ArgumentError is raised if the keys of parameters include invalid byte sequence

[abicky]

We use GrapeLogging::Middleware::RequestLogger like below:

class MyApi < Grape::API
  use GrapeLogging::Middleware::RequestLogger, {
    include: [GrapeLogging::Loggers::FilterParameters.new],
  }
  post {}
end

If we send a request whose body includes invalid byte sequence, ArgumentError is raised.

echo -e '{"\xff":1}' | curl -X POST -H 'Content-Type: application/json' localhost:3000 --data-binary @-

Here is the server log:

ArgumentError (invalid byte sequence in UTF-8):

actionpack (5.2.1) lib/action_dispatch/http/parameter_filter.rb:63:in `=~'
actionpack (5.2.1) lib/action_dispatch/http/parameter_filter.rb:63:in `block (2 levels) in call'
actionpack (5.2.1) lib/action_dispatch/http/parameter_filter.rb:63:in `any?'
actionpack (5.2.1) lib/action_dispatch/http/parameter_filter.rb:63:in `block in call'
actionpack (5.2.1) lib/action_dispatch/http/parameter_filter.rb:61:in `each'
actionpack (5.2.1) lib/action_dispatch/http/parameter_filter.rb:61:in `call'
actionpack (5.2.1) lib/action_dispatch/http/parameter_filter.rb:15:in `filter'
grape_logging (1.7.0) lib/grape_logging/loggers/filter_parameters.rb:32:in `clean_parameters'
grape_logging (1.7.0) lib/grape_logging/loggers/filter_parameters.rb:27:in `safe_parameters'
grape_logging (1.7.0) lib/grape_logging/loggers/filter_parameters.rb:13:in `parameters'
grape_logging (1.7.0) lib/grape_logging/middleware/request_logger.rb:140:in `block (2 levels) in collect_parameters'
(snip)