Cache deletion

[Drawknob]

As there seems to be no functionality to clear cache, I've tried simply deleting the files in the cache folder (running on Windows, without forced deletion, so that files to which there are open handles don't get deleted). However, this seems to cause invalid state even if all CefBrowser have been closed when I do this. Is it only safe only safe to do after CEF is fully shut down? How, then, can one implement functionality that is equivalent to clearing the cache of a regular, non-CEF browser while it is running? One thought I had is to try to ReloadIgnoreCache() after every first LoadURL() of a URL that had been loaded from the time the browser was started with empty cache, and the cache was manually cleared during runtime. But this seems very complicated and I don't know if it would even work. What's the best approach? I don't want to turn off the cache, but I do need to be able to clear it during specific times because I've come across a number of instances where state of interactive sites wasn't just stored in the cookies but also uses web storage etc.

[magreenblatt]

You cannot safely delete the cache folder while CEF is loaded. If you want to reload without using the cache use ReloadIgnoreCache.

[Drawknob]

So when in Chrome I do "Clear browsing data", how does that work?

[magreenblatt]

So when in Chrome I do "Clear browsing data", how does that work?

Good question . If you find out how that works perhaps we can do something similar in CEF.

[PolesApart]

Is there currently any lights on doing this?

[rjxray]

I too now have the need to clear cookies at runtime from a user request.
Searching in the forum I could only find this old topic.

Is there any new information on this?

[rjxray]

OK, this does it

Code: Select all

   CefRefPtr<CefCookieManager> cookieManager = CefCookieManager::GetGlobalManager(nullptr);
   cookieManager->DeleteCookies("", "", nullptr);


[ndesktop]

I'm erasing the full cache directory using OS calls after CefUninitialize (just before the return from WinMain). Additional solutions might involve a watcher executable launched from the browser, which does a WaitForSingleObject INFINITE on the browser process, and when the handle is signaled, nuke the cache directory.
Otherwise, the DeleteCookies works, if only the cookies are what needs to be cleared up.

[rjxray]

I'm also clearing local storage and navigation history like this

Code: Select all

for (auto browser : browsers) {
   CefRefPtr<CefDictionaryValue> params = CefDictionaryValue::Create();
   params->SetString("origin", browser->getCurrentURL());
   params->SetString("storage_types", "local_storage");
   browser->getHost()->ExecuteDevToolsMethod(0, "Storage.clearDataForOrigin", params);
   params->Clear();
   browser->getHost()->ExecuteDevToolsMethod(0, "Page.resetNavigationHistory", params);
   browser->reload();
}