Avoid back page rendering after sign out in


i've seen:

<a href="https://stackoverflow.com/questions/49547/making-sure-a-web-page-is-not-cached-across-all-browsers/2068407" rel="nofollow">How to control web page caching, across all browsers?</a> <a href="https://stackoverflow.com/questions/10330336/after-logout-click-on-back-button-cache-issue" rel="nofollow">enter link description here</a>

I've used in JSF 1.2 pages:

<meta http-equiv="Cache-control" content="no-store, no-cache, must-revalidate"/> <meta http-equiv="Pragma" content="no-cache" /> <meta http-equiv="Expires" content="-1"/> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE8"/>

It did not work in IE8 e Chrome! When I use the back button it shows the page again! What is wrong? Regards.


Here's a cite from <a href="https://stackoverflow.com/questions/49547/making-sure-a-web-page-is-not-cached-across-all-browsers/2068407" rel="nofollow">How to control web page caching, across all browsers?</a> which you linked in your question but apparently overlooked:


Note that when the page is served over HTTP and a header is present in <strong>both</strong> the HTTP response headers and the HTML meta tags, then the one specified in the response header will get precedence over the HTML meta tag. The HTML meta tag will only be used when the page is viewed from local disk file system. See also <a href="http://www.w3.org/TR/html4/charset.html#h-5.2.2" rel="nofollow">W3 HTML spec chapter 5.2.2</a>. Take care with this when you don't specify them programmatically, because the webserver can namely include some default values. To verify the one and other, you can see/debug them using Firebug Net panel.


This is apparently the case. You need to set those headers on the real HTTP response, not in its HTML output. In case of a JSF 1.x web application the best way is to create a <a href="https://stackoverflow.com/tags/servlet-filters/info" rel="nofollow">servlet filter</a> to perform the task. Here's a kickoff example:

public class NoCacheFilter implements Filter { @Override public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException { HttpServletResponse response = (HttpServletResponse) res; response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1. response.setHeader("Pragma", "no-cache"); // HTTP 1.0. response.setDateHeader("Expires", 0); // Proxies. chain.doFilter(req, res); } // ... }

Map it in web.xml on an URL pattern of interest, e.g. *.jsf or on the servlet name of the FacesServlet.


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