GetTask 应当遵循 Content-Type 中的字符集设置 (#4183)

HMCLCore/src/main/java/org/jackhuang/hmcl/task/GetTask.java

@@ -29,8 +29,6 @@ import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.List;
 
-import static java.nio.charset.StandardCharsets.UTF_8;
-
 /**
  * @author huangyuhui
  */
@@ -74,7 +72,7 @@ public final class GetTask extends FetchTask<String> {
             public void close() throws IOException {
                 if (!isSuccess()) return;
 
-                String result = baos.toString(UTF_8);
+                String result = baos.toString(NetworkUtils.getCharsetFromContentType(connection.getContentType()));
                 setResult(result);
 
                 if (checkETag) {

HMCLCore/src/main/java/org/jackhuang/hmcl/util/io/NetworkUtils.java

@@ -303,7 +303,7 @@ public final class NetworkUtils {
 
     static final Pattern CHARSET_REGEX = Pattern.compile("\\s*(charset)\\s*=\\s*['|\"]?(?<charset>[^\"^';,]+)['|\"]?");
 
-    static Charset getCharsetFromContentType(String contentType) {
+    public static Charset getCharsetFromContentType(String contentType) {
         if (contentType == null || contentType.isBlank())
             return UTF_8;