unzip multiple files with nodejs and StreamZip - node.js

Question

i am trying to unzip multiple files using NodeJs and StreamZip. this is what i am trying:
export const unpackZip = async (folder: string) => {
const zipPath = await getFilesByExtension(folder, ".zip").then((zipFile)=>{console.log("ZIPFILE", zipFile)
return zipFile})
console.log("DEBUG PATH: ", zipPath)
let zip: StreamZip
await Promise.all(zipPath.map((zipFile) => {
return new Promise<string>((resolve, reject) => {
zip = new StreamZip({ storeEntries: true, file: `${folder}/${zipFile}` });
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) {
const pathname = path.resolve('./tmp', entry.name);
if (/\.\./.test(path.relative('./tmp', pathname))) {
console.warn("[zip warn]: ignoring maliciously crafted paths in zip file:", entry.name);
return;
}
if ('/' === entry.name[entry.name.length - 1]) {
console.log('[DIR]', entry.name);
return;
}
zip.extract(entry, `tmp/${entry.name}`, (err?: string, res?: number | undefined) => {
resolve(entry.name)
})
})
})
}))
};
the problem is, that it does indeed go through all the zip files in the folder (getFilesByExtension returns an array of filename strings like [asdf.zip, asdf1.zip, ... ])
but the actual filecontent from all unpacked zips is from the first zip. a Screenshot may say more than i can:
can someone spot the problem in the code?! i am kind of clueless where the issue could be :/
any help would be awesome!! Thanks!!

Answer 1

Never mind... i cannot use map here - if i use a for loop and await my new Promise it works:
for (const zipFile of zipPath) {
await new Promise<string>((resolve, reject) => {
zip = new StreamZip({ storeEntries: true, file: `${folder}/${zipFile}` });
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) {
const pathname = path.resolve('./tmp', entry.name);
if (/\.\./.test(path.relative('./tmp', pathname))) {
console.warn("[zip warn]: ignoring maliciously crafted paths in zip file:", entry.name);
return;
}
if ('/' === entry.name[entry.name.length - 1]) {
console.log('[DIR]', entry.name);
return;
}
zip.extract(entry, `tmp/${entry.name}`, (err?: string, res?: number | undefined) => {
resolve(entry.name)
})
})
})
}