fix artwork in kodi (#359)

CHANGELOG.md

@@ -9,6 +9,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
   - Syntax is a number and a unit (days, weeks, months, years) like `1 week` or `2 years`
 - Allow adding smart collections to multi collections
 
+### Fixed
+- Use fake image extension (`.jpg`) for artwork in M3U and XMLTV to make Kodi happy since it detects MIME type from URL
+
 ## [0.0.56-alpha] - 2021-09-10
 ### Added
 - Add Smart Collections

ErsatzTV.Core/Iptv/ChannelGuide.cs

@@ -276,7 +276,7 @@ namespace ErsatzTV.Core.Iptv
                     _ => "posters"
                 };
 
-                artworkPath = $"{_scheme}://{_host}/iptv/artwork/{artworkFolder}/{artwork.Path}";
+                artworkPath = $"{_scheme}://{_host}/iptv/artwork/{artworkFolder}/{artwork.Path}.jpg";
             }
 
             return artworkPath;

ErsatzTV.Core/Iptv/ChannelPlaylist.cs

@@ -32,7 +32,7 @@ namespace ErsatzTV.Core.Iptv
                     .Filter(a => a.ArtworkKind == ArtworkKind.Logo)
                     .HeadOrNone()
                     .Match(
-                        artwork => $"{_scheme}://{_host}/iptv/logos/{artwork.Path}",
+                        artwork => $"{_scheme}://{_host}/iptv/logos/{artwork.Path}.jpg",
                         () => $"{_scheme}://{_host}/iptv/images/ersatztv-500.png");
 
                 string shortUniqueId = Convert.ToBase64String(channel.UniqueId.ToByteArray())

ErsatzTV/Controllers/ArtworkController.cs

@@ -36,6 +36,7 @@ namespace ErsatzTV.Controllers
         }
 
         [HttpGet("/iptv/artwork/posters/{fileName}")]
+        [HttpGet("/iptv/artwork/posters/{fileName}.jpg")]
         [HttpGet("/artwork/posters/{fileName}")]
         public async Task<IActionResult> GetPoster(string fileName)
         {
@@ -117,6 +118,7 @@ namespace ErsatzTV.Controllers
                 $"photo/:/transcode?url=/{path}&height=220&width=392&minSize=1&upscale=0");
 
         [HttpGet("/iptv/artwork/thumbnails/{fileName}")]
+        [HttpGet("/iptv/artwork/thumbnails/{fileName}.jpg")]
         [HttpGet("/artwork/thumbnails/{fileName}")]
         public async Task<IActionResult> GetThumbnail(string fileName)
         {

ErsatzTV/Controllers/IptvController.cs

@@ -71,6 +71,7 @@ namespace ErsatzTV.Controllers
                         error => BadRequest(error.Value)));
 
         [HttpGet("iptv/logos/{fileName}")]
+        [HttpGet("iptv/logos/{fileName}.jpg")]
         public async Task<IActionResult> GetImage(string fileName)
         {
             Either<BaseError, CachedImagePathViewModel> cachedImagePath =