Grabbing Cookies in Web Browser Control - WP7

Question

In order to log into a certain part of a website the users of my application require their cookie. To do this I need to grab it and pass it to url.

Does anyone know

Answer 1

As @quetzalcoatl already suggested, you can use internal instance of WebRequestCreator to share cookies between browser instances and instances of WebRequest. You don't get to access the cookies directly though, I think that's just a security measure by Microsoft.

This code below creates a WebReqeust object, connected to CookieContainer of WebBrowser instance. It then posts to a url to log in the user and store cookies in the container. After it's done, all browser instances within the app instance will have required set of cookies.

var browser = new WebBrowser();
var brwhttp = typeof (WebRequestCreator).GetProperty("BrowserHttp");
var requestFactory = brwhttp.GetValue(browser, null) as IWebRequestCreate;
var uri = new Uri("https://www.login.com/login-handler");

var req = requestFactory.Create(uri);
req.Method = "POST";

var postParams = new Dictionary { 
    {"username", "turtlepower"}, 
    {"password": "ZoMgPaSSw0Rd1"}
};

req.BeginGetRequestStream(aReq => {

    var webRequest = (HttpWebRequest)aReq.AsyncState;
    using (var postStream = webRequest.EndGetRequestStream(aReq)) {

        // Build your POST request here
        var postDataBuilder = new StringBuilder();
        foreach (var pair in paramsDict) {
            if (postDataBuilder.Length != 0) {
                postDataBuilder.Append("&");
            }
            postDataBuilder.AppendFormat("{0}={1}", pair.Key, HttpUtility.UrlEncode(pair.Value));
        }

        var bytes = Encoding.UTF8.GetBytes(postDataBuilder.ToString());
        postStream.Write(bytes, 0, bytes.Length);
    }

    // Receive response 
    webRequest.BeginGetResponse(aResp => {

        var webRequest2 = (HttpWebRequest) aResp.AsyncState;

        webRequest = (HttpWebRequest)aResp.AsyncState;
        string resp;

        using (var response = (HttpWebResponse)webRequest2.EndGetResponse(aResp)) {
            using (var streamResponse = response.GetResponseStream()) {
                using (var streamReader = new System.IO.StreamReader(streamResponse)) {
                    resp = streamReader.ReadToEnd();
                }
            }
        }

    }, webRequest);
}, req);

One of the issues I couldn't solve though was exceptions thrown when server returns 302 - it seems to throw WebException error with "Not found" description.