carrierwave

https://github.com/carrierwaveuploader/carrierwave

Ruby

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

Mail::Encodings.b_value_encode

Encode a string with Base64 Encoding and returns it ready to be inserted
as a value for a field, that is, in the =?<charset>?B?<string>?= format

Example:

 Encodings.b_value_encode('This is あ string', 'UTF-8')
 #=> "=?UTF-8?B?VGhpcyBpcyDjgYIgc3RyaW5n?="

Source | Google | Stack overflow

Edit

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

cd carrierwave

open

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Mail--Encodings-b_value_encode-for-pr

# Commit to git

git add git commit -m "better docs for Mail::Encodings.b_value_encode"

# Open pull request

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

hub fork

git push <your name> -your-name--update-docs-Mail--Encodings-b_value_encode-for-pr

hub pull-request

# Celebrate!