carrierwave

https://github.com/jnicklas/carrierwave

Ruby

Classier solution for file uploads for Rails, Sinatra and other Ruby web frameworks

CarrierWave::Validations::ActiveModel::HelperMethods#validates_download_of

Makes the record invalid if the remote file couldn't be downloaded

Accepts the usual parameters for validations in Rails (:if, :unless, etc...)

Source | Google | Stack overflow

Edit

git clone [email protected]:jnicklas/carrierwave.git

cd carrierwave

open lib/carrierwave/validations/active_model.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-CarrierWave--Validations--ActiveModel--HelperMethods-validates_download_of-for-pr

# Commit to git

git add lib/carrierwave/validations/active_model.rbgit commit -m "better docs for CarrierWave::Validations::ActiveModel::HelperMethods#validates_download_of"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-CarrierWave--Validations--ActiveModel--HelperMethods-validates_download_of-for-pr

hub pull-request

# Celebrate!