nodejs 对文件进行 压缩加密和解压缩解密

utils.js

var fs = require('fs');var zlib = require('zlib');var crypto = require('crypto');function geFileList(path) {    var filesList = [];    readFile(path, filesList);    return filesList;}function readFile(path, filesList) {    files = fs.readdirSync(path);    files.forEach(walk);    function walk(file) {        states = fs.statSync(path + '/' + file);        if (states.isDirectory()) {            readFile(path + '/' + file, filesList);        }        else {            var obj = new Object();            obj.size = states.size;            obj.name = file;            obj.path = path + '/' + file;            filesList.push(obj);        }    }}var getFileName = function (path) {    var pathList = path.split("/");    var fileName = pathList[pathList.length - 1];    return fileName;};var getFileContent = function (filePath, cb) {    fs.readFile(filePath, function (err, buf) {        cb(err, buf);    });};var writeFileSync = function (filePath, text) {    fs.writeFileSync(filePath, text);};var writeFileAsync = function (filePath, text, cb) {    fs.writeFile(filePath, text, function (err) {        cb(err);    });};/********************加密解密部分**************************/var consts = {    cryptkey: 'S62rgt9rf!nYS5b3',    iv: "Og'Y6Jm-'i#io9Op"};function util (){}var prot = util.prototype;prot.md5 = function (str) {    var md5sum = crypto.createHash('md5');    md5sum.update(str);    str = md5sum.digest('hex');    return str;};prot.encode = function (content) {    var cipher = crypto.createCipheriv('aes-128-cbc', consts.cryptkey, consts.iv);    cipher.setAutoPadding(true);    var bf = [];    bf.push(cipher.update(content));    bf.push(cipher.final());    return Buffer.concat(bf);};prot.decode = function (content) {    var decipher = crypto.createDecipheriv('aes-128-cbc', consts.cryptkey, consts.iv);    decipher.setAutoPadding(true);    try {        var a = [];        a.push(decipher.update(content));        a.push(decipher.final());        return Buffer.concat(a);    } catch (e) {        console.error('decode error:', e.message);        return null;    }};/**********************压缩解压缩部分************************/function gZip(strText, cb) {    zlib.gzip(strText, function (err, bufData) {        cb(err, bufData);    });}function unZip(buffer, cb) {    zlib.unzip(buffer, function (err, buf) {        cb(err, buf);    });}module.exports = {    "FileUtil": {        "getDirFiles": geFileList,        "getFileName": getFileName,        "writeFileAsync": writeFileAsync,        "writeFileSync": writeFileSync,        "getFileContent": getFileContent    },    "EncodeUtil":util,    "ZipUtil": {        "gZip": gZip,        "unZip": unZip    }};

demo.js

var utils = require('./utils');var async = require('async');var encodeUtil = new utils.EncodeUtil();zipEncode();function zipEncode() {    var fileList = utils.FileUtil.getDirFiles(__dirname + "/jsonFile");    async.each(fileList, function (item, callback) {        var filepath = item.path;        var filename = utils.FileUtil.getFileName(filepath);        utils.FileUtil.getFileContent(filepath, function (err, buf) {            if (!err) {                var bpstr = new Buffer(buf);                utils.ZipUtil.gZip(bpstr, function (err, bufData) {                    var encodeBuffer = encodeUtil.encode(bufData);//fs.readFileSync(curPath)                    var resultPath = __dirname + "/resFile/" + filename;                    utils.FileUtil.writeFileSync(resultPath, encodeBuffer);                    callback(err);                });            } else {                callback(err);            }        });    }, function (err, resp) {        if (err) {            console.log("err :", err);        } else {            console.log("success");            decodeUnzip();        }    });}function decodeUnzip() {    var fileList = utils.FileUtil.getDirFiles(__dirname + "/resFile");    async.each(fileList, function (item, callback) {        var filepath = item.path;        utils.FileUtil.getFileContent(filepath, function (err, buf) {            if (!err) {                var bpstr = new Buffer(buf);                var decodeBuffer = encodeUtil.decode(bpstr);                utils.ZipUtil.unZip(decodeBuffer, function (err, buf) {                    console.log(JSON.parse(buf.toString()));                    callback(err);                });            } else {                callback(err);            }        });    }, function (err, resp) {        if (err) {            console.log("err :", err);        } else {            console.log("success");        }    });}