How do I read a cookie value?

[pipiscrew]

hi,

using the library in simple way, as example :

private readonly WebView web_view;

        public Form1()
        {
            InitializeComponent();
            web_view = new WebView("http://x.com/", new BrowserSettings());
            web_view.Dock = DockStyle.Fill;
            this.Controls.Add(web_view);
        }

where the user login through CefSharp browser. I would like to read the PHPSESSIONID value stored in cookie. how can I do that?

thanks

[edit]
seems the only way, I add

    class webview_cookies : ICookieVisitor
    {
        public bool Visit(Cookie cookie, int count, int total, ref bool deleteCookie)
        {
            Console.WriteLine(cookie.Name +" = " +  cookie.Value);

            return true;
        }
    }

when I like to read the cookie

            webview_cookies o = new webview_cookies();

            CEF.VisitAllCookies(o);

[jankurianski]

That is correct, but be careful - the visitor is called from another thread. CEF.VisitAllCookies(o); will return immediately and you need to use a synchronization mechanism to wait on your main thread until you get the right cookie on the background visitor thread (or until count == total - 1).

[jankurianski]

Here's an example I made for the CefSharp3 WinForms example that waits until all cookies are collected and then shows them as a message box (should be similar for CefSharp1 or WPF):

        private void ViewAllCookiesToolStripMenuItem_Click(object sender, EventArgs e)
        {
            var visitor = new CookieMonster(all_cookies => {
                var sb = new StringBuilder();
                foreach (var nameValue in all_cookies)
                    sb.AppendLine(nameValue.Item1 + " = " + nameValue.Item2);
                BeginInvoke(new MethodInvoker(() => {
                    MessageBox.Show(sb.ToString());
                }));
            });
            Cef.VisitAllCookies(visitor);
        }

        class CookieMonster : ICookieVisitor
        {
            readonly List<Tuple<string, string>> cookies = new List<Tuple<string, string>>();
            readonly Action<IEnumerable<Tuple<string, string>>> useAllCookies;

            public CookieMonster(Action<IEnumerable<Tuple<string, string>>> useAllCookies)
            {
                this.useAllCookies = useAllCookies;
            }

            public bool Visit(Cookie cookie, int count, int total, ref bool deleteCookie)
            {
                cookies.Add(new Tuple<string, string>(cookie.Name, cookie.Value));

                if (count == total - 1)
                    useAllCookies(cookies);

                return true;
            }
        }

[jankurianski]

Here's another version that doesn't work asynchronously, and just blocks the main thread till all cookies are collected:

        private void ViewAllCookiesToolStripMenuItem_Click(object sender, EventArgs e)
        {
            var visitor = new CookieMonster();
            if (Cef.VisitAllCookies(visitor))
                visitor.WaitForAllCookies();
            var sb = new StringBuilder();
            foreach (var nameValue in visitor.NamesValues)
                sb.AppendLine(nameValue.Item1 + " = " + nameValue.Item2);
            MessageBox.Show(sb.ToString());
        }

        class CookieMonster : ICookieVisitor
        {
            readonly List<Tuple<string, string>> cookies = new List<Tuple<string, string>>();
            readonly ManualResetEvent gotAllCookies = new ManualResetEvent(false);

            public bool Visit(Cookie cookie, int count, int total, ref bool deleteCookie)
            {
                cookies.Add(new Tuple<string, string>(cookie.Name, cookie.Value));

                if (count == total - 1)
                    gotAllCookies.Set();

                return true;
            }

            public void WaitForAllCookies()
            {
                gotAllCookies.WaitOne();
            }

            public IEnumerable<Tuple<string, string>> NamesValues
            {
                get { return cookies; }
            }
        }

[pipiscrew]

check this lazy code w/ raise event!

//used to read cookies
    class get_appointments_via_phpsessid : ICookieVisitor
    {
        public bool Visit(Cookie cookie, int count, int total, ref bool deleteCookie)
        {
            if (cookie.Name.ToUpper() == "PHPSESSID")
            {
                //---------------------------store PHPSESSID value to static variable!
                General.php_sessid = cookie.Value;

                //---------------------------call to static function -> PHP Call get records
                List<appointment_item> x =  General.get_appointments();

                //---------------------------attach event to method!
                if (sendMessage != null)
                    sendMessage(this, new MyEventArgs(x, false));

                return true;
            }
            else
                return false;
        }

        public event EventHandler<MyEventArgs> sendMessage;
    }

    public class MyEventArgs : EventArgs
    {
        // ... your event args properties and methods here...
        public List<appointment_item> appointments { get; set; }
        public bool isWarning { get; set; }

        public MyEventArgs(List<appointment_item> message, bool iswarning)
        {
            appointments = message;
            isWarning = iswarning;
        }

    }

//button_click
        get_appointments_via_phpsessid d = new get_appointments_via_phpsessid();
        //---------------------------attach event to method!
        d.sendMessage += new EventHandler<MyEventArgs>(check_appointments);

        //get PHPSESSIONID
        CEF.VisitAllCookies(d);


//the event
        void check_appointments(object sender, MyEventArgs e)
        {

            string app_items = "";
            foreach (appointment_item item in e.appointments)
            {
                app_items += item.handle + "\r\n";
            }

            MessageBox.Show(app_items);
        }

[amaitland]

http://magpcss.org/ceforum/apidocs3/projects/%28default%29/CefCookieVisitor.html#Visit%28constCefCookie&,int,int,bool&%29

Method that will be called once for each cookie. |count| is the 0-based index for the current cookie. |total| is the total number of cookies. Set |deleteCookie| to true to delete the cookie currently being visited. Return false to stop visiting cookies. This method may never be called if no cookies are found.

@pipiscrew According to the documentation return false in your Visit method will stop visiting, you may need to flip your logic around.

[flcl42]

This method may never be called if no cookies are found.

So the only way to get cookies in same method where VisitAllCookies was called is to wait some time. So painfully.

[goodmailf]

I can not resolve Cef.VisitAllCookies.
I am very confused. Can anybody guide me how to read cookies?

My initial code is .

       ` CefSettings settings = new CefSettings();
        string path = Application.StartupPath + "\\Bin";
        //settings.CachePath = path;
        //settings.PersistSessionCookies = true;                        

        Cef.Initialize(settings);          

        Chromebrowser = new ChromiumWebBrowser("https://example.com");
        panel1.Controls.Add(Chromebrowser);

        Chromebrowser.Dock = DockStyle.Fill;`

[pipiscrew]

no tested with latest version (the snippets are ~2yrs ago)

CefSharp hints

-check the req runtimes
-check the reference mention

[goodmailf]

Thank you for your response.

Cef.VisitAllCookies

The chrome browser is working fine. I can also see Cookies file in the cache folder. However from the code Cef does not contain definition for VisitAllCookies. I am getting this error message.

Am I missing something here?

[pipiscrew]

as I wrote @ article, CefSharp.Core.dll referenced ?

[goodmailf]

Yes CefSharp.core.dll is referenced.

https://s22.postimg.org/h74ci1go1/Capture.jpg