JavaScript implementation of IPFS' unixfs (a Unix FileSystem representation on top of a MerkleDAG)

This module contains the protobuf definition of the UnixFS data structure found at the root of all UnixFS DAGs.

The UnixFS spec can be found in the ipfs/specs repository

const data = new UnixFS({ type: 'file' })
data.addBlockSize(256) // add the size of each block
data.addBlockSize(256)
// ...

Creating a directory that contains several files is achieve by creating a unixfs element that identifies a MerkleDAG node as a directory. The links of that MerkleDAG node are the files that are contained in this directory.

const data = new UnixFS({ type: 'directory' })

const data = new UnixFS([options])

options is an optional object argument that might include the following keys:

• type (string, default file): The type of UnixFS entry. Can be:
  • raw
  • directory
  • file
  • metadata
  • symlink
  • hamt-sharded-directory
• data (Uint8Array): The optional data field for this node
• blockSizes (Array, default: []): If this is a file node that is made up of multiple blocks, blockSizes is a list numbers that represent the size of the file chunks stored in each child node. It is used to calculate the total file size.
• mode (Number, default 0644 for files, 0755 for directories/hamt-sharded-directories) file mode
• mtime (Date, { secs, nsecs }, { Seconds, FractionalNanoseconds }, [ secs, nsecs ]): The modification time of this node

data.addBlockSize(<size in bytes>)

data.removeBlockSize(<index>)

data.fileSize() // => size in bytes

const marshaled = data.marshal()
const unmarshaled = Unixfs.unmarshal(marshaled)

const dir = new Data({ type: 'directory' })
dir.isDirectory() // true

const file = new Data({ type: 'file' })
file.isDirectory() // false

If no modification time has been set, no mtime property will be present on the Data instance:

const file = new Data({ type: 'file' })
file.mtime // undefined

Object.prototype.hasOwnProperty.call(file, 'mtime') // false

const dir = new Data({ type: 'dir', mtime: new Date() })
dir.mtime // { secs: Number, nsecs: Number }

$ npm i ipfs-unixfs

Loading this module through a script tag will make its exports available as IpfsUnixfs in the global namespace.

<script src="https://unpkg.com/ipfs-unixfs/dist/index.min.js"></script>

• https://ipfs.github.io/js-ipfs-unixfs/modules/ipfs_unixfs.html

Licensed under either of

• Apache 2.0, (LICENSE-APACHE / http://www.apache.org/licenses/LICENSE-2.0)
• MIT (LICENSE-MIT / http://opensource.org/licenses/MIT)

Contributions welcome! Please check out the issues.

Also see our contributing document for more information on how we work, and about contributing in general.

Please be aware that all interactions related to this repo are subject to the IPFS Code of Conduct.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.