Merge pull request #10 from discoverygarden/feature/cors-access

MIR-12: CORS access and more flexible config

README.md

@@ -36,6 +36,15 @@ There are some environment variables to help integrate with IIIF Image APIs, in
 
 Presently, we indicate `level2` compliance for each IIIF Image API endpoint.
 
+As a point of convenience, it is possible to specify the `IIIF_IMAGE_V*_SLUG`
+values using `base:`, as used by
+[Drupal's `Url::fromUri()`](https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Url.php/function/Url%3A%3AfromUri/10).
+For example, if you are using a proxy to make a `/iiif/2` path for a IIIF-I v2
+endpoint, such that your slug would be
+`https://{your hostname}/iiif/2/{identifier}`, then you can instead use
+`base:/iiif/2/{identifier}` to configure the reference more explicitly relative
+to the hostname used to access the site.
+
 ## Troubleshooting/Issues
 
 Having problems or solved one? contact

src/Controller/V3/ManifestController.php

@@ -44,7 +44,11 @@ public function build(string $parameter_name, RouteMatchInterface $route_match)
     return (new JsonResponse(
       $this->serializer->serialize($_entity, 'iiif-p-v3'),
       200,
-      [],
+      [
+        'Access-Control-Allow-Credentials' => 'true',
+        'Access-Control-Allow-Origin' => '*',
+        'Access-Control-Allow-Methods' => 'GET',
+      ],
       TRUE
     ));
   }

src/EventSubscriber/V3/BaseImageBodyEventSubscriber.php

@@ -3,6 +3,7 @@
 namespace Drupal\iiif_presentation_api\EventSubscriber\V3;
 
 use Drupal\Component\Plugin\PluginManagerInterface;
+use Drupal\Core\Url;
 use Drupal\file\FileInterface;
 use Drupal\iiif_presentation_api\Event\V3\ImageBodyEvent;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
@@ -75,13 +76,13 @@ protected function getBody(?string $slug, FileInterface $file, array $extra = []
       '{identifier}' => rawurlencode($id_plugin->getIdentifier($file)),
     ]);
     return [
-      'id' => "{$base_id}/full/{$size}/0/default.jpg",
+      'id' => Url::fromUri("{$base_id}/full/{$size}/0/default.jpg", ['absolute' => TRUE])->toString(),
       'type' => 'Image',
       'format' => 'image/jpeg',
       'service' => [
         [
           // @todo Add in auth in some manner.
-          'id' => $base_id,
+          'id' => Url::fromUri($base_id, ['absolute' => TRUE])->toString(),
         ] + $extra,
       ],
     ];