Class: TranslationCms::HandleInvalidPercentEncoding

Inherits:
Object
  • Object
show all
Defined in:
lib/translation_cms/handle_invalid_percent_encoding.rb

Constant Summary collapse

DEFAULT_CONTENT_TYPE = 
'text/html'
DEFAULT_CHARSET = 
ActionDispatch::Response.default_charset

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app, stdout = STDOUT) ⇒ HandleInvalidPercentEncoding

Returns a new instance of HandleInvalidPercentEncoding.



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# File 'lib/translation_cms/handle_invalid_percent_encoding.rb', line 13

def initialize(app, stdout = STDOUT)
  @app = app
  @logger = defined?(Rails.logger) ? Rails.logger : Logger.new(stdout)
end

Instance Attribute Details

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/translation_cms/handle_invalid_percent_encoding.rb', line 11

def logger
  @logger
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/translation_cms/handle_invalid_percent_encoding.rb', line 18

def call(env)
  # calling env.dup here prevents bad things from happening
  request = ActionDispatch::Request.new(env.dup)
  # calling request.params is sufficient to trigger the error
  # see https://github.com/rack/rack/issues/337#issuecomment-46453404
  request.params
  @app.call(env)
rescue ArgumentError => e
  raise unless e.message =~ /invalid %-encoding/

  message = "BAD REQUEST: Returning 400 due to #{e.message} from request with env #{request.inspect}"
  logger.info message
  content_type = request.formats.first || DEFAULT_CONTENT_TYPE
  status = 400
  body   = 'Bad Request'
  [
    status,
    {
      'Content-Type' => "#{content_type}; charset=#{DEFAULT_CHARSET}",
      'Content-Length' => body.bytesize.to_s
    },
    [body]
  ]
end