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bsdiff-nodejs

An binary diff and patch library based on bsdiff algorithm for NodeJS (Windows, Mac, Linux)

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Installation

Install as a dependency for your project (need python 2.x):

npm install --save bsdiff-nodejs

Usage

const bsdiff = require('bsdiff-nodejs');
bsdiff.diff(oldFile, newFile, patchFile, function(result, err) {}); // Async
bsdiff.patch(oldfile, newfile, patchfile, function(result, err) {}); // Async
 
bsdiff.diffSync(oldFile, newFile, patchFile); // Sync
bsdiff.patchSync(oldfile, newfile, patchfile); // Sync

For example:

const fs = require('fs');
const path = require('path');
 
const oldFile = path.join(__dirname, 'resources/react-0.3-stable.zip');
const newFile = path.join(__dirname, 'resources/react-0.4-stable.zip');
const patchFile = path.join(__dirname, 'resources/react.patch');
const generatedFile = path.join(__dirname, 'resources/react-generated.zip');
 
async function asyncCall() {
    await bsdiff.diff(oldFile, newFile, patchFile, function (result) {
        console.log('diff:' + String(result).padStart(4) + '%');
    });
 
    await bsdiff.patch(oldFile, generatedFile, patchFile, function (result) {
        console.log('patch:' + String(result).padStart(4) + '%');
    });
}
  
asyncCall();

License

The original algorithm and implementation was developed by Colin Percival. The algorithm is detailed in his paper, Naïve Differences of Executable Code. For more information, visit his website at http://www.daemonology.net/bsdiff/.

Copyright 2003-2005 Colin Percival
MIT © Exoway