From e7875772c3d38a9ef46d168cad323488980d69f6 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Sat, 13 May 2017 20:11:21 -0500
Subject: [PATCH] Add system property to disable book size limits

If anyone comes in with a watchdog crash related to books after this patch
you will not only be publicly shamed but also made an example of.

Disables the security limits on books entirely, allowing plugins AND players
to make books with as much data as they want. Do not use this without
limiting incoming data from packets in some other way.

diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBook.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBook.java
index fe8e6dcb77..f8a3c9718d 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBook.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaBook.java
@@ -36,6 +36,7 @@ public class CraftMetaBook extends CraftMetaItem implements BookMeta {
     static final int MAX_PAGES = 50;
     static final int MAX_PAGE_LENGTH = 320; // 256 limit + 64 characters to allow for psuedo colour codes
     static final int MAX_TITLE_LENGTH = 32;
+    private static final boolean OVERRIDE_CHECKS = Boolean.getBoolean("disable.book-limits"); // Paper - Add override
 
     protected String title;
     protected String author;
@@ -198,7 +199,7 @@ public class CraftMetaBook extends CraftMetaItem implements BookMeta {
         if (title == null) {
             this.title = null;
             return true;
-        } else if (title.length() > MAX_TITLE_LENGTH) {
+        } else if (title.length() > MAX_TITLE_LENGTH && !OVERRIDE_CHECKS) { // Paper - Add override
             return false;
         }
 
@@ -238,7 +239,7 @@ public class CraftMetaBook extends CraftMetaItem implements BookMeta {
             throw new IllegalArgumentException("Invalid page number " + page + "/" + pages.size());
         }
 
-        String newText = text == null ? "" : text.length() > MAX_PAGE_LENGTH ? text.substring(0, MAX_PAGE_LENGTH) : text;
+        String newText = text == null ? "" : text.length() > MAX_PAGE_LENGTH && !OVERRIDE_CHECKS ? text.substring(0, MAX_PAGE_LENGTH) : text;
         pages.set(page - 1, CraftChatMessage.fromString(newText, true)[0]);
     }
 
@@ -252,13 +253,13 @@ public class CraftMetaBook extends CraftMetaItem implements BookMeta {
     @Override
     public void addPage(final String... pages) {
         for (String page : pages) {
-            if (this.pages.size() >= MAX_PAGES) {
+            if (this.pages.size() >= MAX_PAGES && !OVERRIDE_CHECKS) {
                 return;
             }
 
             if (page == null) {
                 page = "";
-            } else if (page.length() > MAX_PAGE_LENGTH) {
+            } else if (page.length() > MAX_PAGE_LENGTH && !OVERRIDE_CHECKS) { // Paper - Add override
                 page = page.substring(0, MAX_PAGE_LENGTH);
             }
 
-- 
2.21.0