Support downloading OptiFine from it's own maven.

HMCL/src/main/resources/assets/lang/I18N.properties

@@ -328,7 +328,7 @@ download.failed.no_code=Failed to download %s
 download.failed.refresh=Unable to fetch version list. Please click here to retry.
 download.game=Game
 download.provider.bmclapi=BMCLAPI (bangbang93, https://bmclapi2.bangbang93.com/)
-download.provider.mojang=Mojang (OptiFine is provided by BMCLAPI)
+download.provider.mojang=Mojang (OptiFine is provided by OF-302)
 download.provider.official=From Official Sources
 download.provider.balanced=From Fastest Available
 download.provider.mirror=From Mirror

HMCL/src/main/resources/assets/lang/I18N_es.properties

@@ -301,7 +301,7 @@ download.failed.empty=No hay versiones disponibles, por favor haga clic aquí pa
 download.failed.refresh=No se ha podido obtener la lista de versiones. Por favor, haga clic aquí para volver a intentarlo.
 download.game=Juego
 download.provider.bmclapi=BMCLAPI (bangbang93, https://bmclapi2.bangbang93.com/)
-download.provider.mojang=Mojang (OptiFine es proporcionado por BMCLAPI)
+download.provider.mojang=Mojang (OptiFine es proporcionado por OF-302)
 download.provider.official=De fuentes oficiales
 download.provider.balanced=De la fuente más rápida disponible
 download.provider.mirror=Desde espejo

HMCL/src/main/resources/assets/lang/I18N_ja.properties

@@ -283,7 +283,7 @@ download.failed.empty=候補者なし。戻るにはここをクリックして
 download.failed.refresh=バージョンリストをダウンロードできません。ここをクリックして再試行してください。
 download.game=ゲームのダウンロード
 download.provider.bmclapi=BMCLAPI（ミラーソース）
-download.provider.mojang=Mojang（OptiFineはBMCLAPIにより提供されます） 推奨
+download.provider.mojang=Mojang（OptiFineはOF-302により提供されます） 推奨
 download.provider.official=公式ソースからロード
 download.provider.balanced=mcbbsのソースからロード
 download.provider.mirror=ミラーソースからロード

HMCL/src/main/resources/assets/lang/I18N_ru.properties

@@ -300,7 +300,7 @@ download.failed.empty=Версий нет. Нажмите здесь, чтобы
 download.failed.refresh=Не удаётся получить список версий. Нажмите здесь, чтобы повторить попытку.
 download.game=Игра
 download.provider.bmclapi=BMCLAPI (bangbang93, https://bmclapi2.bangbang93.com/)
-download.provider.mojang=Mojang (OptiFine is provided by BMCLAPI)
+download.provider.mojang=Mojang (OptiFine is provided by OF-302)
 download.provider.official=Из официальных источников
 download.provider.balanced=Из самых быстрых доступных
 download.provider.mirror=Из зеркала

HMCL/src/main/resources/assets/lang/I18N_zh.properties

@@ -337,7 +337,7 @@ download.failed.no_code=下載失敗: %s
 download.failed.refresh=載入版本列表失敗，按一下此處重試。
 download.game=新遊戲
 download.provider.bmclapi=BMCLAPI (bangbang93，https://bmclapi2.bangbang93.com/)
-download.provider.mojang=官方伺服器 (OptiFine 自動安裝的下載來源是 BMCLAPI)
+download.provider.mojang=官方 (OptiFine 自動安裝使用 OF-302 下載源)
 download.provider.official=儘量使用官方源（最新，但可能加載慢）
 download.provider.balanced=選擇加載速度快的下載源（平衡，但可能不是最新）
 download.provider.mirror=儘量使用鏡像源（加載快，但可能不是最新）

HMCL/src/main/resources/assets/lang/I18N_zh_CN.properties

@@ -338,7 +338,7 @@ download.failed.no_code=下载失败: %s
 download.failed.refresh=[加载版本列表失败，点击此处重试]
 download.game=新游戏
 download.provider.bmclapi=BMCLAPI（bangbang93，https://bmclapi2.bangbang93.com）
-download.provider.mojang=官方（OptiFine 自动安装使用 BMCLAPI 下载源）
+download.provider.mojang=官方（OptiFine 自动安装使用 OF-302 下载源）
 download.provider.official=尽量使用官方源（最新，但可能加载慢）
 download.provider.balanced=选择加载速度快的下载源（平衡，但可能不是最新）
 download.provider.mirror=尽量使用镜像源（加载快，但可能不是最新）

HMCLCore/src/main/java/org/jackhuang/hmcl/download/MojangDownloadProvider.java

@@ -23,7 +23,7 @@
 import org.jackhuang.hmcl.download.game.GameVersionList;
 import org.jackhuang.hmcl.download.liteloader.LiteLoaderVersionList;
 import org.jackhuang.hmcl.download.neoforge.NeoForgeOfficialVersionList;
-import org.jackhuang.hmcl.download.optifine.OptiFineBMCLVersionList;
+import org.jackhuang.hmcl.download.optifine.OptiFine302VersionList;
 import org.jackhuang.hmcl.download.quilt.QuiltAPIVersionList;
 import org.jackhuang.hmcl.download.quilt.QuiltVersionList;
 
@@ -38,7 +38,7 @@ public class MojangDownloadProvider implements DownloadProvider {
     private final ForgeBMCLVersionList forge;
     private final NeoForgeOfficialVersionList neoforge;
     private final LiteLoaderVersionList liteLoader;
-    private final OptiFineBMCLVersionList optifine;
+    private final OptiFine302VersionList optifine;
     private final QuiltVersionList quilt;
     private final QuiltAPIVersionList quiltApi;
 
@@ -52,7 +52,7 @@ public MojangDownloadProvider() {
         this.forge = new ForgeBMCLVersionList(apiRoot);
         this.neoforge = new NeoForgeOfficialVersionList(this);
         this.liteLoader = new LiteLoaderVersionList(this);
-        this.optifine = new OptiFineBMCLVersionList(apiRoot);
+        this.optifine = new OptiFine302VersionList("https://hmcl-dev.github.io/metadata/optifine/");
         this.quilt = new QuiltVersionList(this);
         this.quiltApi = new QuiltAPIVersionList(this);
     }

HMCLCore/src/main/java/org/jackhuang/hmcl/download/optifine/OptiFine302VersionList.java

@@ -0,0 +1,94 @@
+/*
+ * Hello Minecraft! Launcher
+ * Copyright (C) 2020  huangyuhui <[email protected]> and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package org.jackhuang.hmcl.download.optifine;
+
+import com.google.gson.annotations.SerializedName;
+import com.google.gson.reflect.TypeToken;
+import org.jackhuang.hmcl.download.VersionList;
+import org.jackhuang.hmcl.util.io.HttpRequest;
+import org.jackhuang.hmcl.util.versioning.VersionNumber;
+
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.stream.Collectors;
+
+/**
+ * @author huangyuhui
+ */
+public final class OptiFine302VersionList extends VersionList<OptiFineRemoteVersion> {
+    private final String versionListURL;
+
+    public OptiFine302VersionList(String versionListURL) {
+        this.versionListURL = versionListURL;
+    }
+
+    @Override
+    public boolean hasType() {
+        return true;
+    }
+
+    @Override
+    public CompletableFuture<?> refreshAsync() {
+        return HttpRequest.GET(versionListURL).<OptiFine302VersionList.VersionList>getJsonAsync(new TypeToken<OptiFine302VersionList.VersionList>() {
+        }.getType()).thenAcceptAsync(root -> {
+            lock.writeLock().lock();
+
+            try {
+                versions.clear();
+                for (OptiFineVersion element : root.versions) {
+                    String gameVersion = VersionNumber.normalize(element.gameVersion);
+                    versions.put(gameVersion, new OptiFineRemoteVersion(
+                            gameVersion, element.version,
+                            root.downloadBases.stream().map(u -> u + element.fileName).collect(Collectors.toList()),
+                            element.fileName.startsWith("pre")
+                    ));
+                }
+            } finally {
+                lock.writeLock().unlock();
+            }
+        });
+    }
+
+    private static final class VersionList {
+        @SerializedName("file")
+        private final List<OptiFineVersion> versions;
+
+        @SerializedName("download")
+        private final List<String> downloadBases;
+
+        public VersionList(List<OptiFineVersion> versions, List<String> downloadBases) {
+            this.versions = versions;
+            this.downloadBases = downloadBases;
+        }
+    }
+
+    private static final class OptiFineVersion {
+        @SerializedName("name")
+        private final String version;
+        @SerializedName("filename")
+        private final String fileName;
+        @SerializedName("mcversion")
+        private final String gameVersion;
+
+        public OptiFineVersion(String version, String fileName, String gameVersion) {
+            this.version = version;
+            this.fileName = fileName;
+            this.gameVersion = gameVersion;
+        }
+    }
+}

HMCLCore/src/main/java/org/jackhuang/hmcl/download/optifine/OptiFineBMCLVersionList.java

@@ -80,17 +80,17 @@ public CompletableFuture<?> refreshAsync() {
                 versions.clear();
                 Set<String> duplicates = new HashSet<>();
                 for (OptiFineVersion element : root) {
-                    String version = element.getType() + "_" + element.getPatch();
-                    String mirror = "https://bmclapi2.bangbang93.com/optifine/" + toLookupVersion(element.getGameVersion()) + "/" + element.getType() + "/" + element.getPatch();
+                    String version = element.type + "_" + element.patch;
+                    String mirror = apiRoot + "/optifine/" + toLookupVersion(element.gameVersion) + "/" + element.type + "/" + element.patch;
                     if (!duplicates.add(mirror))
                         continue;
 
-                    boolean isPre = element.getPatch() != null && (element.getPatch().startsWith("pre") || element.getPatch().startsWith("alpha"));
+                    boolean isPre = element.patch != null && (element.patch.startsWith("pre") || element.patch.startsWith("alpha"));
 
-                    if (StringUtils.isBlank(element.getGameVersion()))
+                    if (StringUtils.isBlank(element.gameVersion))
                         continue;
 
-                    String gameVersion = VersionNumber.normalize(fromLookupVersion(element.getGameVersion()));
+                    String gameVersion = VersionNumber.normalize(fromLookupVersion(element.gameVersion));
                     versions.put(gameVersion, new OptiFineRemoteVersion(gameVersion, version, Collections.singletonList(mirror), isPre));
                 }
             } finally {
@@ -103,68 +103,19 @@ public CompletableFuture<?> refreshAsync() {
      * @author huangyuhui
      */
     private static final class OptiFineVersion {
-
-        @SerializedName("dl")
-        private final String downloadLink;
-
-        @SerializedName("ver")
-        private final String version;
-
-        @SerializedName("date")
-        private final String date;
-
         @SerializedName("type")
         private final String type;
 
         @SerializedName("patch")
         private final String patch;
 
-        @SerializedName("mirror")
-        private final String mirror;
-
         @SerializedName("mcversion")
         private final String gameVersion;
 
-        public OptiFineVersion() {
-            this(null, null, null, null, null, null, null);
-        }
-
-        public OptiFineVersion(String downloadLink, String version, String date, String type, String patch, String mirror, String gameVersion) {
-            this.downloadLink = downloadLink;
-            this.version = version;
-            this.date = date;
+        public OptiFineVersion(String type, String patch, String gameVersion) {
             this.type = type;
             this.patch = patch;
-            this.mirror = mirror;
             this.gameVersion = gameVersion;
         }
-
-        public String getDownloadLink() {
-            return downloadLink;
-        }
-
-        public String getVersion() {
-            return version;
-        }
-
-        public String getDate() {
-            return date;
-        }
-
-        public String getType() {
-            return type;
-        }
-
-        public String getPatch() {
-            return patch;
-        }
-
-        public String getMirror() {
-            return mirror;
-        }
-
-        public String getGameVersion() {
-            return gameVersion;
-        }
     }
 }