
index fad9b09a04..3ba4c3ecfe 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/DependencyInjection/ConfigurationTest.php
@@ -410,15 +410,11 @@ class ConfigurationTest extends TestCase
             ],
             'router' => [
                 'enabled' => false,
+                'default_uri' => null,
                 'http_port' => 80,
                 'https_port' => 443,
                 'strict_requirements' => true,
                 'utf8' => null,
-                'context' => [
-                    'host' => '%router.request_context.host%',
-                    'scheme' => '%router.request_context.scheme%',
-                    'base_url' => '%router.request_context.base_url%',
-                ],
             ],
             'session' => [
                 'enabled' => false,
diff --git a/src/Symfony/Bundle/SecurityBundle/Resources/config/security_listeners.xml b/src/Symfony/Bundle/SecurityBundle/Resources/config/security_listeners.xml
index 8b14cfd9e0..10b503b6bf 100644
--- a/src/Symfony/Bundle/SecurityBundle/Resources/config/security_listeners.xml
+++ b/src/Symfony/Bundle/SecurityBundle/Resources/config/security_listeners.xml
@@ -20,8 +20,8 @@
         </service>
 
         <service id="security.authentication.retry_entry_point" class="Symfony\Component\Security\Http\EntryPoint\RetryAuthenticationEntryPoint">
-            <argument>%request_listener.http_port%</argument>
-            <argument>%request_listener.https_port%</argument>
+            <argument type="service"><service class="int"><factory service="router.request_context" method="getHttpPort" /></service></argument>
+            <argument type="service"><service class="int"><factory service="router.request_context" method="getHttpsPort" /></service></argument>
         </service>
 
         <service id="security.authentication.basic_entry_point" class="Symfony\Component\Security\Http\EntryPoint\BasicAuthenticationEntryPoint" />
diff --git a/src/Symfony/Component/Routing/CHANGELOG.md b/src/Symfony/Component/Routing/CHANGELOG.md
index 267372eb82..d14549b522 100644
--- a/src/Symfony/Component/Routing/CHANGELOG.md
+++ b/src/Symfony/Component/Routing/CHANGELOG.md
@@ -12,6 +12,7 @@ CHANGELOG
  * added `ExpressionLanguageProvider` to expose extra functions to route conditions
  * added support for a `stateless` keyword for configuring route stateless in PHP, YAML and XML configurations.
  * added the "hosts" option to be able to configure the host per locale.
+ * added `RequestContext::fromUri()` to ease building the default context
 
 5.0.0
 -----
diff --git a/src/Symfony/Component/Routing/RequestContext.php b/src/Symfony/Component/Routing/RequestContext.php
index cb655f4485..17fc021c3c 100644
--- a/src/Symfony/Component/Routing/RequestContext.php
+++ b/src/Symfony/Component/Routing/RequestContext.php
@@ -45,6 +45,23 @@ class RequestContext
         $this->setQueryString($queryString);
     }
 
+    public static function fromUri(string $uri, string $host = 'localhost', string $scheme = 'http', int $httpPort = 80, int $httpsPort = 443): self
+    {
+        $uri = parse_url($uri);
+        $scheme = $uri['scheme'] ?? $scheme;
+        $host = $uri['host'] ?? $host;
+
+        if (isset($uri['port'])) {
+            if ('http' === $scheme) {
+                $httpPort = $uri['port'];
+            } elseif ('https' === $scheme) {
+                $httpsPort = $uri['port'];
+            }
+        }
+
+        return new self($uri['path'] ?? '', 'GET', $host, $scheme, $httpPort, $httpsPort);
+    }
+
     /**
      * Updates the RequestContext information based on a HttpFoundation Request.
      *