ResponseFilter.java 文件源码

public void doFilter(RenderRequest request, RenderResponse response, FilterChain chain) throws IOException, PortletException
{

  String account = request.getPreferences().getValue("account", null);

  if (account!=null) {
    Element jQuery1 = response.createElement("script");
    jQuery1.setAttribute("type", "text/javascript");
    String textContent = "var _gaq = _gaq || [];\n" +
            "  _gaq.push(['_setAccount', '"+account+"']);\n" +
            "  _gaq.push(['_trackPageview']);\n" +
            "\n" +
            "  (function() {\n" +
            "    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;\n" +
            "    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';\n" +
            "    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);\n" +
            "  })();";

    jQuery1.setTextContent(textContent);
    response.addProperty(MimeResponse.MARKUP_HEAD_ELEMENT, jQuery1);
  }

  //
  chain.doFilter(request, response);
}