使用c＃/ ASP.NET以编程方式伪造登录到网站

Question

因此，我正在尝试模拟多个登录，同时在我们的公司网站上生成异常，以便测试我们的日志框架（我们认为可能存在线程同步问题）。 无论如何，所以我需要以编程方式登录我们的网站。 这是我到目前为止所拥有的：

        // Block 1
        Uri url = new Uri("http://withheld");
        HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
        request.Method = "GET";
        HttpWebResponse response = request.GetResponse() as HttpWebResponse;
        string viewState = string.Empty;
        string previousPage = string.Empty;
        string eventValidation = string.Empty;
        using (StreamReader reader = new StreamReader(response.GetResponseStream()))
        {
            string strResponse = reader.ReadToEnd();
            viewState = HttpUtility.UrlEncode(GetTagValue(strResponse, "__VIEWSTATE"));
            previousPage = HttpUtility.UrlEncode(GetTagValue(strResponse, "__PREVIOUSPAGE"));
            eventValidation = HttpUtility.UrlEncode(GetTagValue(strResponse, "__EVENTVALIDATION"));
        }


        // Block 2
        string username = "user01";
        string password = "password99";
        HttpWebRequest request2 = WebRequest.Create(url) as HttpWebRequest;
        request2.KeepAlive = true;
        request2.Method = "POST";
        request2.ContentType = "application/x-www-form-urlencoded";
        string postData = string.Format("__LASTFOCUS=&ctrlCreateNewPassword_scriptManagerMaster_HiddenField=&__EVENTTARGET=&__EVENTARGUMENT=&__VIEWSTATE={0}&__PREVIOUSPAGE={1}&__EVENTVALIDATION={2}&UserName={3}&Password={4}&LoginButton=Log+in", new string[] { viewState, previousPage, eventValidation, username, password});
        byte[] dataBytes = UTF8Encoding.UTF8.GetBytes(postData);
        request2.ContentLength = dataBytes.Length;
        using (Stream postStream = request2.GetRequestStream())
        {
            // Here's the problem
            postStream.Write(dataBytes, 0, dataBytes.Length);
        }
        HttpWebResponse httpResponse = request2.GetResponse() as HttpWebResponse;
        // At this point httpResponse.Cookies is null
        // I believe it's because the line above has actually initiated another
        // request/response which DOES NOT include the authentication cookie.
        // See fiddler output below to understand why I think that.


        // Block 3
        //Uri url2 = new Uri("http://Withheld/GenerateException.aspx");
        //http = WebRequest.Create(url2) as HttpWebRequest;
        //http.CookieContainer = new CookieContainer();
        //http.CookieContainer.Add(httpResponse.Cookies);
        //HttpWebResponse httpResponse2 = http.GetResponse() as HttpWebResponse;

看起来相当简单吧？ 好吧它不起作用。 我不知道我是否需要viewState和whatnot或not，但我想我会模仿常规浏览器尽可能接近的程度。

我可以告诉附近发生的事情是这样的：

1. 我们用简单的GET命中了页面。 这给了我们viewstate等，它被解析出来包含在下面的请求中。
2. 我们现在使用postStream.Write（）将viewstate，username，password等发布到服务器。 此时服务器使用身份验证cookie进行响应，并将我们转发到/Default.aspx。
3. 现在我们执行reqest2.GetResponse（），但是没有得到将我们转发给/default.aspx的响应并且拥有身份验证cookie，看起来这行实际上导致了另一个请求来获取/default.aspx中的资源。 问题是httpWebResponse不包括我们下一个请求所需的身份验证cookie（当前已注释掉）。

为什么？ 为什么这个在这个庄园中表现，我该如何正确处理它。 这是fiddler的输出，以进一步解释发生了什么：

块1生成此请求/响应请求标头：

GET http://withheld/Login.aspx HTTP/1.1
Host: withheld
Connection: Keep-Alive

响应标题：

HTTP/1.1 200 OK
Connection: close
Date: Mon, 04 Feb 2013 16:37:37 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Set-Cookie: .EXTASPXAUTH=; expires=Tue, 12-Oct-1999 04:00:00 GMT; path=/; HttpOnly
Cache-Control: private, no-cache="Set-Cookie"
Content-Type: text/html; charset=utf-8
Content-Length: 16975
Response is the actual login webpage.  Omitted for obvious reasons.

单步执行代码，在调用postStream.Write之后立即生成此请求/响应：

请求：

POST http://Withheld/Login.aspx HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Host: withheld
Content-Length: 2109
Expect: 100-continue

__LASTFOCUS=&ctrlCreateNewPassword_scriptManagerMaster_HiddenField=&__EVENTTARGET=&__EVENTARGUMENT=&__VIEWSTATE=%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%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%3d&__PREVIOUSPAGE=1aYW5DqTKrT4ieGPkHcnrQLIq8lEcSIVkql1EugwSQNV_5102t5D7QDmOnuQFA4Tz9Mh5-CEYpkRngMROFFeeAG12Ss1&__EVENTVALIDATION=%2fwEWCQKKr%2bXcBgKvruq2CALSxeCRDwL%2bjNCfDwKH8YSKBgKN6O7XCwKz9P38DALl3I74DwLWxI74D6Nz%2f2bCBFC%2bM9glZmEyM%2byOCTZg&UserName=user01&Password=password99&LoginButton=Log+in

响应：

HTTP/1.1 302 Found
Connection: close
Date: Mon, 04 Feb 2013 16:36:55 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Location: /Default.aspx?locale=en
Set-Cookie: .EXTASPXAUTH=65BB5BFDD274F730E26CAEAAEB417792A764E7B8E8C6C9AC8C47FA97EF35DFACF551A53EAA6EA67D868C8A9BF55EBA758A5E724C58269028EE48F56268A204CBED19B60FC1AF58892989D9546202C037E97BF0EEE6A6281FF5EEA461BC30C5C7A71DFD64027AEB796D3FD21AE97ECFB16FF0F95C; path=/; HttpOnly
Cache-Control: private, no-cache="Set-Cookie"
Content-Type: text/html; charset=utf-8
Content-Length: 140

<html><head><title>Object moved</title></head><body>
<h2>Object moved to <a href="/Default.aspx?locale=en">here</a>.</h2>
</body></html>

请注意，上述响应包括身份验证cookie。 现在我们运行以下代码行以获取该cookie：

HttpWebResponse httpResponse = request2.GetResponse() as HttpWebResponse;

但是在fiddler中生成以下请求/响应：

请求：

GET http://withtheld/Default.aspx?locale=en HTTP/1.1
Content-Type: application/x-www-form-urlencoded
Host: withheld

响应：

HTTP/1.1 302 Found
Connection: close
Date: Mon, 04 Feb 2013 16:37:38 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
Location: /Login.aspx?ReturnUrl=%2fDefault.aspx%3flocale%3den&locale=en
Cache-Control: private
Content-Type: text/html; charset=utf-8
Content-Length: 182

<html><head><title>Object moved</title></head><body>
<h2>Object moved to <a href="/Login.aspx?ReturnUrl=%2fDefault.aspx%3flocale%3den&amp;locale=en">here</a>.</h2>
</body></html>

我相信这是httpResponse现在包含的响应。 如何在登录完成后实际获取cookie以请求另一个受保护的页面？

谢谢！

Answer 1

事实证明我在这里有两个问题。 一个是我需要称之为：

request.AllowAutoRedirect = false

这使得框架不会仅仅跳过包含身份验证cookie的响应，而实际上会回放我们感兴趣的响应。

另一个问题是您必须创建CookieContainer的新实例并将其分配给请求。 没有完成，Response.Cookies不包含cookie。 一旦您分配了自己的容器，就会在响应完成后填充它。 我不知道为什么。

Answer 2

登录时，身份验证令牌将作为cookie从服务器发送到您的客户端。 您需要存储此cookie，然后在每个将来的请求中重新发送它。 重新发送cookie告诉服务器您已经过认证为某个用户。

要获取登录后发送的cookie，请执行以下操作：

HttpCookieCollection loginResponseCookies = Response.Cookies;

此集合将包括身份验证cookie，任何会话cookie等。

然后，只需在每个后续请求中重新发送这些cookie，服务器就会对您进行身份验证。

foreach(HttpCookie loginResponseCookie in loginResponseCookies)
{
    Response.Cookies.Add(loginResponseCookie);
}