Fix dynamic download content types

src/main/java/io/papermc/bibliothek/controller/v2/DownloadController.java

@@ -35,8 +35,8 @@
 import io.papermc.bibliothek.exception.DownloadNotFound;
 import io.papermc.bibliothek.exception.ProjectNotFound;
 import io.papermc.bibliothek.exception.VersionNotFound;
-import io.papermc.bibliothek.util.CustomFileNameMap;
 import io.papermc.bibliothek.util.HTTP;
+import io.papermc.bibliothek.util.MediaTypeMap;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.headers.Header;
@@ -66,7 +66,7 @@
 public class DownloadController {
   private static final CacheControl CACHE_LATEST = HTTP.sMaxAgePublicCache(Duration.ofMinutes(1));
   private static final CacheControl CACHE_SPECIFIC = HTTP.sMaxAgePublicCache(Duration.ofDays(14));
-  private static final CustomFileNameMap FILE_NAME_MAP = new CustomFileNameMap();
+  private static final MediaTypeMap FILE_NAME_MAP = new MediaTypeMap();
   private final AppConfiguration configuration;
   private final ProjectCollection projects;
   private final VersionCollection versions;
@@ -203,7 +203,7 @@ private static HttpHeaders headersFor(final Path path, final CacheControl cache)
       final HttpHeaders headers = new HttpHeaders();
       headers.setCacheControl(cache);
       headers.setContentDisposition(HTTP.attachmentDisposition(path.getFileName()));
-      headers.setContentType(MediaType.valueOf(FILE_NAME_MAP.getContentTypeFor(path.getFileName().toString())));
+      headers.setContentType(FILE_NAME_MAP.mediaTypeFor(path.getFileName().toString()));
       headers.setLastModified(Files.getLastModifiedTime(path).toInstant());
       return headers;
     }

src/main/java/io/papermc/bibliothek/util/HTTP.java

@@ -30,7 +30,6 @@
 import org.springframework.http.ContentDisposition;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
-import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 
 public final class HTTP {

src/main/java/io/papermc/bibliothek/util/CustomFileNameMap.java → src/main/java/io/papermc/bibliothek/util/MediaTypeMap.java

@@ -1,7 +1,7 @@
 /*
  * This file is part of bibliothek, licensed under the MIT License.
  *
- * Copyright (c) 2024 GeyserMC
+ * Copyright (c) 2019-2023 PaperMC
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
@@ -23,24 +23,24 @@
  */
 package io.papermc.bibliothek.util;
 
-import java.net.FileNameMap;
-import java.net.URLConnection;
 import java.util.HashMap;
 import java.util.Map;
+import org.springframework.http.MediaType;
+import org.springframework.http.MediaTypeFactory;
 
-public class CustomFileNameMap implements FileNameMap {
-  private final FileNameMap internalMap = URLConnection.getFileNameMap();
-
-  private final Map<String, String> customMap = new HashMap<>() {{
-    put("mcpack", "application/zip");
-  }};
+public class MediaTypeMap {
+  private final Map<String, MediaType> customMap = new HashMap<>() {
+    {
+      put("mcpack", MediaType.parseMediaType("application/zip"));
+    }
+  };
 
-  public String getContentTypeFor(String fileName) {
-    return customMap.getOrDefault(getExtension(fileName), internalMap.getContentTypeFor(fileName));
+  public MediaType mediaTypeFor(final String fileName) {
+    return this.customMap.getOrDefault(this.fileExtension(fileName), MediaTypeFactory.getMediaType(fileName).orElse(MediaType.APPLICATION_OCTET_STREAM));
   }
 
-  private String getExtension(String fileName) {
-    int index = fileName.lastIndexOf('.');
+  private String fileExtension(final String fileName) {
+    final int index = fileName.lastIndexOf('.');
     if (index == -1) {
       return "";
     }