我正在使用C#开发一个项目的应用程序,我需要在网站上的POST请求后获取cookie。我正在使用HttpWebResponse来获取我的请求的结果。我的问题是CookieCollection是空的,我不知道为什么。是否可能不出现cookie,因为它是HTTPOnly cookie?
这是我的整个POST请求的代码:
private void RequestPOST(string uri)
{
Uri myUri = new Uri(uri);
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(myUri);
myRequest.Method = "POST";
myRequest.ContentType = "application/x-www-form-urlencoded";
Debug.WriteLine("RequestStream : BEGIN");
myRequest.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), myRequest);
}
private void GetRequestStreamCallback(IAsyncResult callbackResult)
{
HttpWebRequest myRequest = (HttpWebRequest)callbackResult.AsyncState;
Stream postStream = myRequest.EndGetRequestStream(callbackResult);
byte[] byteArray = Encoding.UTF8.GetBytes(this._postData);
postStream.Write(byteArray, 0, byteArray.Length);
postStream.Close();
myRequest.BeginGetResponse(new AsyncCallback(GetResponsetStreamCallback), myRequest);
}
private void GetResponsetStreamCallback(IAsyncResult callbackResult)
{
HttpWebRequest request = (HttpWebRequest)callbackResult.AsyncState;
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(callbackResult);
CookieCollection cookies = response.Cookies;
using (StreamReader httpWebStreamReader = new StreamReader(response.GetResponseStream()))
{
this._retourPost = httpWebStreamReader.ReadToEnd();
Debug.WriteLine(cookies.Count);//My problem appears here, cookieCount throws a NullException
foreach (Cookie cook in response.Cookies)
{
Debug.WriteLine(cook.Name + " : "+ cook.Value);
}
}
Debug.WriteLine("END");
}
我知道已经存在一些类似的问题,但我仍然无法使我的应用程序正常运行。
我希望我的问题很明确。
谢谢。
答案 0 :(得分:0)
我终于找到了为什么它不起作用:我忘了声明HttpWebRequest的cookiecontainer。因此,我使用本地字段来保存CookieContainer,并在每次调用RequestPOST()时重复使用它。
private CookieContainer cookiecontainer = new CookieContainer();
private void RequestPOST(string uri)
{
Uri myUri = new Uri(uri);
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(myUri);
myRequest.Method = "POST";
myRequest.ContentType = "application/x-www-form-urlencoded";
myRequest.CookieContainer = this.cookiecontainer;
Debug.WriteLine("RequestStream : BEGIN");
myRequest.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), myRequest);
}
实际上我不必阅读HTTPOnly cookie,我只需要拥有它。 CookieContainer仍然没有显示cookie,因为HTTPOnly cookie没有在容器中引用,但无论如何它们都在其中。
我希望它会有所帮助。