Unable to get cf_clearance cookie

[marcussacana]

I'm trying to get all cookies from X instance to copy it to another RequestContext, after the user solve the cloudflare challange a cf_clearance is created with those headers:

Set-Cookie: cf_clearance=; Path=/; Expires=Thu, 01-Jan-70 00:00:00 GMT; Domain=.domain.com; HttpOnly; Secure; SameSite=None
Set-Cookie: cf_clearance=USER_TOKEN; Path=/; Expires=Fri, 11-Jul-25 04:46:28 GMT; Domain=.domain.com; HttpOnly; Secure; SameSite=None; Partitioned
Set-Cookie: _va=13;path=/;domain=.domain.com;Max-Age=43200

Then I wrote this function to capture the cookies:

public static CefSharp.Cookie[] GetCookies(this IBrowser Browser) {
    try
    {
        return AsyncContext.Run(async () =>
        {
            var Callback = new TaskCompletionCallback();
            var CookieManager = Cef.GetGlobalCookieManager(Callback);
            await Callback.Task;
            return await CookieManager.VisitAllCookiesAsync(); 
        }).ToArray();           
    }
    catch { return null;  }
}

But as you can see, there are no cf_clearance cookie

Currently I was able to capture that cookie by using the RequestHandler and implementing a entirely manual http request for the browser, then sometime in the cloudflare startup the cf_clearance can be collected from the set-cookie header.
But this is not the best soluction because is too intrusive, my http request implementation isn't the same of the browser therefore the user has more trouble to solve the cloudflare challange.

[marcussacana]

I'm suspecting the problem is the cookie be set as Secure the CEF tries to hide it from the developer as well?

[amaitland]

Without a full example it's impossible to know what's going on. Remember that CefSharp is just a wrapper. It doesn't directly implement any of this functionality.

You can try use CDP to get the cookies.

• https://chromedevtools.github.io/devtools-protocol/tot/Storage/#method-getCookies
• Enhancement - Add DevToolsClient (Direct Devtools Protocol) #3165