用lua写一个手机端控制微信自动回复的程序

以下是一个使用Lua写的手机端控制微信自动回复的程序示例：

local http = require("socket.http")
local ltn12 = require("ltn12")
local json = require("json")

-- 获取access_token
function getAccessToken(appId, appSecret)
    local url = string.format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=%s&secret=%s", appId, appSecret)
    local response_body = {}
    local result, status = http.request{
        url = url,
        method = "GET",
        sink = ltn12.sink.table(response_body)
    }
    if status == 200 then
        local response = table.concat(response_body)
        local data = json.decode(response)
        return data.access_token
    else
        return nil
    end
end

-- 设置自动回复
function setAutoReply(accessToken, keywords, replyContent)
    local url = "https://api.weixin.qq.com/cgi-bin/auto_reply/set_reply?access_token=" .. accessToken
    local requestBody = {
        is_add_friend_reply_open = 1,
        is_autoreply_open = 1,
        add_friend_autoreply_info = {
            type = "text",
            content = replyContent
        },
        message_default_autoreply_info = {
            type = "text",
            content = replyContent
        },
        keyword_autoreply_info = {
            list = {
                {
                    keyword_list = keywords,
                    reply_list = {
                        {
                            type = "text",
                            content = replyContent
                        }
                    }
                }
            }
        }
    }
    local request_body = json.encode(requestBody)
    local response_body = {}
    local result, status = http.request{
        url = url,
        method = "POST",
        headers = {
            ["Content-Type"] = "application/json",
            ["Content-Length"] = tostring(#request_body)
        },
        source = ltn12.source.string(request_body),
        sink = ltn12.sink.table(response_body)
    }
    if status == 200 then
        return true
    else
        return false
    end
end

-- 主程序入口
function main()
    local appId = "YourAppId"
    local appSecret = "YourAppSecret"
    local accessToken = getAccessToken(appId, appSecret)
    if accessToken then
        local keywords = {"hello", "hi"}
        local replyContent = "您好，我是自动回复的消息。"
        local success = setAutoReply(accessToken, keywords, replyContent)
        if success then
            print("自动回复设置成功！")
        else
            print("自动回复设置失败！")
        end
    else
        print("获取access_token失败！")
    end
end

main()

请注意，该程序需要依赖Lua的socket.http和ltn12库以及第三方的json库。你可以通过Lua的包管理器（如luarocks）来安装这些依赖库。另外，你需要替换代码中的"YourAppId"和"YourAppSecret"为你自己的微信应用的AppID和AppSecret。

这个程序通过调用微信开放平台的API来设置自动回复的内容。你可以根据自己的需求修改关键词和回复内容