DropboxContentHasher

In order to allow Dropbox apps to verify uploaded contents or compare remote files to local files without downloading them, the FileMetadata object contains a hash of the file contents in the content_hash property.

This gem computes hash value of the file using dropbox algorithm.

Installation

Add this line to your application's Gemfile:

gem 'dropbox_content_hasher'

And then execute:

$ bundle

Or install it yourself as:

$ gem install dropbox_content_hasher

Usage

Here is an example of running the above algorithm on this image of the Milky Way from NASA.

file = Pathname.new('milky-way-nasa.jpg')
DropboxContentHasher.calculate(file)
 => "485291fa0ee50c016982abbfa943957bcd231aae0492ccbaa22c58e3997b35e0"

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/psyipm/dropbox_content_hasher.

License

The gem is available as open source under the terms of the MIT License.