```ruby
module WashOut
  # This class is a Rack middleware used to route SOAP requests to a proper
  # action of a given SOAP controller.
  class Router
    def initialize(controller_name)
      @controller_name = "#{controller_name.to_s}_controller".camelize
    end

    def call(env)
      controller = @controller_name.constantize

      soap_action = env['HTTP_SOAPACTION']
      soap_action.force_encoding('UTF-8')
      soap_action.gsub!(/^\"(.*)\"$/, '\1')

      env['wash_out.soap_action'] = soap_action

      action_spec = controller.soap_actions[soap_action]
      if action_spec
        action = action_spec[:to]
      else
        action = '_invalid_action'
      end

      controller.action(action).call(env)
    end
  end
end```

Add a 1.8 compatibility shim.
user
```ruby
module WashOut
  # This class is a Rack middleware used to route SOAP requests to a proper
  # action of a given SOAP controller.
  class Router
    def initialize(controller_name)
      @controller_name = "#{controller_name.to_s}_controller".camelize
    end

    def call(env)
      controller = @controller_name.constantize

      soap_action = env['HTTP_SOAPACTION']

      # RUBY18 1.8 does not have force_encoding.
      soap_action.force_encoding('UTF-8') if soap_action.respond_to? :force_encoding

      soap_action.gsub!(/^\"(.*)\"$/, '\1')

      env['wash_out.soap_action'] = soap_action

      action_spec = controller.soap_actions[soap_action]
      if action_spec
        action = action_spec[:to]
      else
        action = '_invalid_action'
      end

      controller.action(action).call(env)
    end
  end
end```
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