Add missing MIME types for comicbook formats (#11010)

* Correct MIME types for comicbook file extensions

cb7, cba, cbr, cbt and cbz all refer to different types of digital
comicbooks. The last letter of the extension indicates the compression
algorithm that was used: 7zip, arc, rar, tar or zip.

All these filetypes used to have the `application/x-cbr` MIME type
assigned to them. However, that has since been deprecated and was
replaced with

- `application/vnd.comicbook-rar` for rar compressed files and
- `application/vnd.comicbook+zip` for rar compressed files.

Only these two are officially listed by IANA

https://www.iana.org/assignments/media-types/application/vnd.comicbook+zip

. cbr and cbz are by far the most common file extensions for comicbooks.

There's no official MIME type for cb7, cba or cbt files. However, with
rar being a proprietary compression algorithm, FOSS applications will
often refuse to handle files that identify themselves as
`application/x-cbr`, so I decided to assign extension specific MIME
types to them. I've seen these being used by other applications,
specifically comic book readers.

I've read through the docs on iana.org, but haven't figured out why they
chose `-rar`, but `+zip`.

* Add conversions from MIME type to file extensions for comicbook formats

cb7, cba, cbr, cbt and cbz all refer to different types of digital
comicbooks. The last letter of the extension indicates the compression
algorithm that was used: 7zip, arc, rar, tar or zip.

All these filetypes used to have the `application/x-cbr` MIME type
assigned to them. However, that has since been deprecated and was
replaced with

- `application/vnd.comicbook-rar` for rar compressed files and
- `application/vnd.comicbook+zip` for rar compressed files.

Only these two are officially listed by IANA

https://www.iana.org/assignments/media-types/application/vnd.comicbook+zip

. cbr and cbz are by far the most common file extensions for comicbooks.

There's no official MIME type for cb7, cba or cbt files. However, with
rar being a proprietary compression algorithm, FOSS applications will
often refuse to handle files that identify themselves as
`application/x-cbr`, so I decided to assign extension specific MIME
types to them. I've seen these being used by other applications,
specifically comic book readers.

* Update CONTRIBUTORS.md

3 files changed, 23 insertions, 0 deletions

diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index a8ee693ec..55642e4e2 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -251,3 +251,4 @@
  - [Utku Özdemir](https://github.com/utkuozdemir)
  - [JPUC1143](https://github.com/Jpuc1143/)
  - [0x25CBFC4F](https://github.com/0x25CBFC4F)
+ - [Robert Lützner](https://github.com/rluetzner)
diff --git a/MediaBrowser.Model/Net/MimeTypes.cs b/MediaBrowser.Model/Net/MimeTypes.cs
index 7b510a337..90035f18f 100644
--- a/MediaBrowser.Model/Net/MimeTypes.cs
+++ b/MediaBrowser.Model/Net/MimeTypes.cs
@@ -66,6 +66,11 @@ namespace MediaBrowser.Model.Net
         {
             // Type application
             { ".azw3", "application/vnd.amazon.ebook" },
+            { ".cb7", "application/x-cb7" },
+            { ".cba", "application/x-cba" },
+            { ".cbr", "application/vnd.comicbook-rar" },
+            { ".cbt", "application/x-cbt" },
+            { ".cbz", "application/vnd.comicbook+zip" },
 
             // Type image
             { ".tbn", "image/jpeg" },
@@ -98,6 +103,12 @@ namespace MediaBrowser.Model.Net
         private static readonly Dictionary<string, string> _extensionLookup = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
         {
             // Type application
+            { "application/vnd.comicbook-rar", ".cbr" },
+            { "application/vnd.comicbook+zip", ".cbz" },
+            { "application/x-cb7", ".cb7" },
+            { "application/x-cba", ".cba" },
+            { "application/x-cbr", ".cbr" },
+            { "application/x-cbt", ".cbt" },
             { "application/x-cbz", ".cbz" },
             { "application/x-javascript", ".js" },
             { "application/xml", ".xml" },
diff --git a/tests/Jellyfin.Model.Tests/Net/MimeTypesTests.cs b/tests/Jellyfin.Model.Tests/Net/MimeTypesTests.cs
index ccdf01758..a18a85ec0 100644
--- a/tests/Jellyfin.Model.Tests/Net/MimeTypesTests.cs
+++ b/tests/Jellyfin.Model.Tests/Net/MimeTypesTests.cs
@@ -6,6 +6,11 @@ namespace Jellyfin.Model.Tests.Net
     public class MimeTypesTests
     {
         [Theory]
+        [InlineData(".cb7", "application/x-cb7")]
+        [InlineData(".cba", "application/x-cba")]
+        [InlineData(".cbr", "application/vnd.comicbook-rar")]
+        [InlineData(".cbt", "application/x-cbt")]
+        [InlineData(".cbz", "application/vnd.comicbook+zip")]
         [InlineData(".dll", "application/octet-stream")]
         [InlineData(".log", "text/plain")]
         [InlineData(".srt", "application/x-subrip")]
@@ -94,10 +99,16 @@ namespace Jellyfin.Model.Tests.Net
         [InlineData("application/pdf", ".pdf")]
         [InlineData("application/ttml+xml", ".ttml")]
         [InlineData("application/vnd.amazon.ebook", ".azw")]
+        [InlineData("application/vnd.comicbook-rar", ".cbr")]
+        [InlineData("application/vnd.comicbook+zip", ".cbz")]
         [InlineData("application/vnd.ms-fontobject", ".eot")]
         [InlineData("application/vnd.rar", ".rar")]
         [InlineData("application/wasm", ".wasm")]
         [InlineData("application/x-7z-compressed", ".7z")]
+        [InlineData("application/x-cb7", ".cb7")]
+        [InlineData("application/x-cba", ".cba")]
+        [InlineData("application/x-cbr", ".cbr")]
+        [InlineData("application/x-cbt", ".cbt")]
         [InlineData("application/x-cbz", ".cbz")]
         [InlineData("application/x-javascript", ".js")]
         [InlineData("application/x-mobipocket-ebook", ".mobi")]