[5.x] Ensure Glide treats asset urls starting with the app url as internal assets

src/Assets/AssetContainer.php

@@ -27,7 +27,6 @@
 use Statamic\Facades\Stache;
 use Statamic\Facades\URL;
 use Statamic\Support\Arr;
-use Statamic\Support\Str;
 use Statamic\Support\Traits\FluentlyGetsAndSets;
 
 class AssetContainer implements Arrayable, ArrayAccess, AssetContainerContract, Augmentable
@@ -139,9 +138,7 @@ public function url()
             return null;
         }
 
-        $url = (string) Str::of($this->disk()->url('/'))
-            ->rtrim('/')
-            ->after(config('app.url'));
+        $url = rtrim($this->disk()->url('/'), '/');
 
         return ($url === '') ? '/' : $url;
     }

src/Tags/Glide.php

@@ -279,6 +279,10 @@ private function normalizeItem($item)
             return $item;
         }
 
+        if (Str::startsWith($item, config('app.url'))) {
+            $item = Str::after($item, config('app.url'));
+        }
+
         // External URLs are already fine as-is.
         if (Str::startsWith($item, ['http://', 'https://'])) {
             return $item;

tests/Assets/AssetContainerTest.php

@@ -137,21 +137,6 @@ public function it_gets_the_url_from_the_disk_config_when_its_relative()
         $this->assertEquals('http://localhost/container', $container->absoluteUrl());
     }
 
-    #[Test]
-    public function it_gets_the_url_from_the_disk_config_when_its_app_url()
-    {
-        config(['filesystems.disks.test' => [
-            'driver' => 'local',
-            'root' => __DIR__.'/__fixtures__/container',
-            'url' => 'http://localhost/container',
-        ]]);
-
-        $container = (new AssetContainer)->disk('test');
-
-        $this->assertEquals('/container', $container->url());
-        $this->assertEquals('http://localhost/container', $container->absoluteUrl());
-    }
-
     #[Test]
     public function its_private_if_the_disk_has_no_url()
     {

tests/Tags/GlideTest.php

@@ -67,6 +67,20 @@ public function it_outputs_a_data_url()
         $this->assertStringStartsWith('data:image/jpeg;base64', (string) Parse::template($tag, ['foo' => 'bar.jpg']));
     }
 
+    #[Test]
+    #[DefineEnvironment('absoluteHttpRouteUrlWithoutCache')]
+    /**
+     * https://github.com/statamic/cms/pull/11839
+     */
+    public function it_treats_assets_urls_starting_with_the_app_url_as_internal_assets()
+    {
+        $this->createImageInPublicDirectory();
+
+        $result = (string) Parse::template('{{ glide:foo width="100" }}', ['foo' => 'http://localhost/glide/bar.jpg']);
+
+        $this->assertStringStartsWith('/img/glide/bar.jpg', $result);
+    }
+
     public function relativeRouteUrl($app)
     {
         $this->configureGlideCacheDiskWithUrl($app, '/glide');
@@ -77,20 +91,25 @@ public function absoluteHttpRouteUrl($app)
         $this->configureGlideCacheDiskWithUrl($app, 'http://localhost/glide');
     }
 
+    public function absoluteHttpRouteUrlWithoutCache($app)
+    {
+        $this->configureGlideCacheDiskWithUrl($app, 'http://localhost/glide', false);
+    }
+
     public function absoluteHttpsRouteUrl($app)
     {
         $this->configureGlideCacheDiskWithUrl($app, 'https://localhost/glide');
     }
 
-    private function configureGlideCacheDiskWithUrl($app, $url)
+    private function configureGlideCacheDiskWithUrl($app, $url, $cache = 'glide')
     {
         $app['config']->set('filesystems.disks.glide', [
             'driver' => 'local',
             'root' => public_path('glide'),
             'url' => $url,
             'visibility' => 'public',
         ]);
-        $app['config']->set('statamic.assets.image_manipulation.cache', 'glide');
+        $app['config']->set('statamic.assets.image_manipulation.cache', $cache);
     }
 
     private function createImageInPublicDirectory()