Re: app not reload from android chrome

Hey Pierre,

You can use a special web filter for better handling of caching. 

Here is an example similar to what I use on my projects, 

Add the following to your web.xml

<filter>
   <filter-name>gwtCacheControlFilter</filter-name>
   <filter-class>com.acme.server.GWTCacheControlFilter</filter-class>
   <init-param>
      <param-name>Cache-Control</param-name>
      <param-value>max-age=31536000, public</param-value>
   </init-param>
</filter>

<filter-mapping>
   <filter-name>gwtCacheControlFilter</filter-name>
   <url-pattern>/*</url-pattern>
</filter-mapping>

And the doFilter method of your filter class would be something like

public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException,
        ServletException {

    HttpServletRequest httpRequest = (HttpServletRequest) request;
    String requestURI = httpRequest.getRequestURI();

    if (requestURI.contains(".nocache.")) {
        Date now = new Date();
        HttpServletResponse httpResponse = (HttpServletResponse) response;
        httpResponse.setDateHeader("Date", now.getTime());
        // one day old
        httpResponse.setDateHeader("Expires", now.getTime() - 86400000L);
        httpResponse.setHeader("Pragma", "no-cache");
        httpResponse.setHeader("Cache-control", "no-cache, no-store, must-revalidate");
    } else if (requestURI.contains(".cache.")) {
        HttpServletResponse httpResponse = (HttpServletResponse) response;
        // one day old
        httpResponse.setHeader("Cache-Control", "public, max-age=31536000");
        httpResponse.setDateHeader("Expires", DateUtil.addDays(new Date(), 365).getTime());
    } 

    filterChain.doFilter(request, response);
}
   

-Selcuk

On Mon, Jan 11, 2021 at 1:35 PM pierre...@gmail.com <pierregilquin@gmail.com> wrote:

Hi,
I have a gwt app developed with gwt-material but I assume it's not relevant for this problem.
The app is served by Tomcat.
Everything is fine with PC/iphone/iPad but with android after deploying a new app, the old one is still showned. The nocache mecanism doesnot work in android chrome.
Removing the cache works, but I cannot asks that to my users.

Any hint how can I force the browser  to reload the app from server for theses mobiles ?
Thanks in advance
Pierre

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