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

Answer 1

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();
    }
  });

Answer 2

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()
});