Node.js read a file in a zip without unzipping it

Question

I have a zip file (actually it's an epub file) I need to loop through the files in it and read them without unzipping them to the disk.

I tried to use a Node.js library called JSZip but the content of each file is stored in memory in Buffer and whenever I try to decode the buffer content to string the content returned is unreadable

Here's the code I tried:

const zip = new JSZip();   // read a zip file     fs.readFile(epubFile, function (err, data) {         if (err) throw err;         zip.loadAsync(data).then(function (zip) {             async.eachOf(zip.files, function (content, fileName, callback) {                 if (fileName.match(/json/)) {                     var buf = content._data.compressedContent;                     console.log(fileName);                     console.log((new Buffer(buf)).toString('utf-8'));                 }                 callback();             }, function (err) {                 if (err) {                     console.log(err);                 }             });         });     }); 

Answer 1

Since unzip seems to be abandoned, I used node-stream-zip with pretty good success.

npm install node-stream-zip 

Reading files be all like:

const StreamZip = require('node-stream-zip'); const zip = new StreamZip({     file: 'archive.zip',     storeEntries: true });  zip.on('ready', () => {     // Take a look at the files     console.log('Entries read: ' + zip.entriesCount);     for (const entry of Object.values(zip.entries())) {         const desc = entry.isDirectory ? 'directory' : `${entry.size} bytes`;         console.log(`Entry ${entry.name}: ${desc}`);     }      // Read a file in memory     let zipDotTxtContents = zip.entryDataSync('path/inside/zip.txt').toString('utf8');     console.log("The content of path/inside/zip.txt is: " + zipDotTxtContents);      // Do not forget to close the file once you're done     zip.close() }); 

Answer 2

npm install unzip 

https://www.npmjs.com/package/unzip

    fs.createReadStream('path/to/archive.zip')   .pipe(unzip.Parse())   .on('entry', function (entry) {     var fileName = entry.path;     var type = entry.type; // 'Directory' or 'File'      var size = entry.size;     if (fileName === "this IS the file I'm looking for") {       entry.pipe(fs.createWriteStream('output/path'));     } else {       entry.autodrain();     }   });