a gbk to utf8 dictionary and tool for converting gbk buffer to utf-8 string
http://saighost.github.com/node-gbk-dict
npm install gbk-dict
var dict = require('gbk-dict').init();
dict.gbkToUTF8(buf);
var dict = require('gbk-dict').init();
var fs = require('fs');
fs.readFile('./gbk-test.txt', function (err, data) {
if(err) throw err;
console.log(dict.gbkToUTF8(data));
});