在 Windows Phone 7 (Mango) 上的 HttpWebRequest 之间共享 CookieContainer 时出现问题

Question

我有一个生产应用程序，它通过 HttpWebRequest 进行两次调用。第一个调用设置会话并接收返回的 cookie 以维持会话，第二个调用用于获取来自 api 的数据。响应是 httponly。我在两个调用之间使用共享的 CookieContainer，但第二个调用总是失败。我将问题范围缩小到第二个请求中未发送 cookie。我使用网络监视器来监视流量，如果我在第二个请求中显式设置 cookie（请参阅下面的代码），则调用会成功。有人对这个问题有什么想法吗？我需要弄清楚如何让它与共享 CookieContainer 一起工作。

private string URL_01 = "https:// [...]";
private string URL_02 = "https:// [...]";
private CookieContainer _cookieContainer = new CookieContainer();
private NetworkCredential nc = new NetworkCredential("username", "password");

private void MainPage_Loaded(object sender, RoutedEventArgs e)
{
HttpWebRequest request = HttpWebRequest.CreateHttp(URL_01);
request.CookieContainer = _cookieContainer;
request.Credentials = nc;
request.UseDefaultCredentials = false;
request.BeginGetResponse(new AsyncCallback(HandleResponse), request);
}

public void HandleResponse(IAsyncResult result)
{
HttpWebRequest request = result.AsyncState as HttpWebRequest;

if (request != null)
{
    using (WebResponse response = request.EndGetResponse(result))
    {
         using (StreamReader reader = new StreamReader(response.GetResponseStream()))
         {
             string data = reader.ReadToEnd();

             // gets returned data and deserializes it to an object
             SessionObject so = JsonConvert.DeserializeObject<SessionObject>(data);

             if (so.DeviceAPI.Session == "true")
             {
                // make a second call for the data
                HttpWebRequest requestData = HttpWebRequest.CreateHttp(URL_02);

                // when this is used, the call fails
                requestData.CookieContainer = _cookieContainer;

                // when this is used, the call works
                //requestData.Headers[HttpRequestHeader.Cookie] = "_key=value; _secret=value";

                requestData.Credentials = nc; 
                requestData.BeginGetResponse(new AsyncCallback(DataResponse), requestSongData);
                    }
                }
            }
        }
    }

    public void DataResponse(IAsyncResult DataResult)
    {
        HttpWebRequest requestData = DataResult.AsyncState as HttpWebRequest;

        if (requestData != null)
        {

            using (WebResponse dataResponse = requestData.EndGetResponse(DataResult))
            {
                using (StreamReader reader = new StreamReader(dataResponse.GetResponseStream()))
                {
                    string data = reader.ReadToEnd();
                    // do something with the data
                }
            }
        }
    }
}

}

Answer 1

当域名上没有“www”时，此问题是 CookieContainer 的一个已知问题。 CookieContainer 需要一个“www”，并且不识别该域的现有 cookie。

解决方法是从响应标头中读取 cookie，并将它们添加到任何其他请求中。

曾考虑修复 Mango，但被排除在外。

杰夫

Answer 2

我遇到了他的问题，似乎是使用旧的饼干容器。只需通过迭代旧的 cookie 并创建新的 cookie 来创建新的 cookie。

步骤 1. 创建一个字典来存储 cookie。

//create a dictionary to store your persistent cookies
public static Dictionary<string, Cookie> CookieCollection { get; set; }

步骤 2. 在发送 Web 请求之前将您存储的 Cookie 添加到该请求中。

var request = WebRequest.Create(...);

//add the cookies you have in your persistent cookie jar

foreach (KeyValuePair<string, Cookie> cookie in _collection)
            {
                try
                {
                    request.CookieContainer.Add(request.RequestUri, new Cookie(cookie.Value.Name, cookie.Value.Value));
                }
                catch
                {
                }
            }

步骤 3. 保存Cookies

ResponseCallback(...)
{

//update your local cookie list as required
   foreach (Cookie clientcookie in response.Cookies)
            {
                if (!_collection.ContainsKey(clientcookie.Name))
                    _collection.Add(clientcookie.Name, clientcookie);
                else
                    _collection[clientcookie.Name] = clientcookie;
            }
}