rails encoding problem

I was trying to send an http request in my controller to get the
content of the response and display it in a text field in the view,
but sometimes i got a "redundant UTF-8 sequence" exception. Even if
the exception was not raised, the chinese characters cannot be
properly displayed.What should I do?

post your controller code...

Mikel
http://lindsaar.net/

my action code:
  def get_content
    @url = params[:url]
    response = Net::HTTP.get_response(URI.parse(@url))
    @content = response.body
  end