随机生成游戏用户昵称（nodejs版本）（含机器人头像，金币等）

var nickNameArr = [];

function initNickName(){

    var dirname =__dirname;
    var nickname00 = fs.readFileSync(dirname+"/res/nickname00.txt","utf-8");

    //把换行的都全局替换成空格，然后按空格分割为数组
    var rn00 = nickname00.replace(/\r\n/g," ");
    var nameArr00 = rn00.split(' ');

    nickNameArr = [].concat(nameArr00);

    console.log("nickNameArr length=",nickNameArr.length);
}

function genName(){

    var name = "";
    var len =nickNameArr.length;
    if(len > 0){
        var pos = Math.floor(Math.random()*len);
        name = nickNameArr[pos];
        if(name.length == 0){ //防止拿到空白值，正常情况不会出现
            genName();
        }
    }

    return name;
}

//nickname00文本格式为每个昵称中间空一格或者换行，例子如下：
昵称1 昵称2 昵称3
nk1 nk2
nk3
昵称x
nk4

function genHeadimg(){

    var url_img = "";

    var path = "./public/images/headImages/";
    //实际使用用域名，内部测试ip如下
    var ip = "127.0.0.1";
    //如果有端口就写，如果没有，跳过
    var port = "8888";
    var path_link = "http://"+ip + ":" + port + "/public/images/headImages/";

    var files = fs.readdirSync(path);

    var len = files.length;
    var randNum = Math.floor(Math.random()*len);
    var url_img = path_link + files[randNum];
    console.log("genHeadimg rand link=",url_img);

    return url_img;
}