Sync WKWebView Cookie to NSHTTPCookieStorage

Question

WKWebView can manage its own cookie in WKHTTPCookieStorage, independent with NSHTTPCookieStorage. How can I sync cookie from WKHTTPCookieStore to NSHTTPCookieStorage.

My target is sync the cookies with WKHTTPCookieStore and NSHTTPCookieStorage.

I try to sync cookie with implement the observer method WKHTTPCookieStoreObserver.

- (void)cookiesDidChangeInCookieStore:(WKHTTPCookieStore *)cookieStore {
[cookieStore getAllCookies:^(NSArray<NSHTTPCookie *> *array) {
    NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
    NSArray *nsHttpCookies = cookieStorage.cookies;

    //add new Cookie from wkWebView
    [array enumerateObjectsUsingBlock:^(NSHTTPCookie *cookie, NSUInteger idx, BOOL *stop) {
        if(![nsHttpCookies containsObject:cookie]){
            [cookieStorage setCookie:cookie];
        }
    }];

    //add old Cookie from wkWebView
    [nsHttpCookies enumerateObjectsUsingBlock:^(NSHTTPCookie *cookie, NSUInteger idx, BOOL *stop) {
        if(![array containsObject:cookie]){
            [cookieStorage deleteCookie:cookie];
        }
    }];
}];
}

It's the right way to sync the cookie from WKWebView to NSHTTPCookieStorage?

Hey, did you try to use WKNavigationDelegate instead? Maybe you could use WKNavigationResponse and extract header fields from the urlResponse. In the header fields, you should have a `Cookie` header as a String. Then you can explode it and compare what's missing. It's just an idea — Ben, Feb 20 '18 at 17:48
Unfortunately, at least in iOS 13, the observer method isn't called at all... (https://stackoverflow.com/q/58397343/2778898). So I decided to implement the synchronization manually when initiating a new request. — LaborEtArs, May 01 '20 at 08:57

score 3 · Answer 1 · edited Sep 12 '18 at 11:06

As Ben answered in a comment you need to extract the cookies from the response header and set them manual in the HTTPCookieStorage.

Swift 4:

func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationResponsePolicy) -> Swift.Void) {
    guard
        let response = navigationResponse.response as? HTTPURLResponse,
        let url = navigationResponse.response.url
    else {
        decisionHandler(.cancel)
        return
    }

    if let headerFields = response.allHeaderFields as? [String: String] {
        let cookies = HTTPCookie.cookies(withResponseHeaderFields: headerFields, for: url)
        cookies.forEach { (cookie) in
             HTTPCookieStorage.shared.setCookie(cookie)
        }
    }

    decisionHandler(.allow)
}

Objective-C:

NSHTTPURLResponse * resp = (NSHTTPURLResponse*)[navigationResponse response];
NSDictionary  *diction = [resp allHeaderFields];

NSArray * cookies = [NSHTTPCookie cookiesWithResponseHeaderFields:diction forURL:[resp URL]];

for (NSHTTPCookie *cookie in cookies) {
    [[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];
}

return decisionHandler(YES);

Seems like cookies are not present in the headers anymore. Do you have any other suggestions? — Hari Ram, Apr 28 '20 at 18:49

Sync WKWebView Cookie to NSHTTPCookieStorage

1 Answers1