Friendly prompt if response code is not OK

HMCL/src/main/java/org/jackhuang/hmcl/ui/download/InstallerWizardProvider.java

@@ -34,6 +34,8 @@ import org.jackhuang.hmcl.ui.construct.MessageDialogPane.MessageType;
 import org.jackhuang.hmcl.ui.wizard.WizardController;
 import org.jackhuang.hmcl.ui.wizard.WizardProvider;
 import org.jackhuang.hmcl.util.StringUtils;
+import org.jackhuang.hmcl.util.i18n.I18n;
+import org.jackhuang.hmcl.util.io.ResponseCodeException;
 
 import java.net.SocketTimeoutException;
 import java.util.Map;
@@ -128,6 +130,13 @@ public final class InstallerWizardProvider implements WizardProvider {
         } else if (exception instanceof DownloadException) {
             if (exception.getCause() instanceof SocketTimeoutException) {
                 Controllers.dialog(i18n("install.failed.downloading.timeout", ((DownloadException) exception).getUrl()), i18n("install.failed.downloading"), MessageType.ERROR, next);
+            } else if (exception.getCause() instanceof ResponseCodeException) {
+                ResponseCodeException responseCodeException = (ResponseCodeException) exception.getCause();
+                if (I18n.hasKey("download.code." + responseCodeException.getResponseCode())) {
+                    Controllers.dialog(i18n("download.code." + responseCodeException.getResponseCode()) + ", " + ((DownloadException) exception).getUrl() + "\n" + StringUtils.getStackTrace(exception.getCause()), i18n("install.failed.downloading"), MessageType.ERROR, next);
+                } else {
+                    Controllers.dialog(i18n("install.failed.downloading.detail", ((DownloadException) exception).getUrl()) + "\n" + StringUtils.getStackTrace(exception.getCause()), i18n("install.failed.downloading"), MessageType.ERROR, next);
+                }
             } else {
                 Controllers.dialog(i18n("install.failed.downloading.detail", ((DownloadException) exception).getUrl()) + "\n" + StringUtils.getStackTrace(exception.getCause()), i18n("install.failed.downloading"), MessageType.ERROR, next);
             }

HMCL/src/main/java/org/jackhuang/hmcl/util/i18n/I18n.java

@@ -57,4 +57,12 @@ public final class I18n {
         }
     }
 
+    public static boolean hasKey(String key) {
+        try {
+            getResourceBundle().getString(key);
+            return true;
+        } catch (MissingResourceException e) {
+            return false;
+        }
+    }
 }

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

@@ -91,6 +91,7 @@ crash.NoClassDefFound=Please check "HMCL" software is complete.
 crash.user_fault=Your OS or Java environment may not be properly installed resulting in crashing of this software, please check your Java Environment or your computer!
 
 download=Download
+download.code.404=File does not found in remote server
 download.failed=Failed to download
 download.failed.empty=No candidates. Click here to return.
 download.failed.refresh=Unable to load version list. Click here to retry.

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

@@ -90,6 +90,7 @@ crash.NoClassDefFound=請確認 HMCL 本體是否完整，或更新您的 Java
 crash.user_fault=您的系統或 Java 環境可能安裝不當導致本軟體崩潰，請檢查您的 Java 環境或您的電腦！可以嘗試重新安裝 Java。
 
 download=下載
+download.code.404=遠程伺服器不包含需要下載的文件
 download.failed=下載失敗
 download.failed.empty=沒有可供安裝的版本，點擊此處返回。
 download.failed.refresh=載入版本列表失敗，點擊此處重試。

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

@@ -90,6 +90,7 @@ crash.NoClassDefFound=请确认 HMCL 本体是否完整，或更新您的 Java
 crash.user_fault=您的系统或 Java 环境可能安装不当导致本软件崩溃，请检查您的 Java 环境或您的电脑！可以尝试重新安装 Java。
 
 download=下载
+download.code.404=远程服务器不包含需要下载的文件
 download.failed=下载失败
 download.failed.empty=没有可供安装的版本，点击此处返回。
 download.failed.refresh=加载版本列表失败，点击此处重试。

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

@@ -21,10 +21,7 @@ import org.jackhuang.hmcl.event.EventManager;
 import org.jackhuang.hmcl.event.FailedEvent;
 import org.jackhuang.hmcl.util.CacheRepository;
 import org.jackhuang.hmcl.util.Logging;
-import org.jackhuang.hmcl.util.io.ChecksumMismatchException;
+import org.jackhuang.hmcl.util.io.*;
-import org.jackhuang.hmcl.util.io.FileUtils;
-import org.jackhuang.hmcl.util.io.IOUtils;
-import org.jackhuang.hmcl.util.io.NetworkUtils;
 
 import java.io.File;
 import java.io.IOException;
@@ -233,7 +230,7 @@ public class FileDownloadTask extends Task {
                         repository.removeRemoteEntry(con);
                     }
                 } else if (con.getResponseCode() / 100 != 2) {
-                    throw new IOException("Server error, response code: " + con.getResponseCode());
+                    throw new ResponseCodeException(currentURL, con.getResponseCode());
                 }
 
                 int contentLength = con.getContentLength();

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

@@ -0,0 +1,41 @@
+/*
+ * Hello Minecraft! Launcher
+ * Copyright (C) 2019  huangyuhui <huanghongxun2008@126.com> 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.util.io;
+
+import java.io.IOException;
+import java.net.URL;
+
+public class ResponseCodeException extends IOException {
+
+    private final URL url;
+    private final int responseCode;
+
+    public ResponseCodeException(URL url, int responseCode) {
+        super("Unable to request url " + url + ", response code: " + responseCode);
+        this.url = url;
+        this.responseCode = responseCode;
+    }
+
+    public URL getUrl() {
+        return url;
+    }
+
+    public int getResponseCode() {
+        return responseCode;
+    }
+}