[OPQBot插件]获取指定的Minecraft服务器信息.lua

-- 查询指定Minecraft服务器当前的信息
-- 依赖: json,http
function motd(Domain)
    -- 支持 域名:端口 语法
    if (string.find(Domain, ':') ~= nil) then -- 当检测到冒号时，就做额外的词法解析，拆分端口和域名
        Server = split(Domain, ':')[1]
        prot = split(Domain, ':')[2]
    else
        -- 设置在未填写端口时
        Server = Domain
        prot = 25565
    end
    -- 对API发起请求
    response, error_message = http.request("GET", "https://mcapi.us/server/status", {
        query = string.format("ip=" .. Server .. "&port=" .. prot)
    })
    -- 处理json数据，处理转义
    ServerInfoObj = json.decode(response.body)
    -- 对获取失败的情况做出反应
    if (ServerInfoObj.status == "success") then
        -- 处理玩家列表,用于在末尾显示
        if (ServerInfoObj.players.now ~= 0) then
            PlayList = ServerInfoObj.players.sample[1].name
            for i = 2, #ServerInfoObj.players.sample do 
                PlayList = PlayList .. "," .. ServerInfoObj.players.sample[i].name
            end
        else
            PlayList = ""   -- 避免出现问题的else分支
        end
        return
            "ip: " .. Domain ..
            "\n版本: " .. ServerInfoObj.server.name ..
            "\n验证模式: " .. ((ServerInfoObj.online == true) and "联机" or "离线") .. "验证" ..
            "\nmotd: " .. ServerInfoObj.motd ..
            "\n最大玩家: " .. ServerInfoObj.players.max..
            "\n" .. ServerInfoObj.players.now .. "名玩家在线: " .. PlayList
    else
        return "查询 ".. Domain .." 失败，以下是失败原因:\n" .. ServerInfoObj.error
    end
end