module Rack
  # Rack::ShowExceptions catches exceptions raised from the app,
  # showing a useful backtrace with clickable stack frames and 
  # TextMate links to source files, as well as the last database
  # query, GET/POST params, cookies, and Rack environment variables.
  #
  # Be careful using this on public-facing sites as it could reveal 
  # potentially sensitive information to malicious users.

  class ShowExceptions
    def initialize(app)
      @app = app
    end
    
    def call(env)
      @app.call(env)
    rescue StandardError, LoadError, SyntaxError => e
      body = Kiss::ExceptionReport.generate(env, e)
      [500, {
        "Content-Type" => "text/html",
        "Content-Length" => body.length.to_s,
        "X-Kiss-Error-Type" => e.class.name,
        "X-Kiss-Error-Message" => e.message.sub(/\n.*/m,'')
      }, body]
    end
  end
end