Node.js文件编码格式的转换

var fs = require(‘fs‘);
var chardet = require(‘chardet‘);
var jschardet = require("jschardet");
var encoding = require("encoding");

var path = "lua目录"; 

function readDirectory(dirPath) {
    if (fs.existsSync(dirPath)) {
        var files = fs.readdirSync(dirPath);

        files.forEach(function (file) {
            var filePath = dirPath + "/" + file;
            var stats = fs.statSync(filePath);

            if (stats.isDirectory()) {
                // console.log(‘/n读取目录：\n‘, filePath, "\n");
                readDirectory(filePath);
            } else if (stats.isFile() && /\.lua$/.test(filePath)) {
                var buff = fs.readFileSync(filePath);
                if (buff.length && buff[0].toString(16).toLowerCase() == "ef" && buff[1].toString(16).toLowerCase() == "bb" && buff[2].toString(16).toLowerCase() == "bf") {
                    //EF BB BF 239 187 191
                    console.log(‘\n发现BOM文件：‘, filePath, "\n");

                    buff = buff.slice(3);
                    fs.writeFile(filePath, buff.toString(), "utf8");
                }

                // { encoding: ‘UTF-8‘, confidence: 0.99 }
                // var charset = chardet.detectFileSync(filePath);
                var info = jschardet.detect(buff);

                if (info.encoding == "GB2312" || info.encoding == "ascii") {
                    var resultBuffer = encoding.convert(buff, "UTF-8", info.encoding);
                    fs.writeFile(filePath, resultBuffer, "utf8");
                }
                else if (info.encoding != "UTF-8" && chardet.detectFileSync(filePath) != "UTF-8")
                {
                    if (buff.toString().indexOf("\r\n") > -1)
                    {
                        var resultBuffer = encoding.convert(buff, "UTF-8", "GBK");
                        fs.writeFile(filePath, resultBuffer, "utf8");
                    }
                }
            }
        });

    } else {
        console.log(‘Not Found Path : ‘, dirPath);
    }
}

readDirectory(path);