Mozilla reload API method doesn't work

I try to reload a Web page using (JavaXPCOM):

nsIWebBrowser webBrowser = (nsIWebBrowser) browser
                        .getWebBrowser();
nsIWebNavigation webNavigation = (nsIWebNavigation) webBrowser.queryInterface(nsIWebNavigation.NS_IWEBNAVIGATION_IID);
try {
    nsISHistory sessionHistory = webNavigation.getSessionHistory();
    if (sessionHistory != null) {
        webNavigation = (nsIWebNavigation) sessionHistory.queryInterface(nsIWebNavigation.NS_IWEBNAVIGATION_IID);
    }
} catch (XPCOMException e) {
}
webNavigation.re开发者_运维百科load(nsIWebNavigation.LOAD_FLAGS_NONE);

But reload doesn't happen at all. I tried force it by using the following flags, but page doesn't refresh as well:

nsIWebNavigation.LOAD_FLAGS_BYPASS_PROXY|nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE

Anyone knows what can be the reason for that? Thanks!

Did you try checking Error Console for syntax errors? You seem to be trying to use C++ type casts in JavaScript. That cannot work. Assuming that browser is a <browser> element, this should work:

browser.reload();

Or:

browser.reloadWithFlags(Components.interfaces.nsIWebNavigation.LOAD_FLAGS_BYPASS_PROXY|Components.interfaces.nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE);

See https://developer.mozilla.org/en/XUL/browser for documentation on the <browser> element.

Edit: Given that this is apparently using JavaXPCOM the code seems to be correct with the exception that the entire try .. catch block should be removed. The only flag should be LOAD_FLAGS_BYPASS_CACHE to make sure you don't get a cached response.