Getting all cookies from WKWebView

Question

while getting cookies from UIWebView seems straightforward by using NSHTTPCookieStorage.sharedHTTPCookieStorage(), it seems WKWebView stores the cookies somewhere else.

I did some research, and I was able to get some cookies from the grabbing it from NSHTTPURLResponse object. this, however, does not contain all the cookies used by WKWebView:

func webView(webView: WKWebView, decidePolicyForNavigationResponse navigationResponse: WKNavigationResponse, decisionHandler: (WKNavigationResponsePolicy) -> Void) {

  if let httpResponse = navigationResponse.response as? NSHTTPURLResponse {
    if let headers = httpResponse.allHeaderFields as? [String: String], url = httpResponse.URL {
      let cookies = NSHTTPCookie.cookiesWithResponseHeaderFields(headers, forURL: url)

      for cookie in cookies {
        logDebug(cookie.description)

        logDebug("found cookie " + cookie.name + " " + cookie.value)
      }
    }
  }
}

Strangely, there's also a class WKWebsiteDataStore in ios 9 that responsible for managing cookies in WKWebView, however, the class does not contain a public method to retrieve the cookies data:

let storage = WKWebsiteDataStore.defaultDataStore()

storage.fetchDataRecordsOfTypes([WKWebsiteDataTypeCookies], completionHandler: { (records) -> Void in
  for record in records {
    logDebug("cookie record is " + record.debugDescription)

    for dataType in record.dataTypes {
      logDebug("data type is " + dataType.debugDescription)

      // get cookie data??
    }
  }
})

Is there a workaround for getting the cookie data?

Answer 1

As Stefan mentioned, cookies are stored in NSHTTPCookieStorage.sharedHTTPCookieStorage()

However, from my experiments, I found that Session cookies set by the server are not visible to NSHTTPCookieStorage.sharedHTTPCookieStorage().

As long as each WKWebView share the same instance of WKProcessPool, those Session cookies will be passed back to the server for each request. If you change the process pool for a WKWebView, you are essentially removing the session cookies for all future requests.