1 files changed, 51 insertions, 0 deletions
diff --git a/src/main/java/io/github/moulberry/notenoughupdates/util/NetUtils.java b/src/main/java/io/github/moulberry/notenoughupdates/util/NetUtils.java
new file mode 100644
index 00000000..b09dd839
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+++ b/src/main/java/io/github/moulberry/notenoughupdates/util/NetUtils.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2022 NotEnoughUpdates contributors
+ *
+ * This file is part of NotEnoughUpdates.
+ *
+ * NotEnoughUpdates is free software: you can redistribute it
+ * and/or modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation, either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * NotEnoughUpdates 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with NotEnoughUpdates. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package io.github.moulberry.notenoughupdates.util;
+
+import org.apache.commons.io.IOUtils;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URL;
+import java.nio.file.Files;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionException;
+
+public class NetUtils {
+
+	public static CompletableFuture<File> downloadAsync(URL httpURL, File outputFile) {
+		return CompletableFuture.supplyAsync(() -> {
+			try {
+				try (
+					InputStream from = httpURL.openStream();
+					OutputStream to = Files.newOutputStream(outputFile.toPath());
+				) {
+					IOUtils.copyLarge(from, to);
+				}
+				return outputFile;
+			} catch (IOException e) {
+				throw new CompletionException(e);
+			}
+		});
+	}
+
+}