Node cross-platform wrapper for UPX
$ npm install --save-dev https://github.com/kostya-main/upx
import * as UPX from 'upx';
const upx = new UPX.default(file, {best : true} // see options below)
upx.output('Compressed.exe')
.start().then(function(stats){
/* stats:
{ cmd: 'compress',
name: 'Compressed.exe',
fileSize: { before: '1859072', after: '408064' },
ratio: '21.95%',
format: 'win32/pe',
affected: 1 }
*/
}).catch(function (err) {
// ...
})upx(<path>, {options}) : path is the absolute path to the file to compress/decompress.
.output(<output>) : path to the output file.
.start() : Start the compress/decompress process.
The options below can be true or false.
| Option | Description |
|---|---|
faster |
compress faster |
better |
compress better |
best |
compress best (can be slow for big files) |
decompress |
decompress |
list |
list compressed files |
force |
force compression of suspicious files |
lzma |
try LZMA [slower but tighter than NRV] |
brute |
try all available compression methods & filters (slow) |
ultraBrute |
try even more compression variants (very slow) |
overlayCopy |
copy any extra data attached to the file (default) |
overlayStrip |
strip any extra data attached to the file (dangerous) |
overlaySkip |
don't compress a file with an overlay |
8086 |
make compressed sys work on any 8086 (for dos) |
noReloc |
put no relocations in to the exe header (for dos) |
8bit |
uses 8 bit size compression (default: 32 bit) |
8mibRam |
8 megabyte memory limit (default 2MiB) |
Rocco Musolino (@roccomuso)
MIT