截取buffer字符串

let buffer = new Buffer('abc\r\nddasdfafd\r\ndfaerewtwert');
function bufferSplite(buffer, delimiter){
let arr = [];
let n = 0;
while((n=buffer.indexOf(delimiter))!=-1){
arr.push(buffer.slice(0, n));
buffer=buffer.slice(n+delimiter.length);
};
arr.push(buffer);
return arr;
}
console.log(bufferSplite(buffer,'\r\n').map(b=>b.toString()));