How to Get Cookies Info Inside of a Cookiecontainer (All of Them, Not for a Specific Domain)

How to get cookies info inside of a CookieContainer? (All Of Them, Not For A Specific Domain)

reflection can be used to get the private field that holds all the domain key in CookieContainer object,

Q. How do i got the name of that private field ?

Ans. Using Reflector;

its is declared as :

private Hashtable m_domainTable;

once we get the private field, we will get the the domain key, then getting cookies is a simple iteration.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Net;
using System.Collections;

namespace ConsoleApplication4
{
    static class Program
    {
        private static void Main()
        {
            CookieContainer cookies = new CookieContainer();
            cookies.Add(new Cookie("name1", "value1", "/", "domain1.com"));
            cookies.Add(new Cookie("name2", "value2", "/", "domain2.com"));

            Hashtable table = (Hashtable)cookies.GetType().InvokeMember(
                "m_domainTable",                                                      
                BindingFlags.NonPublic |                                                                           
                BindingFlags.GetField |                                                                     
                BindingFlags.Instance,                                                                      
                null,                                                                            
                cookies,
                new object[]{}
            );

            foreach (var key in table.Keys)
            {
                Uri uri = new Uri(string.Format("http://{0}/", key));

                foreach (Cookie cookie in cookies.GetCookies(uri))
                {
                    Console.WriteLine("Name = {0} ; Value = {1} ; Domain = {2}",
                        cookie.Name, cookie.Value, cookie.Domain);
                }
            }

            Console.Read();
        }
    }
}

How can I get all Cookies of a CookieContainer?

A solution using reflection:

public static CookieCollection GetAllCookies(CookieContainer cookieJar)
{
    CookieCollection cookieCollection = new CookieCollection();

    Hashtable table = (Hashtable) cookieJar.GetType().InvokeMember("m_domainTable",
                                                                    BindingFlags.NonPublic |
                                                                    BindingFlags.GetField |
                                                                    BindingFlags.Instance,
                                                                    null,
                                                                    cookieJar,
                                                                    new object[] {});

    foreach (var tableKey in table.Keys)
    {
        String str_tableKey = (string) tableKey;

        if (str_tableKey[0] == '.')
        {
            str_tableKey = str_tableKey.Substring(1);
        }

        SortedList list = (SortedList) table[tableKey].GetType().InvokeMember("m_list",
                                                                    BindingFlags.NonPublic |
                                                                    BindingFlags.GetField |
                                                                    BindingFlags.Instance,
                                                                    null,
                                                                    table[tableKey],
                                                                    new object[] { });

        foreach (var listKey in list.Keys)
        {
            String url = "https://" + str_tableKey + (string) listKey;
            cookieCollection.Add(cookieJar.GetCookies(new Uri(url)));
        }
    }

    return cookieCollection;
}

---

.NET 6 Update

Finally, .NET 6 was released and introduced the CookieContainer.GetAllCookies() method which extracts the CookieCollection - Documentation link.

public System.Net.CookieCollection GetAllCookies();

How convert CookieContainer to string?

If you are only interested in the cookies for a specific domain, then you can iterate using the GetCookies() method.

var cookieContainer = new CookieContainer();
var testCookie = new Cookie("test", "testValue");
var uri = new Uri("https://www.google.com");
cookieContainer.Add(uri, testCookie);

foreach (var cookie in cookieContainer.GetCookies(uri))
{
    Console.WriteLine(cookie.ToString()); // test=testValue
}

If your interested in getting all the cookies, then you may need to use reflection as provided by this answer.

Why CookieContainer does not replace cookies with the same name?

It's a bug in dotnet runtime: https://github.com/dotnet/runtime/issues/60628

Pending PR: https://github.com/dotnet/runtime/pull/64038

retrieve data inside cookieContainer in java

I just find out the reason why, my cookie domain set wrong way.

Here the new test Code I just fix. Hope this help who have the same problem in the future ( Of cause it must be great if no one face this silly problem )

private HttpWebRequest request(){
    try{
        System.Uri uri = new System.Uri("http://localhost:8080/...");
        var request = (HttpWebRequest)WebRequest.Create(uri);
        request.Timeout = 15000;
        request.KeepAlive = true ;
        request.Method= "GET";

        Cookie Authentication = new Cookie("Session" , "09iubasd");
        Authentication.Domain = uri.Host;
        request.CookieContainer = new CookieContainer();
        request.CookieContainer.Add(Authentication);
        request.Headers.Add("testting", "hascome");
        return request;
    }catch(System.Exception ex){
        Debug.Log("[Exception]" + ex);
        throw ex;
    }

}

Cookie for domain not being used for subdomains

As I couldn't find an answer to this (not in TechNet either), I decided to go with the following solution, which works, but not sure if there is a proper way of solving the issue:

foreach (Cookie cookie in cookies.GetCookies(new Uri("https://dev.example.com")))
{
    cookies.Add(new Uri("https://accounts.dev.example.com"), new Cookie(cookie.Name, cookie.Value, cookie.Path, ".accounts.dev.example.com"));
}

So, I'm duplicating the cookie for each one of the subdomains that my app should send these cookies to.

How to remove cookies under 1 domain in CookieContainer

You could do something like this.

CookieContainer c = new CookieContainer();
var cookies = c.GetCookies(new Uri("http://www.google.com"));
foreach (Cookie co in cookies)
{
  co.Expires = DateTime.Now.Subtract(TimeSpan.FromDays(1));
}

This will expire all cookies for the domain you specify.

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