Haproxy 可以加载 socket.http.module，但是无法找到 'socket.http'

我已经安装了 luasocket

Lua 5.3.1 版权所有 (C) 1994-2015 Lua.org，PUC-Rio
> require("socket.http")
table: 0x9b2d80
>

debian：/usr/local/share/lua/5.3/socket# ll
total 56
-rw-r--r-- 1 root root 10640 Dec 22 17:47 ftp.lua
-rw-r--r-- 1 root root  3698 Dec 22 17:47 headers.lua
-rw-r--r-- 1 root root 13216 Dec 22 17:47 http.lua
-rw-r--r-- 1 root root  8074 Dec 22 17:47 smtp.lua
-rw-r--r-- 1 root root  3766 Dec 22 17:47 tp.lua
-rw-r--r-- 1 root root 11105 Dec 22 17:47 url.lua

在 Haproxy Lua 代码中：

local http = require("socket.http")

当我请求网页时，

运行时错误: /etc/haproxy/waf/lib.lua:7: module 'socket.http' not found:#012#011no field package.preload['socket.http']#012#011no file '/usr/local/share/lua/5.3/socket/http.lua'#012#011no file '/usr/local/share/lua/5.3/socket/http/init.lua'#012#011no file '/usr/local/lib/lua/5.3/socket/http.lua'#012#011no file '/usr/local/lib/lua/5.3/socket/http/init.lua'#012#011no file '/usr/share/lua/5.3/socket/http.lua'#012#011no file '/usr/share/lua/5.3/socket/http/init.lua'#012#011no file './socket/http.lua'#012#011no file './socket/http/init.lua'#012#011no file '/etc/haproxy/waf/socket/http.lua'#012#011no file '/etc/haproxy/waf/socket/http.lua'#012#011no file '/usr/local/lib/lua/5.3/socket/http.so'#012#011no file '/usr/lib/x86_64-linux-gnu/lua/5.3/socket/http.so'#012#011no file '/usr/lib/lua/5.3/socket/http.so'#012#011no file '/usr/local/lib/lua/5.3/loadall.so'#012#011no file './socket/http.so'#012#011no file '/usr/local/lib/lua/5.3/socket.so'#012#011no file '/usr/lib/x86_64-linux-gnu/lua/5.3/socket.so'#012#011no file '/usr/lib/lua/5.3/socket.so'#012#011no file '/usr/lo

谁能帮我，谢谢。