class WEBrick::HTTPServlet::ERBHandler

def do_GET(req, res)
  unless defined?(ERB)
    @logger.warn "#{self.class}: ERB not defined."
    raise HTTPStatus::Forbidden, "ERBHandler cannot work."
  end
  begin
    data = File.open(@script_filename, &:read)
    res.body = evaluate(ERB.new(data), req, res)
    res['content-type'] ||=
      HTTPUtils::mime_type(@script_filename, @config[:MimeTypes])
  rescue StandardError
    raise
  rescue Exception => ex
    @logger.error(ex)
    raise HTTPStatus::InternalServerError, ex.message
  end
end

def evaluate(erb, servlet_request, servlet_response)
  Module.new.module_eval{
    servlet_request.meta_vars
    servlet_request.query
    erb.result(binding)
  }
end

def initialize(server, name)
  super(server, name)
  @script_filename = name
end