Simplest way to download and unzip files in Node js cross-platform

Question

Just looking for a simple solution to downloading and unzipping  zip or  tar gz files in Node js on any operating system   Not sure if this is built in or I have to use a separate library   Any ideas   Looking for just a couple lines of code so when the next zip file comes that I want to download in node  it s a no brainer   Feel like this should be easy and or built in  but I can t find anything  Thanks

User · Accepted Answer

Checkout adm-zip   ADM-ZIP is a pure JavaScript implementation for zip data compression for NodeJS      The library allows you to          decompress zip files directly to disk or in-memory buffers    compress files and store them to disk in  zip format or in compressed buffers   update content of add new delete files from an existing  zip

User · Answer

You can simply extract the existing zip files also by using  unzip   It will work for any size files and you need to add it as a dependency from npm    x000D   x000D  fs createReadStream filePath  pipe unzip Extract  path moveIntoFolder    on  close   function    x000D            To do after unzip x000D      callback    x000D        x000D   x000D   x000D

User · Answer

Another working example   var zlib   require  zlib    var tar   require  tar    var ftp   require  ftp     var files        var conn   new ftp    conn on  connect   function e         conn auth function e                 if  e                        throw e                    conn get   tz tzdata-latest tar gz   function e  stream                         stream on  success   function                                  conn end                     console log  Processing files                         for  var name in files                                        var file   files name                        console log  filename      name                       console log file                                     console log  OK                               stream on  error   function e                                 console log  ERROR during get        e                   conn end                                 console log  Reading                     stream              pipe zlib createGunzip                 pipe tar Parse                 on  entry   function  e                                     var filename   e props  path                    console log  filename     filename                   if  files filename     null                                         files filename                                          e on  data   function  c                                         files filename     c toString                                                                   connect 21   ftp iana org

User · Answer

Checkout gunzip-file  import gunzip from  gunzip-file    const unzipAll   async      gt      try       const compFiles   fs readdirSync  tmp       await Promise all compFiles map  async file   gt          if file endsWith   gz             gunzip  tmp   file     tmp   file slice 0  -3                            catch err        console log err

User · Answer

I found success with the following  works with  zip  Simplified here for posting  no error checking  amp  just unzips all files to current folder   function DownloadAndUnzip URL       var unzip   require  unzip        var http   require  http        var request   http get URL  function response            response pipe unzip Extract  path

User · Answer

I was looking forward this for a long time  and found no simple working example  but based on these answers I created the downloadAndUnzip   function    The usage is quite simple   downloadAndUnzip  http   your-domain com archive zip    yourfile xml        then function  data            console log data      unzipped content of yourfile xml in root of archive zip             catch function  err            console error err             And here is the declaration   var AdmZip   require  adm-zip    var request   require  request     var downloadAndUnzip   function  url  fileName                    Download a file                 param url             var download   function  url            return new Promise function  resolve  reject                request                   url  url                  method   GET                   encoding  null                function  err  response  body                    if  err                        return reject err                                     resolve body                                                      Unzip a Buffer                 param buffer         returns  Promise              var unzip   function  buffer            return new Promise function  resolve  reject                 var resolved   false               var zip   new AdmZip buffer               var zipEntries   zip getEntries       an array of ZipEntry records              zipEntries forEach function  zipEntry                    if  zipEntry entryName    fileName                        resolved   true                      resolve zipEntry getData   toString  utf8                                                    if   resolved                    reject new Error  No file found in archive      fileName                                           return download url           then unzip

User · Answer

Node has builtin support for gzip and deflate via the zlib module   var zlib   require  zlib     zlib gunzip gzipBuffer  function err  result        if err  return console error err        console log result         Edit  You can even pipe the data directly through e g  Gunzip  using request    var request   require  request        zlib   require  zlib        fs   require  fs        out   fs createWriteStream  out        Fetch http   example com foo gz  gunzip it and store the results in  out  request  http   example com foo gz   pipe zlib createGunzip    pipe out     For tar archives  there is Isaacs  tar module  which is used by npm   Edit 2  Updated answer as zlib doesn t support the zip format  This will only work for gzip

User · Answer

Download and extract for  tar gz   const https   require  https    const tar   require  tar     https get  https   url to your tar gz   function response      response pipe      tar x         strip  1        C   some-dir

User · Answer

I tried a few of the nodejs unzip libraries including adm-zip and unzip  then settled on extract-zip which is a wrapper around yauzl  Seemed the simplest to implement   https   www npmjs com package extract-zip  var extract   require  extract-zip   extract zipfile    dir  outputPath    function  err          handle err

User · Answer

It s 2017  October 26th  to be exact   For an ancient and pervasive technology such as unzip I would expect there to exist a fairly popular  mature node js unzip library that is  quot stagnant quot  and  quot unmaintained quot  because it is  quot complete quot   However  most libraries appear either to be completely terrible or to have commits recently as just a few months ago  This is quite concerning    so I ve gone through several unzip libraries  read their docs  and tried their examples to try to figure out WTF  For example  I ve tried these   thejoshwolfe yauzl antelle node-stream-zip ZJONSSON node-unzipper EvanOxfeld node-unzip Stuk jszip kriskowal zip  Update 2020  Haven t tried it yet  but there s also archiver Top Recommendation  yauzl Works great for completely downloaded file  Not as great for streaming  Well documented  Works well  Makes sense  2nd Pick  node-stream-zip antelle s node-stream-zip seems to be the best Install  npm install --save node-stream-zip  Usage   use strict    var fs   require  fs    var StreamZip   require  node-stream-zip     var zip   new StreamZip     file     example zip    storeEntries  true      zip on  error   function  err    console error   ERROR    err        zip on  ready   function        console log  All entries read      zip entriesCount       console log zip entries          zip on  entry   function  entry      var pathname   path resolve    temp   entry name     if         test path relative    temp   pathname            console warn  quot  zip warn   ignoring maliciously crafted paths in zip file  quot   entry name         return         if          entry name entry name length - 1         console log   DIR    entry name       return         console log   FILE    entry name     zip stream entry name  function  err  stream        if  err    console error  Error    err toString     return         stream on  error   function  err    console log   ERROR    err   return              example  print contents to screen       stream pipe process stdout           example  save contents to file     fs mkdir        path dirname pathname           recursive  true          function  err            stream pipe fs createWriteStream pathname                              Security Warning  Not sure if this checks entry name for maliciously crafted paths that would resolve incorrectly  such as          foo or  etc passwd   You can easily check this yourself by comparing        test path relative    to dir   path resolve    to dir   entry name     Pros   Why do I think it s the best    can unzip normal files  maybe not some crazy ones with weird extensions  can stream seems to not have to load the whole zip to read entries has examples in normal JavaScript  not compiled  doesn t include the kitchen sink  i e  url loading  S3  or db layers  uses some existing code from a popular library doesn t have too much senseless hipster or ninja-foo in the code  Cons   Swallows errors like a hungry hippo Throws strings instead of errors  no stack traces  zip extract   doesn t seem to work  hence I used zip stream   in my example   Runner up  node-unzipper Install  npm install --save unzipper  Usage   use strict    var fs   require  fs    var unzipper   require  unzipper     fs createReadStream    example zip      pipe unzipper Parse       on  entry   function  entry        var fileName   entry path      var type   entry type      Directory  or  File       console log        if        test fileName           console log   DIR    fileName  type         return             console log   FILE    fileName  type           TODO  probably also needs the security check      entry pipe process stdout  fs createWriteStream  output path              NOTE  To ignore use entry autodrain   instead of entry pipe          Pros   Seems to work in a similar manner to node-stream-zip  but less control A more functional fork of unzip Seems to run in serial rather than in parallel  Cons   Kitchen sink much  Just includes a ton of stuff that s not related to unzipping Reads the whole file  by chunk  which is fine   not just random seeks

User · Answer

yauzl is a robust library for unzipping  Design principles    Follow the spec  Don t scan for local file headers  Read the central directory for file metadata  Don t block the JavaScript thread  Use and provide async APIs  Keep memory usage under control  Don t attempt to buffer entire files in RAM at once  Never crash  if used properly   Don t let malformed zip files bring down client applications who are trying to catch errors  Catch unsafe filenames entries  A zip file entry throws an error if its file name starts with     or   A-Za-z     or if it contains      path segments or      per the spec     Currently has 97  test coverage

[node.js] Simplest way to download and unzip files in Node.js cross-platform?

Examples related to node.js

Examples related to zip