Adding EPUB export to wallabag API

patch-api-export-epub.diff

diff --git a/src/Wallabag/ApiBundle/Controller/WallabagRestController.php b/src/Wallabag/ApiBundle/Controller/WallabagRestController.php
index af24e49..f64b4aa 100644
--- a/src/Wallabag/ApiBundle/Controller/WallabagRestController.php
+++ b/src/Wallabag/ApiBundle/Controller/WallabagRestController.php
@@ -79,11 +79,18 @@ class WallabagRestController extends FOSRestController
      *
      * @return Response
      */
-    public function getEntryAction(Entry $entry)
+    public function getEntryAction(Entry $entry, $_format)
     {
         $this->validateAuthentication();
         $this->validateUserAccess($entry->getUser()->getId());
 
+        if ($_format === 'epub') {
+            return $this->get('wallabag_core.helper.entries_export')
+                ->setEntries($entry)
+                ->updateTitle('entry')
+                ->exportAs($_format);
+        }
+
         $json = $this->get('serializer')->serialize($entry, 'json');
 
         return $this->renderJsonResponse($json);
diff --git a/src/Wallabag/ApiBundle/Resources/config/routing_rest.yml b/src/Wallabag/ApiBundle/Resources/config/routing_rest.yml
index 5f43f97..9aef7e8 100644
--- a/src/Wallabag/ApiBundle/Resources/config/routing_rest.yml
+++ b/src/Wallabag/ApiBundle/Resources/config/routing_rest.yml
@@ -2,3 +2,5 @@ entries:
   type: rest
   resource:     "WallabagApiBundle:WallabagRest"
   name_prefix:  api_
+  requirements:
+    _format: xml|json|html|epub

With this patch, the /api/entries/X.format API endpoint can be called with epub as format (and not only JSON) to export the EPUB version of an entry.

For instance: https://WALLABAG_INSTANCE_URL/api/entries/2343.epub?access_token=YOUR_TOKEN