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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 modules var 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zip var 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 involved output.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_end output.on('end', function() { console.log('Data has been drained'); }); // good practice to catch this error explicitly archive.on('error', function(err) { throw err; }); // pipe archive data to the file archive.pipe(output); // append a file from stream var file1 = __dirname + '/file1.txt'; archive.append(fs.createReadStream(file1), { name: 'file1.txt' }); // append a file from string archive.append('string cheese!', { name: 'file2.txt' }); // append a file from buffer var buffer3 = Buffer.from('buff it!'); archive.append(buffer3, { name: 'file3.txt' }); // append a file archive.file('file1.txt', { name: 'file4.txt' }); // append files from a sub-directory and naming it `new-subdir` within the archive archive.directory('subdir/', 'new-subdir'); // append files from a sub-directory, putting its contents at the root of archive archive.directory('subdir/', false); // append files from a glob pattern archive.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 beforehand archive.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"); } }
将下载到本地的文件打包为一个zip文件,可以参照 Quick Start 中的api组合使用
// append files from a sub-directory, putting its contents at the root of archive archive.directory('subdir/', false); //要注意第二个参数false,这个参数代表打包后的文件相对于output的目录结构,不写这个参数代表按照第一个参数('subdir/')的目录层级
打包之后的文件位置是在本地位置,此时在推送到前端页面中下载url需要组装成http或https的地址
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
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