使用 resty cli 时出现错误：找不到“resty.http”模块

我在测试使用 resty cli 的示例代码时遇到了问题。 请查看相关命令的输出：

$ which resty
/usr/local/bin/resty
$ which openresty
/usr/local/bin/openresty
$ resty -e 'ngx.say("hello world")'
hello world

文件：test.lua

local http = require "resty.http"
local httpc = http.new()
local res, err = httpc:request_uri("http://example.com/helloworld", {
  method = "POST",
  body = "a=1&b=2",
  headers = {
    ["Content-Type"] = "application/x-www-form-urlencoded",
  },
  keepalive_timeout = 60000,
  keepalive_pool = 10
})

if not res then
  ngx.say("failed to request: ", err)
  return
end

使用 resty cli 运行此 test.lua 文件时，我遇到了“找不到”resty.http“模块”的问题：

$ resty test.lua
ERROR: test.lua:1: module 'resty.http' not found:
        no field package.preload['resty.http']
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/site/lualib/resty/http.ljbc'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/site/lualib/resty/http/init.ljbc'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/lualib/resty/http.ljbc'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/lualib/resty/http/init.ljbc'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/site/lualib/resty/http.lua'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/site/lualib/resty/http/init.lua'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/lualib/resty/http.lua'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/lualib/resty/http/init.lua'
        no file './resty/http.lua'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/luajit/share/luajit-2.1.0-beta3/resty/http.lua'
        no file '/usr/local/share/lua/5.1/resty/http.lua'
        no file '/usr/local/share/lua/5.1/resty/http/init.lua'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/luajit/share/lua/5.1/resty/http.lua'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/luajit/share/lua/5.1/resty/http/init.lua'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/site/lualib/resty/http.so'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/lualib/resty/http.so'
        no file './resty/http.so'
        no file '/usr/local/lib/lua/5.1/resty/http.so'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/luajit/lib/lua/5.1/resty/http.so'
        no file '/usr/local/lib/lua/5.1/loadall.so'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/site/lualib/resty.so'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/lualib/resty.so'
        no file './resty.so'
        no file '/usr/local/lib/lua/5.1/resty.so'
        no file '/usr/local/Cellar/openresty/1.19.3.1_1/luajit/lib/lua/5.1/resty.so'
        no file '/usr/local/lib/lua/5.1/loadall.so'
stack traceback:
        test.lua:1: in function 'file_gen'
        init_worker_by_lua:45: in function <init_worker_by_lua:43>
        [C]: in function 'xpcall'
        init_worker_by_lua:52: in function <init_worker_by_lua:50>

我尝试过已安装 openresty 的情况下安装 resty.http。