How to create identity auth cookie and set it to webview?

Question

Hi

In my Xamarin forms app I have a hybrid web view that open an asp.net core application. When a person logs in on the WebView, Identity creates authentication cookie in the browser. So it knows the user is logged in and they can see the protected areas of the site. The session cookie is called .AspNetCore.Cookies

Could I have a login page in xamarin that creates that specific type of cookie so I can set it in the WebView and avoid logging in using the WebView ?

I would like to open the app, display the login form. call the api to check the user credentials, get the token and then create the .AspNetCore.Cookies and inject it in the browser so the user only logs in from Xamarin and not from the WebView.

Hope this makes sense.

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

You can set a cookie in Webview of Xamarin Forms, you must create a custom-renderer for Webview like following code.

   [assembly: ExportRenderer(typeof(WebView), typeof(CustomWebViewRenderer))]  
   namespace WebViewTest.Droid  
   {  
       public class CustomWebViewRenderer : WebViewRenderer  
       {  
           public CustomWebViewRenderer(Context context) : base(context)  
           {  
                 
           }  
     
           protected override void OnElementChanged(ElementChangedEventArgs<WebView> e)  
           {  
               base.OnElementChanged(e);  
     
               if (Control != null)  
               {  
                    Control.Settings.JavaScriptEnabled = true;  
                   var webViewClient = new CustomWebViewClient();  
                   Control.SetWebViewClient(webViewClient);  
     
                   CookieManager cookieManager = CookieManager.Instance;  
                   if (Build.VERSION.SdkInt < BuildVersionCodes.Lollipop)  
                   {  
                       CookieSyncManager.CreateInstance(Control.Context);  
                   }  
                   cookieManager.SetAcceptCookie(true);  
                    
                    
                   cookieManager.RemoveSessionCookie();  
                   cookieManager.SetCookie("http://xx.example.com", "mid=" + MySession.GetSession().sessionId + " ; Domain=.example.com");  
     
                   //get the cookie  
                   string cookie = cookieManager.GetCookie("http://xx.example.com");  
     
                   
     
               }  
           }  

If you have issue about creating identity AspNetCore.Cookies, please open a new thread in the asp.net forum.

Best Regards,

Leon Lu

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