Re: The GWT application hangs on the loading screen

There might be an error in the actual code of the app (exception or other).

I suggest you try some primitive debugging with a Window.alert message as the first line of your onModuleLoad method.

ie...

 @Override
public void onModuleLoad() {

Window.alert("App is starting");

On Wednesday, January 17, 2024 at 10:16:54 AM UTC-7 Antonio Capone wrote:

 Hi Frank, thanks for the support.
No errors appear in the application logs of the application nor in the Develop Tool. The nocache.js file is successfully loaded. What else could it be?

Regrds

Il giorno lunedì 15 gennaio 2024 alle 15:15:56 UTC+1 Frank Hossfeld ha scritto:

Did you check in the Developer Tools ->. Network if the nochache.js gets loaded?

Antonio Capone schrieb am Montag, 15. Januar 2024 um 09:53:58 UTC+1:

Hello everyone and thanks for the advice you are giving me.
The nocache.js file is regularly generated and loaded. I don't think I have a problem with the URI because I can also see the home page grid but nothing more. No errors appear in the developer tool. Note that I upgraded from GWT 2.1 to GWT 2.7 and before that I had no problems.
Can you give me some other suggestions?
Thanks again.

Il giorno domenica 14 gennaio 2024 alle 05:39:07 UTC+1 Craig Mitchell ha scritto:

I use a servlet filter to tell the browser not to cache the nocache files:

public class ServletFilter implements Filter {
  private static final String NO_CACHE = ".nocache.js";

  @Override
  public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    String requestURI = ((HttpServletRequest)request).getRequestURI();

    // Don't cache the nocache
    if (requestURI.endsWith(NO_CACHE)) {
      setNoCache((HttpServletResponse)response);
    }
    chain.doFilter(request, response);
  }

  private void setNoCache(HttpServletResponse httpResponse) {
    Date now = new Date();
    httpResponse.setDateHeader("Date", now.getTime());
    httpResponse.setDateHeader("Expires", now.getTime() - 86400000L);
    httpResponse.setHeader("Pragma", "no-cache");
    httpResponse.setHeader("cache-control", "public, max-age=0, must-revalidate");
  }
}

On Saturday 13 January 2024 at 2:54:08 am UTC+11 Jeff Hill wrote:

There may have been some Chrome updates in the last few months; occasionally, I must hard refresh to get the latest code from nocache.js.  (That did not happen in  years past)

Anyway, I always check in Developer Tools in Chrome to make sure there are no errors in the "Console" and all the necessary files are being loaded in the "Network" tab.

On Thursday, January 11, 2024 at 6:42:14 AM UTC-7 Frank Hossfeld wrote:

Check if the nochache.js gets loaded at a applicaiton staert or if it got a 404. In this case something with the URI is not ok.

Antonio Capone schrieb am Donnerstag, 11. Januar 2024 um 10:56:55 UTC+1:

Hi all. I deployed an app using GWT on Cloud. It's deployed and working, but when you log in, the browser window just says "Loading" and seems to hang indefinitely. Works fine locally in Eclipse.

Has this ever happened to you? Is there anyone who can help me understand why this happens?
Many thanks

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