carrierwave

https://github.com/carrierwaveuploader/carrierwave

Ruby

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

Mail::Encodings.param_encode

Encodes a parameter value using URI Escaping, note the language field 'en' can
be set using Mail::Configuration, like so:

 Mail.defaults do
   param_encode_language 'jp'
 end

The character set used for encoding will either be the value of $KCODE for
Ruby < 1.9 or the encoding on the string passed in.

Example:

 Mail::Encodings.param_encode("This is fun") #=> "us-ascii'en'This%20is%20fun"

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-param_encode-for-pr

# Commit to git

git add git commit -m "better docs for Mail::Encodings.param_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-param_encode-for-pr

hub pull-request

# Celebrate!