compound-binary-file-js
v1.0.12
Published
This is an implementation of [Compound Binary File v.3](https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-cfb/53989ce4-7b05-4f8d-829b-d08d6148375b) \ Allows reading existing files, creation of the/write operation
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This is an implementation of Compound Binary File v.3
Allows reading existing files, creation of the/write operation
Usage
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();