Handle Invalid Percent Encoding Requests

Rails Engine that protects your app against malformed requests.

This middleware renders a 400 error instead of raising exceptions for the following errors:

• invalid byte sequence in UTF-8
• string contains null byte

In your Rails app, add these lines to your Gemfile:

# Helps against "invalid byte sequence" exceptions.
gem "handle_invalid_percent_encoding_requests"

Then type bundle install.

See also Ruby on Rails “invalid byte sequence in UTF-8” due to bot on StackOverflow.