Books: Limit the size of books

Really large books just waste hard drive space and the engine is not designed to
handle that much data in item metadata, this can cause strange things to happen.

diff --git a/mods/default/craftitems.lua b/mods/default/craftitems.lua
index 1500a3461a0b2cf6e52478465635c63d5a0b4194..eda52f51119266d69330901afaf4f6ff24a9cb48 100644 (file)
--- a/mods/default/craftitems.lua
+++ b/mods/default/craftitems.lua
@@ -75,6 +75,7 @@ local function book_on_use(itemstack, user)
        return itemstack
 end
 
+local max_text_size = 10000
 minetest.register_on_player_receive_fields(function(player, formname, fields)
        if formname ~= "default:book" then return end
        local inv = player:get_inventory()
@@ -103,8 +104,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
                data.title = fields.title
                data.owner = player:get_player_name()
                data.description = "\""..fields.title.."\" by "..data.owner
-               data.text = fields.text
-               data.text_len = #data.text
+               data.text = fields.text:sub(1, max_text_size)
                data.page = 1
                data.page_max = math.ceil((#data.text:gsub("[^\n]", "") + 1) / lpp)