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dat-deep-link

An experiment to define an URI scheme that uses hypercore-strong-link for creating links that pin files to a version.

Installation

$ npm install dat-deep-link

URI Format

The URI format extends a traditional DAT link by including the root hash of the merkle tree of the metadata hypercore feed at the current version of the archive. The version is included along with the pathspec that points to the file in the archive.

dat://[tree-hash@]dat-key[:dat-version][/pathspec]

where

• tree-hash is the root hash of the merkle tree for the metadata feed. Optional
• dat-key is the public key for the DAT archive. Required at dat-version Optional
• dat-version is the version of the DAT archive that should be checked out and verified against Optional
• pathspec is the file or directory that should be verified. Optional

Usage

link.generate(drive, '/path/to/file', (err, uri) => {
  link.resolve(drive, uri, (err, checkout, filename) => {
    // do something with drive checkout and filename in uri
  })
})

API

link.generate(drive, filename, callback)

Generate a URI for filename in drive at drive.version (normalized for hyperdrive@10) calling callback(err, uri) where uri is the generated DAT deep link.

link.generate(drive, 'hello.txt', (err, uri) => {
  console.log(uri) // 'dat://...'
})

link.resolve(drive, uri, callback)

Resolve and verify uri against drive calling callback(err, checkout, filename, verified) where checkout is a hyperdrive instance checked out at the version specified in uri, filename is the pathspec specified in the uri, and verified is a boolean indicating if the uri was verified.

const uri = 'dat://e8c2360201afe4acdcee01841179992864564b40bcb23aeb78dd7ba258780d14@0f3a764c72f5a08ea42006b881d923fd5baba9b516bda22e79ca43735c7f6c3f:1/hello.txt'
link.resolve(drive, uri, (err, checkout, filename, verified) => {
  if (verified) {
    checkout.readFile(filename, console.log)
  }
})

License

MIT