request + iconv-lite = awesome

crawler.js

import request from 'request';
import iconv from 'iconv-lite';

request
    .get(tb)
    .pipe(iconv.decodeStream('gbk'))
    // Sugar: all encode/decode streams have .collect(cb) method to accumulate data.
    .collect(function (err, body) {
        console.log(body);
    });