Created middleware which ensures trailing slash and multi-segment features work properly together

config/autoload/routes.config.php

@@ -8,6 +8,7 @@ use Fig\Http\Message\RequestMethodInterface;
 use RKA\Middleware\IpAddress;
 use Shlinkio\Shlink\Core\Action as CoreAction;
 use Shlinkio\Shlink\Core\Config\EnvVars;
+use Shlinkio\Shlink\Core\ShortUrl\Middleware\TrimTrailingSlashMiddleware;
 use Shlinkio\Shlink\Rest\Action;
 use Shlinkio\Shlink\Rest\ConfigProvider;
 use Shlinkio\Shlink\Rest\Middleware;
@@ -19,6 +20,8 @@ return (static function (): array {
     $contentNegotiationMiddleware = Middleware\ShortUrl\CreateShortUrlContentNegotiationMiddleware::class;
     $dropDomainMiddleware = Middleware\ShortUrl\DropDefaultDomainFromRequestMiddleware::class;
     $overrideDomainMiddleware = Middleware\ShortUrl\OverrideDomainMiddleware::class;
+
+    // TODO This should be based on config, not the env var
     $shortUrlRouteSuffix = EnvVars::SHORT_URL_TRAILING_SLASH->loadFromEnv(false) ? '[/]' : '';
 
     return [
@@ -97,6 +100,7 @@ return (static function (): array {
                 'path' => sprintf('/{shortCode}%s', $shortUrlRouteSuffix),
                 'middleware' => [
                     IpAddress::class,
+                    TrimTrailingSlashMiddleware::class,
                     CoreAction\RedirectAction::class,
                 ],
                 'allowed_methods' => [RequestMethodInterface::METHOD_GET],

config/autoload/url-shortener.global.php

@@ -24,6 +24,7 @@ return (static function (): array {
             'auto_resolve_titles' => (bool) EnvVars::AUTO_RESOLVE_TITLES->loadFromEnv(false),
             'append_extra_path' => (bool) EnvVars::REDIRECT_APPEND_EXTRA_PATH->loadFromEnv(false),
             'multi_segment_slugs_enabled' => (bool) EnvVars::MULTI_SEGMENT_SLUGS_ENABLED->loadFromEnv(false),
+            'trailing_slash_enabled' => (bool) EnvVars::SHORT_URL_TRAILING_SLASH->loadFromEnv(false),
         ],
 
     ];

config/autoload/url-shortener.local.php.dist

@@ -18,6 +18,7 @@ return [
         ],
         'auto_resolve_titles' => true,
 //        'multi_segment_slugs_enabled' => true,
+//        'trailing_slash_enabled' => true,
     ],
 
 ];