request host, query paramters, header

登入登出轉址設計
<br />request.env['QUERY_STRING']<br />"cat=futures&sort=latest"<br /><br />#full url<br />request.url<br />#http://localhost:3000/home/<br /><br />#path<br />request.request_uri<br />"/home/"<br /><br />#host_and_port<br />request.host_with_port<br /><br />#source code http://api.rubyonrails.org/classes/ActionController/Base.html<br /> when :back<br /> if referer = request.headers["Referer"]<br /> redirect_to(referer, :status=>status)<br /> else<br /> raise RedirectBackError<br /> end<br /><br /><br />