How to Set the Cookies to Be Used by a Wkwebview

Can I set the cookies to be used by a WKWebView?

Edit for iOS 11+ only

Use WKHTTPCookieStore:

let cookie = HTTPCookie(properties: [
    .domain: "example.com",
    .path: "/",
    .name: "MyCookieName",
    .value: "MyCookieValue",
    .secure: "TRUE",
    .expires: NSDate(timeIntervalSinceNow: 31556926)
])! 

webView.configuration.websiteDataStore.httpCookieStore.setCookie(cookie)

Since you are pulling them over from HTTPCookeStorage, you can do this:

let cookies = HTTPCookieStorage.shared.cookies ?? []
for cookie in cookies {
    webView.configuration.websiteDataStore.httpCookieStore.setCookie(cookie)
}

Old answer for iOS 10 and below

If you require your cookies to be set on the initial load request, you can set them on NSMutableURLRequest. Because cookies are just a specially formatted request header this can be achieved like so:

WKWebView * webView = /*set up your webView*/
NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://example.com/index.html"]];
[request addValue:@"TeskCookieKey1=TeskCookieValue1;TeskCookieKey2=TeskCookieValue2;" forHTTPHeaderField:@"Cookie"];
// use stringWithFormat: in the above line to inject your values programmatically
[webView loadRequest:request];

If you require subsequent AJAX requests on the page to have their cookies set, this can be achieved by simply using WKUserScript to set the values programmatically via javascript at document start like so:

WKUserContentController* userContentController = WKUserContentController.new;
WKUserScript * cookieScript = [[WKUserScript alloc] 
    initWithSource: @"document.cookie = 'TeskCookieKey1=TeskCookieValue1';document.cookie = 'TeskCookieKey2=TeskCookieValue2';"
    injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:NO];
// again, use stringWithFormat: in the above line to inject your values programmatically
[userContentController addUserScript:cookieScript];
WKWebViewConfiguration* webViewConfig = WKWebViewConfiguration.new;
webViewConfig.userContentController = userContentController;
WKWebView * webView = [[WKWebView alloc] initWithFrame:CGRectMake(/*set your values*/) configuration:webViewConfig];

Combining these two techniques should give you enough tools to transfer cookie values from Native App Land to Web View Land. You can find more info on the cookie javascript API on Mozilla's page if you require some more advanced cookies.

Yeah, it sucks that Apple is not supporting many of the niceties of UIWebView. Not sure if they will ever support them, but hopefully they will get on this soon. Hope this helps!

WKWebview cookie issue?

Apparently the issue is that WKWebview does not handle cookie passing into the request header for us. Hence I received 401 authentication failure every time when I reach the server.

Unfortunately React-Native-Webview does not has a way to handle this cookie header passing out of the box (Please correct me if I'm wrong). I'm fully aware of this 'custom header' function provided within the lib, unfortunately it didn't work as expected. The cookie is still not part of the request header.

My solution to this is as follow, did under method decidePolicyForNavigationAction:

1. Dive into native lib (React-Native-Webview)
2. Loop through all existing cookies within websiteDataStore.httpCookieStore
3. Look for my cookie (of course, you should know your cookie name)
4. Append the cookie into the HTTPHeaderField to your http request
5. Load the http request again!

if (@available(iOS 11.0, *)) {
          [webView.configuration.websiteDataStore.httpCookieStore getAllCookies:^(NSArray<NSHTTPCookie *> * _Nonnull cookies) {
              NSLog(@"All cookies in websiteDataStore %@", cookies);
              for(NSHTTPCookie *cookie in cookies){
                  if([cookie.name isEqualToString:@"coookieName"]){
                      if([navigationAction.request valueForHTTPHeaderField:@"Cookie"] != nil ){
                          
                      }else{
                          NSMutableURLRequest *req = [request mutableCopy];
                          NSString *newCookie = [NSString stringWithFormat:@"cookieName=%@" , cookie.value];

                          // As you can see, I'm appending the cookie value into header myself 
                          [req addValue:newCookie forHTTPHeaderField:@"Cookie"];
                          [req setHTTPShouldHandleCookies:YES];
                          [webView loadRequest:req];
                          return;
                      }
                  }
              }
          }];
      } else {
          // Fallback on earlier versions
      }

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