PaperMC/CraftBukkit-Patches/0130-Safer-JSON-Loading.patch

From c9dd26c427b456a1ddfb9a7c4ed82f3e38af69dc Mon Sep 17 00:00:00 2001
From: Suddenly <suddenly@suddenly.coffee>
Date: Tue, 8 Jul 2014 09:44:18 +1000
Subject: [PATCH] Safer JSON Loading


diff --git a/src/main/java/net/minecraft/server/JsonList.java b/src/main/java/net/minecraft/server/JsonList.java
index f5c3aae..8e4ecfd 100644
--- a/src/main/java/net/minecraft/server/JsonList.java
+++ b/src/main/java/net/minecraft/server/JsonList.java
@@ -170,6 +170,17 @@ public class JsonList<K, V extends JsonListEntry<K>> {
         try {
             bufferedreader = Files.newReader(this.c, Charsets.UTF_8);
             collection = (Collection) this.b.fromJson(bufferedreader, JsonList.f);
+        // Spigot Start
+        } catch ( java.io.FileNotFoundException ex )
+        {
+            org.bukkit.Bukkit.getLogger().log( java.util.logging.Level.INFO, "Unable to find file {0}, creating it.", this.c );
+        } catch ( com.google.gson.JsonSyntaxException ex )
+        {
+            org.bukkit.Bukkit.getLogger().log( java.util.logging.Level.WARNING, "Unable to read file {0}, backing it up to {0}.backup and creating new copy.", this.c );
+            File backup = new File( this.c + ".backup" );
+            this.c.renameTo( backup );
+            this.c.delete();
+        // Spigot End
         } finally {
             IOUtils.closeQuietly(bufferedreader);
         }
diff --git a/src/main/java/net/minecraft/server/UserCache.java b/src/main/java/net/minecraft/server/UserCache.java
index b8cde5d..441d1bc 100644
--- a/src/main/java/net/minecraft/server/UserCache.java
+++ b/src/main/java/net/minecraft/server/UserCache.java
@@ -190,6 +190,11 @@ public class UserCache {
                 break label64;
             } catch (FileNotFoundException filenotfoundexception) {
                 ;
+            // Spigot Start
+            } catch (com.google.gson.JsonSyntaxException ex) {
+                JsonList.a.warn( "Usercache.json is corrupted or has bad formatting. Deleting it to prevent further issues." );
+                this.g.delete();
+            // Spigot End
             } finally {
                 IOUtils.closeQuietly(bufferedreader);
             }
-- 
2.1.0