This is an implementation of Compound Binary File v.3
Allows reading existing files, creation of the/write operation
To parse existing Compound Binary File:
const {CompoundFile} = require('compound-binary-file-js'); const reader = new FileReader(); reader.onload = () => { const arrayBuffer = reader.result; const cfb = CompoundFile.fromUint8Array(new Uint8Array(arrayBuffer)); const rootStorage = cfb.getRootStorage(); const subStorages = rootStorage.storages(); const subStreams = rootStorage.streams(); // etc. }; reader.readAsArrayBuffer(input.files[0]);Or alternatively you may use the following syntax if you read file as number[]:
var cfb = CompoundFile.fromUint8Array([...arrayOfBytes]); To create new Compound File:
const {CompoundFile} = require('compound-binary-file-js'); const cfb = CompoundFile.empty(); const storage1 = cfb.getRootStorage().addStorage('storage1'); const stream1 = storage1.addStream('stream1', [1,2,3,4]); const fileBytes = cfb.asBytes();