nodejs中使用archive压缩文件的实现代码

前言

archive是一款在nodejs中可以实现跨平台打包的工具

可以将文件压缩为zip或rar格式

是一个比较好用的第三方模块

install

npm install archiver --save

archive github地址：https://github.com/archiverjs/node-archiver

Quick Start

// require modulesvar fs = require('fs');var archiver = require('archiver');// create a file to stream archive data to.var output = fs.createWriteStream(__dirname + '/example.zip');//设置压缩格式为zipvar archive = archiver('zip', {  zlib: { level: 9 } // Sets the compression level.});// listen for all archive data to be written// 'close' event is fired only when a file descriptor is involvedoutput.on('close', function() {  console.log(archive.pointer() + ' total bytes');  console.log('archiver has been finalized and the output file descriptor has closed.');});// This event is fired when the data source is drained no matter what was the data source.// It is not part of this library but rather from the NodeJS Stream API.// @see:  https://nodejs.org/api/stream.html#stream_event_endoutput.on('end', function() {  console.log('Data has been drained');});// good practice to catch this error explicitlyarchive.on('error', function(err) {  throw err;});// pipe archive data to the filearchive.pipe(output);// append a file from streamvar file1 = __dirname + '/file1.txt';archive.append(fs.createReadStream(file1), { name: 'file1.txt' });// append a file from stringarchive.append('string cheese!', { name: 'file2.txt' });// append a file from buffervar buffer3 = Buffer.from('buff it!');archive.append(buffer3, { name: 'file3.txt' });// append a filearchive.file('file1.txt', { name: 'file4.txt' });// append files from a sub-directory and naming it `new-subdir` within the archivearchive.directory('subdir/', 'new-subdir');// append files from a sub-directory, putting its contents at the root of archivearchive.directory('subdir/', false);// append files from a glob patternarchive.glob('subdir/*.txt');// finalize the archive (ie we are done appending files but streams have to finish yet)// 'close', 'end' or 'finish' may be fired right after calling this method so register to them beforehandarchive.finalize();

实际使用

实际使用中情况可能会比较多

需要打包的源文件一般为远程文件，比如某一个第三方的文件存放地址，这时则需要先将第三方文件下载到本地

示例方法，可以根据实际需要修改相应的参数

function download(files){  //下载文件的本地存档地址  //示例 files = [{name: 'xxxx.js',url:'https://xx/xx/xxxx.js'}]  let dirPath = path.resolve(__dirname, '文件存放的本地位置')  mkdir(dirPath);  let tmps = files.map((item,index) => {    let stream = fs.createWriteStream(path.resolve(dirPath, item.name));  return new Promise((resolve,reject)=>{    try {      request(item.url).pipe(stream).on("close", function (err) {        console.log("文件[" + item.name + "]下载完毕");        resolve({          url: path.resolve(dirPath, item.name),          name: item.name        })      });    } catch (e) {      reject(e||'')    }  })});return new Promise((res,rej)=>{  Promise.all(tmps).then((result) => {    console.log(result)    res(result)  }).catch((error) => {    console.log(error||'')  })})}//创建文件夹目录function mkdir(dirPath) {  if (!fs.existsSync(dirPath)) {    fs.mkdirSync(dirPath);    console.log("文件夹创建成功");  } else {    console.log("文件夹已存在");  }}