Backport pull request #13439 from jellyfin/release-10.10.z

Fall back to calculating mime type from path when needed

Original-merge: 8aa4e2e32037c15d4d08f40a776943a4d1575302

Merged-by: crobibero <cody@robibe.ro>

Backported-by: Bond_009 <bond.009@outlook.com>

MediaBrowser.Providers/Manager/ItemImageProvider.cs

@@ -6,6 +6,7 @@ using System.IO;
 using System.Linq;
 using System.Net;
 using System.Net.Http;
+using System.Net.Mime;
 using System.Threading;
 using System.Threading.Tasks;
 using MediaBrowser.Controller.Entities;
@@ -551,10 +552,16 @@ namespace MediaBrowser.Providers.Manager
                     var stream = await response.Content.ReadAsStreamAsync(cancellationToken).ConfigureAwait(false);
                     await using (stream.ConfigureAwait(false))
                     {
+                        var mimetype = response.Content.Headers.ContentType?.MediaType;
+                        if (mimetype is null || mimetype.Equals(MediaTypeNames.Application.Octet, StringComparison.OrdinalIgnoreCase))
+                        {
+                            mimetype = MimeTypes.GetMimeType(response.RequestMessage.RequestUri.GetLeftPart(UriPartial.Path));
+                        }
+
                         await _providerManager.SaveImage(
                             item,
                             stream,
-                            response.Content.Headers.ContentType?.MediaType,
+                            mimetype,
                             type,
                             null,
                             cancellationToken).ConfigureAwait(false);
@@ -677,10 +684,16 @@ namespace MediaBrowser.Providers.Manager
                     var stream = await response.Content.ReadAsStreamAsync(cancellationToken).ConfigureAwait(false);
                     await using (stream.ConfigureAwait(false))
                     {
+                        var mimetype = response.Content.Headers.ContentType?.MediaType;
+                        if (mimetype is null || mimetype.Equals(MediaTypeNames.Application.Octet, StringComparison.OrdinalIgnoreCase))
+                        {
+                            mimetype = MimeTypes.GetMimeType(response.RequestMessage.RequestUri.GetLeftPart(UriPartial.Path));
+                        }
+
                         await _providerManager.SaveImage(
                             item,
                             stream,
-                            response.Content.Headers.ContentType?.MediaType,
+                            mimetype,
                             imageType,
                             null,
                             cancellationToken).ConfigureAwait(false);

MediaBrowser.Providers/Manager/ProviderManager.cs

@@ -205,27 +205,10 @@ namespace MediaBrowser.Providers.Manager
                     {
                         contentType = MediaTypeNames.Image.Png;
                     }
-                    else
-                    {
-                        // Deduce content type from file extension
-                        contentType = MimeTypes.GetMimeType(new Uri(url).GetLeftPart(UriPartial.Path));
-                    }
-
-                    // Throw if we still can't determine the content type
-                    if (string.IsNullOrEmpty(contentType))
-                    {
-                        throw new HttpRequestException("Invalid image received: contentType not set.", null, response.StatusCode);
-                    }
-                }
-
-                // TVDb will sometimes serve a rubbish 404 html page with a 200 OK code, because reasons...
-                if (contentType.Equals(MediaTypeNames.Text.Html, StringComparison.OrdinalIgnoreCase))
-                {
-                    throw new HttpRequestException("Invalid image received.", null, HttpStatusCode.NotFound);
                 }
 
-                // some iptv/epg providers don't correctly report media type, extract from url if no extension found
-                if (string.IsNullOrWhiteSpace(MimeTypes.ToExtension(contentType)))
+                // some providers don't correctly report media type, extract from url if no extension found
+                if (contentType is null || contentType.Equals(MediaTypeNames.Application.Octet, StringComparison.OrdinalIgnoreCase))
                 {
                     // Strip query parameters from url to get actual path.
                     contentType = MimeTypes.GetMimeType(new Uri(url).GetLeftPart(UriPartial.Path));
@@ -233,7 +216,7 @@ namespace MediaBrowser.Providers.Manager
 
                 if (!contentType.StartsWith("image/", StringComparison.OrdinalIgnoreCase))
                 {
-                    throw new HttpRequestException($"Request returned {contentType} instead of an image type", null, HttpStatusCode.NotFound);
+                    throw new HttpRequestException($"Request returned '{contentType}' instead of an image type", null, HttpStatusCode.NotFound);
                 }
 
                 var responseBytes = await response.Content.ReadAsByteArrayAsync(cancellationToken).ConfigureAwait(false);