From c2405a882cff5c65196018c0dae215e71247b68c Mon Sep 17 00:00:00 2001
From: Anuken <arnukren@gmail.com>
Date: Sat, 12 Oct 2024 22:16:37 -0400
Subject: [PATCH] Added fallback URLs for server list

---
 core/src/mindustry/Vars.java                  |  4 ++--
 core/src/mindustry/ui/dialogs/JoinDialog.java | 20 +++++++++++++++----
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/core/src/mindustry/Vars.java b/core/src/mindustry/Vars.java
index 2eb0e16ca5..c838f55c15 100644
--- a/core/src/mindustry/Vars.java
+++ b/core/src/mindustry/Vars.java
@@ -72,9 +72,9 @@ public class Vars implements Loadable{
     /** URL the links to the wiki's modding guide.*/
     public static final String modGuideURL = "https://mindustrygame.github.io/wiki/modding/1-modding/";
     /** URL to the JSON file containing all the BE servers. Only queried in BE. */
-    public static final String serverJsonBeURL = "https://raw.githubusercontent.com/Anuken/MindustryServerList/master/servers_be.json";
+    public static final String[] serverJsonBeURLs = {"https://raw.githubusercontent.com/Anuken/MindustryServerList/master/servers_be.json", "https://cdn.jsdelivr.net/gh/anuken/mindustryserverlist/servers_be.json"};
     /** URL to the JSON file containing all the stable servers.  */
-    public static final String serverJsonURL = "https://raw.githubusercontent.com/Anuken/MindustryServerList/master/servers_v8.json";
+    public static final String[] serverJsonURLs = {"https://raw.githubusercontent.com/Anuken/MindustryServerList/master/servers_v8.json", "https://cdn.jsdelivr.net/gh/anuken/mindustryserverlist/servers_v8.json"};
     /** URL of the github issue report template.*/
     public static final String reportIssueURL = "https://github.com/Anuken/Mindustry/issues/new?labels=bug&template=bug_report.md";
     /** list of built-in servers.*/
diff --git a/core/src/mindustry/ui/dialogs/JoinDialog.java b/core/src/mindustry/ui/dialogs/JoinDialog.java
index b0912c7b9c..f6e4191c7b 100644
--- a/core/src/mindustry/ui/dialogs/JoinDialog.java
+++ b/core/src/mindustry/ui/dialogs/JoinDialog.java
@@ -631,12 +631,24 @@ public class JoinDialog extends BaseDialog{
             Core.settings.remove("server-list");
         }
 
-        var url = Version.type.equals("bleeding-edge") || Vars.forceBeServers ? serverJsonBeURL : serverJsonURL;
-        Log.info("Fetching community servers at @", url);
+        var urls = Version.type.equals("bleeding-edge") || Vars.forceBeServers ? serverJsonBeURLs : serverJsonURLs;
+
+        fetchServers(urls, 0);
+    }
+
+    private void fetchServers(String[] urls, int index){
+        if(index >= urls.length) return;
 
         //get servers
-        Http.get(url)
-        .error(t -> Log.err("Failed to fetch community servers", t))
+        Http.get(urls[index])
+        .error(t -> {
+            if(index < urls.length - 1){
+                //attempt fetching from the next URL upon failure
+                fetchServers(urls, index + 1);
+            }else{
+                Log.err("Failed to fetch community servers", t);
+            }
+        })
         .submit(result -> {
             Jval val = Jval.read(result.getResultAsString());
             Seq<ServerGroup> servers = new Seq<>();