Question

我正在尝试获取标头“Set-Cookie”或访问cookie容器，但Set-Cookie标头不可用。 cookie位于响应头中，但它不在客户端请求对象中。我正在使用

注册ClientHttp堆栈

bool httpResult = WebRequest.RegisterPrefix("http://", WebRequestCreator.ClientHttp);

以下是回复：

HTTP/1.1 200 OK
Content-Type: application/xml; charset=utf-8
Connection: keep-alive
Status: 200
X-Powered-By: Phusion Passenger (mod_rails/mod_rack) 3.0.0.pre4
ETag: "39030a9c5a45a24e485e4d2fb06c6389"
Client-Version: 312, 105, 0, 0
X-Runtime: 44
Content-Length: 1232
Set-Cookie: _CWFServer_session=[This is the session data]; path=/; HttpOnly
Cache-Control: private, max-age=0, must-revalidate
Server: nginx/0.7.67 + Phusion Passenger 3.0.0.pre4 (mod_rails/mod_rack)

<?xml version="1.0" encoding="UTF-8"?>
<user>
...
</user>

我的回调代码包含以下内容：

var webRequest = (HttpWebRequest)result.AsyncState;
raw = webRequest.EndGetResponse(result) as HttpWebResponse;
foreach (Cookie c in webRequest.CookieContainer.GetCookies(webRequest.RequestUri))
{
    Console.WriteLine("Cookie['" + c.Name + "']: " + c.Value);
}

我也试过查看标题，但响应中也没有Set-Cookie标题。

关于可能出现什么问题的任何建议？

Answer 1

尝试显式传递新的CookieContainer：

CookieContainer container = new CookieContainer();
container.Add(new Uri("http://yoursite"), new Cookie("name", "value"));
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://yoursite");
request.CookieContainer = container;
request.BeginGetResponse(new AsyncCallback(GetData), request);

Answer 2

您正在接收HttpOnly cookies：

Set-Cookie: _CWFServer_session=[This is the session data]; path=/; HttpOnly

出于安全原因，无法从代码访问这些cookie，但您仍可以在下次调用HttpWebRequest时使用它们。更多相关信息：Reading HttpOnly Cookies from Headers of HttpWebResponse in Windows Phone

使用WP7.1，我在阅读非HttpOnly cookie时也遇到了问题。我发现如果HttpWebRequest的响应来自缓存，它们就不可用。使用随机数使查询唯一可以解决缓存问题：

// The Request
Random random = new Random();  
// UniqueQuery is used to defeat the cache system that destroys the cookie.
_uniqueQuery = "http://my-site.somewhere?someparameters=XXX"
       + ";test="+ random.Next();

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(_uniqueQuery);
request.BeginGetResponse(Response_Completed, request);

获得响应后，您可以从响应标头中获取cookie：

void Response_Completed(IAsyncResult result)
{
    HttpWebRequest request = (HttpWebRequest)result.AsyncState;
    HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(result);
    String header = response.Headers["Set-Cookie"];

我从来没有设法让CookieContainer.GetCookies（）方法起作用。

Answer 3

cookie是否为httponly？如果是这样，您将无法看到它，但如果您为第二个请求使用相同的CookieContainer，请求将包含cookie，即使您的程序将无法看到它。

Answer 4

您必须直接编辑标题集合。像这样：

request.Headers["Set-Cookie"] = "name=value";

request.BeginGetResponse(myCallback, request);

响应未解析的HttpWebRequest和Set-Cookie标头（WP7）

4 个答案: