From b957ca1931793d1288308b2984e83bd9e9059b54 Mon Sep 17 00:00:00 2001
From: huanghongxun <i@huangyuhui.net>
Date: Wed, 8 Apr 2020 21:17:21 +0800
Subject: [PATCH] fix: cannot download library when .pack.xz responded not 404

---
 .../java/org/jackhuang/hmcl/util/io/NetworkUtils.java  | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/util/io/NetworkUtils.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/util/io/NetworkUtils.java
index 539af8517..13e22294d 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/util/io/NetworkUtils.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/util/io/NetworkUtils.java
@@ -214,11 +214,11 @@ public final class NetworkUtils {
     }
 
     public static boolean urlExists(URL url) throws IOException {
-        try (InputStream stream = url.openStream()) {
-            return true;
-        } catch (FileNotFoundException e) {
-            return false;
-        }
+        HttpURLConnection con = createConnection(url);
+        con = resolveConnection(con);
+        int responseCode = con.getResponseCode();
+        con.disconnect();
+        return responseCode / 100 == 2;
     }
 
     // ==== Shortcut methods for encoding/decoding URLs in UTF-8 ====