Best way to treat string in nodejs

I'm working on an application using a socket for an application on my server. I'm having difficulty handling the calls generated by the net module.

My application is in real time, that is, every 200ms I send a request to the socket so that it can return some information to me, but sometimes it is necessary to make other calls and so my life gets complicated to handle these answer strings.

What I'm doing now is treating the string with the javascript "split" function, but I'd like to know if there is a more intuitive way to do this.

Follow the code:

mvcp.on("data", function(chunk) {
//console.log(chunk)
split_tempos = "";
index = "";
total_index = "";
allchunk = chunk;
str = allchunk.toString();

//pra verificar se é um list ou um usta
split_verify = str.split('\n');
if(!parseInt(split_verify[1])){
    if (!(str.indexOf("202 OK") > -1) && !(str.indexOf("201 OK") > -1)) {
        split_todos = str.split(" ");
        split_nome = str.split("\"");
        split_dados = split_nome[2];
        split_playlist_info = split_nome[4];
        if (typeof split_dados != 'undefined' && split_playlist_info != '' && typeof split_playlist_info != 'undefined') 
        {

            split_playlist_info = split_playlist_info.split(" ");
            index = split_playlist_info[7];
            if(typeof index != 'undefined'){
                if (typeof split_dados != 'undefined'){
                    index = index.split('\r');
                    index = index[0];
                    index_global = index;
                }
            }               
            total_pl = split_playlist_info[6];
        }
        if (typeof split_dados != 'undefined') {
            split_tempos = split_dados.split(" ");

        }
        var JSONresponse = {};
        JSONresponse.data = [];
        var nome = split_nome[1];
        var tamanho;
        if(typeof nome != 'undefined'){
            nome = nome.split("/");
            tamanho = nome.length - 1;
        }else
        {
            nome = "";
        }
        console.log(nome);
        JSONresponse.data.push({
            status: split_todos[1],
            filename: split_nome[1],
            nome:nome[tamanho],
            position: split_tempos[1],
            fps:split_tempos[3],
            inpoint:split_tempos[4],
            outpoint:split_tempos[5],
            length:split_tempos[6],
            b_filename: split_todos[3]
        });
        str = JSON.stringify(JSONresponse);
        io.sockets.emit("incomingMessage", str);
    }

}else
{
    list = str.split('\n');

    var dados = [];
    for(i = 2; i < (list.length -2); i++)
    {
        var dados_completos = "";
        var dados_movie = "";
        var pl_item = list[i].split("\"");

        var index = pl_item[0];
        var nome = pl_item[1];
        dados_completos = pl_item[2];
        if(typeof dados_completos != 'undefined'){
            dados_movie = dados_completos.split(' ');
            inpoint = dados_movie[3];
            outpoint = dados_movie[4];
            real_length = dados_movie[5];
            calculated_length = dados_movie[6];
        }

        var data = {index: index,index_current: index_global, nome: nome, inpoint: inpoint, outpoint: outpoint, real_length: real_length, calculated_length: calculated_length};

        dados.push(data);

    }

    io.sockets.emit("list", dados);


}

});