kobo cover in jpg

Author: gotson

komga/src/main/kotlin/org/gotson/komga/interfaces/api/kobo/KoboController.kt

@@ -503,13 +503,20 @@ class KoboController(
     @PathVariable quality: String?,
     @PathVariable isGreyScale: String?,
   ): ResponseEntity<Any> =
-    if (!bookRepository.existsById(bookId) && koboProxy.isEnabled())
+    if (!bookRepository.existsById(bookId) && koboProxy.isEnabled()) {
       ResponseEntity
         .status(HttpStatus.TEMPORARY_REDIRECT)
         .location(UriComponentsBuilder.fromHttpUrl(koboProxy.imageHostUrl).buildAndExpand(bookId, width, height).toUri())
         .build()
-    else
-      ResponseEntity.ok(bookLifecycle.getThumbnailBytes(bookId)?.bytes ?: throw ResponseStatusException(HttpStatus.NOT_FOUND))
+    } else {
+      val poster = bookLifecycle.getThumbnailBytes(bookId) ?: throw ResponseStatusException(HttpStatus.NOT_FOUND)
+      val posterBytes =
+        if (poster.mediaType != ImageType.JPEG.mediaType)
+          imageConverter.convertImage(poster.bytes, ImageType.JPEG.imageIOFormat)
+        else
+          poster.bytes
+      ResponseEntity.ok(posterBytes)
+    }
 
   @RequestMapping(
     value = ["{*path}"],