Locale switching when there are 2 or more different hosts

[vityachis]

Environment

Sonata packages

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$ composer show --latest 'sonata-project/*'
Direct dependencies required in composer.json:
sonata-project/admin-bundle              4.34.0 4.34.0 The missing Symfony Admin Generator
sonata-project/block-bundle              5.1.1  5.1.1  Symfony SonataBlockBundle
sonata-project/cache                     2.2.0  2.2.0  Cache library
Package sonata-project/cache is abandoned, you should avoid using it. No replacement was suggested.
sonata-project/cache-bundle              3.4.0  3.4.0  This bundle provides caching services
Package sonata-project/cache-bundle is abandoned, you should avoid using it. No replacement was suggested.
sonata-project/classification-bundle     4.9.1  4.9.1  Symfony SonataClassificationBundle
sonata-project/datagrid-bundle           3.5.0  3.5.0  Symfony SonataDatagridBundle
Package sonata-project/datagrid-bundle is abandoned, you should avoid using it. No replacement was suggested.
sonata-project/doctrine-extensions       2.4.1  2.4.1  Doctrine2 behavioral extensions
sonata-project/doctrine-orm-admin-bundle 4.17.1 4.17.1 Integrate Doctrine ORM into the SonataAdminBundle
sonata-project/entity-audit-bundle       1.18.0 1.18.0 Audit for Doctrine Entities
sonata-project/exporter                  3.3.0  3.3.0  Lightweight Exporter library
sonata-project/formatter-bundle          5.4.1  5.4.1  Symfony SonataFormatterBundle
sonata-project/intl-bundle               3.2.0  3.2.0  Symfony SonataIntlBundle
sonata-project/media-bundle              4.15.0 4.15.0 Symfony SonataMediaBundle
sonata-project/page-bundle               4.8.0  4.8.0  This bundle provides a Site and Page management through container and block services
sonata-project/seo-bundle                3.8.0  3.8.0  Symfony SonataSeoBundle
sonata-project/translation-bundle        3.3.0  3.3.0  SonataTranslationBundle
sonata-project/user-bundle               5.14.0 5.14.0 Symfony SonataUserBundle

Transitive dependencies not required in composer.json:
sonata-project/form-extensions           2.4.0  2.4.0  Symfony form extensions
sonata-project/twig-extensions           2.5.0  2.5.0  Sonata twig extensions

Symfony packages

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$ composer show --latest 'symfony/*'
Direct dependencies required in composer.json:
symfony/asset                      6.4.13 7.2.0  Manages URL generation and versioning of web assets such as CSS stylesheets, JavaScript files and image files
symfony/asset-mapper               6.4.16 7.2.0  Maps directories of assets & makes them available in a public directory with versioned filenames.
symfony/browser-kit                6.4.13 7.2.0  Simulates the behavior of a web browser, allowing you to make requests, click on links and submit forms programmatically
symfony/console                    6.4.15 7.2.1  Eases the creation of beautiful and testable command line interfaces
symfony/css-selector               6.4.13 7.2.0  Converts CSS selectors to XPath expressions
symfony/debug-bundle               6.4.13 7.2.0  Provides a tight integration of the Symfony VarDumper component and the ServerLogCommand from MonologBridge into the Symfony full-st...
symfony/doctrine-messenger         6.4.13 7.2.0  Symfony Doctrine Messenger Bridge
symfony/dotenv                     6.4.16 7.2.0  Registers environment variables from a .env file
symfony/expression-language        6.4.13 7.2.0  Provides an engine that can compile and evaluate expressions
symfony/flex                       2.4.7  2.4.7  Composer plugin for Symfony
symfony/form                       6.4.13 7.2.0  Allows to easily create, process and reuse HTML forms
symfony/framework-bundle           6.4.13 7.2.1  Provides a tight integration between Symfony components and the Symfony full-stack framework
symfony/http-client                6.4.16 7.2.1  Provides powerful methods to fetch HTTP resources synchronously or asynchronously
symfony/intl                       6.4.15 7.2.0  Provides access to the localization data of the ICU library
symfony/mailer                     6.4.13 7.2.0  Helps sending emails
symfony/maker-bundle               1.61.0 1.61.0 Symfony Maker helps you create empty commands, controllers, form classes, tests and more so you can forget about writing boilerplate...
symfony/mime                       6.4.13 7.2.1  Allows manipulating MIME messages
symfony/monolog-bundle             3.10.0 3.10.0 Symfony MonologBundle
symfony/notifier                   6.4.13 7.2.0  Sends notifications via one or more channels (email, SMS, ...)
symfony/phpunit-bridge             7.2.0  7.2.0  Provides utilities for PHPUnit, especially user deprecation notices management
symfony/polyfill-apcu              1.31.0 1.31.0 Symfony polyfill backporting apcu_* functions to lower PHP versions
symfony/process                    6.4.15 7.2.0  Executes commands in sub-processes
symfony/property-access            6.4.13 7.2.0  Provides functions to read and write from/to an object or array using a simple string notation
symfony/property-info              6.4.16 7.2.1  Extracts information about PHP class' properties using metadata of popular sources
symfony/runtime                    6.4.14 7.2.0  Enables decoupling PHP applications from global state
symfony/security-bundle            6.4.13 7.2.0  Provides a tight integration of the Security component into the Symfony full-stack framework
symfony/serializer                 6.4.15 7.2.0  Handles serializing and deserializing data structures, including object graphs, into array structures or other formats like XML and ...
symfony/stopwatch                  6.4.13 7.2.0  Provides a way to profile code
symfony/string                     6.4.15 7.2.0  Provides an object-oriented API to strings and deals with bytes, UTF-8 code points and grapheme clusters in a unified way
symfony/translation                6.4.13 7.2.0  Provides tools to internationalize your application
symfony/translation-contracts      2.5.4  3.5.1  Generic abstractions related to translation
symfony/twig-bridge                6.4.16 7.2.1  Provides integration for Twig with various Symfony components
symfony/twig-bundle                6.4.13 7.2.0  Provides a tight integration of Twig into the Symfony full-stack framework
symfony/validator                  6.4.16 7.2.0  Provides tools to validate values
symfony/web-link                   6.4.13 7.2.0  Manages links between resources
symfony/web-profiler-bundle        6.4.16 7.2.0  Provides a development tool that gives detailed information about the execution of any request
symfony/webpack-encore-bundle      1.17.2 2.2.0  Integration with your Symfony app & Webpack Encore!
symfony/yaml                       6.4.13 7.2.0  Loads and dumps YAML files

Transitive dependencies not required in composer.json:
symfony/cache                      6.4.16 7.2.1  Provides extended PSR-6, PSR-16 (and tags) implementations
symfony/cache-contracts            3.5.1  3.5.1  Generic abstractions related to caching
symfony/clock                      6.4.13 7.2.0  Decouples applications from the system clock
symfony/config                     6.4.14 7.2.0  Helps you find, load, combine, autofill and validate configuration values of any kind
symfony/dependency-injection       6.4.16 7.2.0  Allows you to standardize and centralize the way objects are constructed in your application
symfony/deprecation-contracts      3.5.1  3.5.1  A generic function and convention to trigger deprecation notices
symfony/doctrine-bridge            6.4.16 7.2.1  Provides integration for Doctrine with various Symfony components
symfony/dom-crawler                6.4.16 7.2.0  Eases DOM navigation for HTML and XML documents
symfony/error-handler              6.4.14 7.2.1  Provides tools to manage errors and ease debugging PHP code
symfony/event-dispatcher           6.4.13 7.2.0  Provides tools that allow your application components to communicate with each other by dispatching events and listening to them
symfony/event-dispatcher-contracts 3.5.1  3.5.1  Generic abstractions related to dispatching event
symfony/filesystem                 6.4.13 7.2.0  Provides basic utilities for the filesystem
symfony/finder                     6.4.13 7.2.0  Finds files and directories via an intuitive fluent interface
symfony/http-client-contracts      3.5.1  3.5.2  Generic abstractions related to HTTP clients
symfony/http-foundation            6.4.16 7.2.0  Defines an object-oriented layer for the HTTP specification
symfony/http-kernel                6.4.16 7.2.1  Provides a structured process for converting a Request into a Response
symfony/messenger                  6.4.16 7.2.1  Helps applications send and receive messages to/from other applications or via message queues
symfony/monolog-bridge             6.4.13 7.2.0  Provides integration for Monolog with various Symfony components
symfony/options-resolver           6.4.16 7.2.0  Provides an improved replacement for the array_replace PHP function
symfony/password-hasher            6.4.13 7.2.0  Provides password hashing utilities
symfony/polyfill-intl-grapheme     1.31.0 1.31.0 Symfony polyfill for intl's grapheme_* functions
symfony/polyfill-intl-icu          1.31.0 1.31.0 Symfony polyfill for intl's ICU-related data and classes
symfony/polyfill-intl-idn          1.31.0 1.31.0 Symfony polyfill for intl's idn_to_ascii and idn_to_utf8 functions
symfony/polyfill-intl-normalizer   1.31.0 1.31.0 Symfony polyfill for intl's Normalizer class and related functions
symfony/polyfill-mbstring          1.31.0 1.31.0 Symfony polyfill for the Mbstring extension
symfony/polyfill-php83             1.31.0 1.31.0 Symfony polyfill backporting some PHP 8.3+ features to lower PHP versions
symfony/routing                    6.4.16 7.2.0  Maps an HTTP request to a set of configuration variables
symfony/security-acl               3.3.4  3.3.4  Symfony Security Component - ACL (Access Control List)
symfony/security-core              6.4.16 7.2.0  Symfony Security Component - Core Library
symfony/security-csrf              6.4.13 7.2.0  Symfony Security Component - CSRF Library
symfony/security-http              6.4.15 7.2.1  Symfony Security Component - HTTP Integration
symfony/service-contracts          3.5.1  3.5.1  Generic abstractions related to writing services
symfony/templating                 6.4.13 6.4.13 Provides all the tools needed to build any kind of template system
symfony/var-dumper                 6.4.15 7.2.0  Provides mechanisms for walking through any arbitrary PHP variable
symfony/var-exporter               6.4.13 7.2.0  Allows exporting any serializable PHP data structure to plain PHP code

PHP version

$ php -v
PHP 8.3.14 (cli) (built: Nov 21 2024 19:22:48) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.3.14, Copyright (c) Zend Technologies
    with Zend OPcache v8.3.14, Copyright (c), by Zend Technologies
    with Xdebug v3.3.2, Copyright (c) 2002-2024, by Derick Rethans

Subject

If you configure multiple hosts different from localhost, localization stops working. However, if there is only one host (localhost) and no host-based restrictions in the routes, locale switching works as expected. When there are no host-based restrictions, the PageBundle correctly understands that the locale (e.g., de) is a locale. But if there are two different hosts, it somehow ignores the locale specified in the URL and instead tries to find a route that matches the locale name.

Minimal repository with the bug

I repeated all the steps on the fresh Symfony 6.4 version. If needed, I can upload these changes to Git, but I don't think it's necessary or will be of much help.

Steps to reproduce

1. Create multiple sites. For example:
   | name | relative_path | host | locale |
   | First site EN | | first-site.local | en |
   | First site DE | /de | first-site.local | de |
   | Second site EN | | second-site.local | en |
   | Second site DE | /de | second-site.local | de |

2. Configure routes and bind them to different hosts

3. Run the commands:

• ./bin/console sonata:page:update-core-routes
• ./bin/console sonata:page:create-snapshots

4. Navigate to any page by specifying its locale, for example: first-site.local/de/test-page (or go to the page and switch the language while on it.)

Expected results

The page opens based on the locale specified in the URL.

Actual results

Error: No route found for "GET http://first-site.local/de/test-page"

[vityachis]

If someone encounters a similar problem, my solution is to modify the function \Sonata\PageBundle\Site\BaseSiteSelector::getSites() approximately like this (this is a rough example that can and should be improved):

    protected function getSites(Request $request): array
    {
        $pathInfo = $request->getPathInfo();
        $pathLocale = explode('/', $pathInfo)[1] ?? 'en';
        $locale = in_array($pathLocale, ['en', 'de']) ? $pathLocale : 'en';

        return $this->siteManager->findBy([
            'host' => [$request->getHost(), 'localhost'],
            'locale' => $request->get('_locale', $locale),
            'enabled' => true,
        ], [
            'isDefault' => 'DESC',
        ]);
    }