Automatic Cookie Handling C#/.Net Httpwebrequest+Httpwebresponse

Automatic Cookie Handling C#/.NET HttpWebRequest+HttpWebResponse

I think what you're looking for is the CookieContainer class. If I understand what you're trying to do correctly, you have separate objects for request & response, and you want to transfer the response cookie collection into the next request cookie collection automatically. Try using this code:

CookieContainer cookieJar = new CookieContainer();
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://www.google.com");
request.CookieContainer = cookieJar;

HttpWebResponse response = (HttpWebResponse)request.GetResponse();
int cookieCount = cookieJar.Count;

Once you create a cookieJar and set it to the request's CookieContainer, it will store any cookies that come from the response, so in the example above, the cookie jar's count will be 1 once it visits Google.com. The cookie container properties of the request & response above will store a pointer to the cookieJar, so the cookies are automatically handled and shared between the objects.

How to send cookie with HttpWebRequest in c#

You need to set the cookie container of the HTTP request. Add the following line after you create the HtppWebRequest.

myReq.CookieContainer = gaCookies

how to use cookies with HttpWebRequest

CookieContainer cookieContainer = new CookieContainer();
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(...);
httpWebRequest.CookieContainer = cookieContainer;

Then you reuse this CookieContainer in subsequent requests:

HttpWebRequest httpWebRequest2 = (HttpWebRequest)WebRequest.Create(...);
httpWebRequest2.CookieContainer = cookieContainer;

How to get HttpWebRequest.AllowAutoRedirect to set the cookies when doing a GET/POST on the redrected page?

I know to make separate requests (ie. different HttpRequest objects) work with cookies, you need to set the HttpRequest.CookieContainer property on both requests to the same instance of a CookieContainer. You might need that for this case as well.

HttpWebResponse.Cookies empty despite Set-Cookie Header (no-redirect)

UPDATE five years later, someone actually mentioned the correct way to do it: setting up the CookieContainer correctly in the first place and letting it handle everything. Please refer to Sam's solution further down.

I've found that issue as well, when reading Cookies in C# that were created by a C# ASP.NET app... ;)

Not sure if it has to do with it, but I found that the two Cookies that are set in my case are written in a single Set-Cookie header, with the cookie payload separated by commas. So I adapted AppDeveloper's solution to deal with this multiple-cookie issue, as well as fixing the name/value thing I mentioned in the comments.

private static void fixCookies(HttpWebRequest request, HttpWebResponse response) 
{
    for (int i = 0; i < response.Headers.Count; i++)
    {
        string name = response.Headers.GetKey(i);
        if (name != "Set-Cookie")
            continue;
        string value = response.Headers.Get(i);
        foreach (var singleCookie in value.Split(','))
        {
            Match match = Regex.Match(singleCookie, "(.+?)=(.+?);");
            if (match.Captures.Count == 0)
                continue;
            response.Cookies.Add(
                new Cookie(
                    match.Groups[1].ToString(), 
                    match.Groups[2].ToString(), 
                    "/", 
                    request.Host.Split(':')[0]));
        }
    }
}

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