From f8b7c95e01ba1a25dc1de3e9f224afefd3eec09c Mon Sep 17 00:00:00 2001
From: Karol Labus <karol.labus.kl@gmail.com>
Date: Thu, 17 Sep 2026 16:14:02 +0200
Subject: [PATCH] Fix API JSON serialization to return raw strings for client
 JS

---
 JellyfinPlugin/Api/BlackBarService.cs | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/JellyfinPlugin/Api/BlackBarService.cs b/JellyfinPlugin/Api/BlackBarService.cs
index 8ce857a..4eefd8c 100644
--- a/JellyfinPlugin/Api/BlackBarService.cs
+++ b/JellyfinPlugin/Api/BlackBarService.cs
@@ -21,41 +21,43 @@ namespace JellyfinPlugin.Api
         }
 
         [HttpGet("CropByPath")]
-        public ActionResult<string> GetCropByPath([FromQuery] string path)
+        [Produces("text/plain")]
+        public ContentResult GetCropByPath([FromQuery] string path)
         {
-            if (string.IsNullOrEmpty(path)) return Ok(string.Empty);
+            if (string.IsNullOrEmpty(path)) return Content(string.Empty, "text/plain");
             
             var mode = Plugin.Instance!.Configuration.PlaybackMode;
-            if (mode == "Client") return Ok(string.Empty);
+            if (mode == "Client") return Content(string.Empty, "text/plain");
 
             var item = _libraryManager.RootFolder.GetRecursiveChildren().FirstOrDefault(x => x.Path == path);
             
             if (item != null && item.ProviderIds != null && item.ProviderIds.TryGetValue("BlackBarCrop", out string? cropData))
             {
-                return Ok(cropData ?? string.Empty);
+                return Content(cropData ?? string.Empty, "text/plain");
             }
 
-            return Ok(string.Empty);
+            return Content(string.Empty, "text/plain");
         }
 
         [HttpGet("CropById")]
-        public ActionResult<string> GetCropById([FromQuery] string itemId)
+        [Produces("text/plain")]
+        public ContentResult GetCropById([FromQuery] string itemId)
         {
-            if (string.IsNullOrEmpty(itemId)) return Ok(string.Empty);
+            if (string.IsNullOrEmpty(itemId)) return Content(string.Empty, "text/plain");
 
             var mode = Plugin.Instance!.Configuration.PlaybackMode;
-            if (mode == "Server") return Ok(string.Empty);
+            if (mode == "Server") return Content(string.Empty, "text/plain");
 
             if (Guid.TryParse(itemId, out Guid id))
             {
                 var item = _libraryManager.GetItemById(id);
                 if (item != null && item.ProviderIds != null && item.ProviderIds.TryGetValue("BlackBarCrop", out string? cropData))
                 {
-                    return Ok(cropData ?? string.Empty);
+                    return Content(cropData ?? string.Empty, "text/plain");
                 }
             }
 
-            return Ok(string.Empty);
+            return Content(string.Empty, "text/plain");
         }
 
         [HttpGet("ClientScript.js")]