使用C＃以编程方式登录网站

Anaya Khan 发表于 Dev

阿纳亚·汗（Anaya Khan）

我想使用C＃登录此网站：这是我的尝试，但它使我进入首页。下一页不返回我，下一页应该在登录后可见，请帮助我解决此问题：

string formParams = 
string.Format("mail={0}&password={1}", [email protected]", "admin");
      string cookieHeader;
      WebRequest req = WebRequest.Create("http://muslimgowns.com/dashboard/login/public_login");
            req.ContentType = "application/x-www-form-urlencoded";
            req.Method = "POST";
            byte[] bytes = Encoding.ASCII.GetBytes(formParams);
            req.ContentLength = bytes.Length;
            using (Stream os = req.GetRequestStream())
            {
                os.Write(bytes, 0, bytes.Length);
            }
            WebResponse resp = req.GetResponse();
            cookieHeader = resp.Headers["Set-cookie"];
            using (StreamReader sr = new  StreamReader(resp.GetResponseStream()))
            {
                string pageSource = sr.ReadToEnd();
                File.AppendAllText("first.txt", pageSource);
            }

            string pageSource1;
            string getUrl = "http://muslimgowns.com/dashboard/home";
            WebRequest getRequest = WebRequest.Create(getUrl);
            getRequest.Headers.Add("Cookie", cookieHeader);
            WebResponse getResponse = getRequest.GetResponse();
            using (StreamReader sr = new StreamReader(getResponse.GetResponseStream()))
            {
                pageSource1 = sr.ReadToEnd();
                File.AppendAllText("second.txt", pageSource1);
            }
        }

奥古兹（Oguz Ozgul）

这似乎是第一个GET请求public_login返回的cookie的数量，以及POST与事后凭证要求必须送到login_access，而不是public_login

使用aHttpWebRequest代替WebRequest并通过设置cookie的cookie容器会有所帮助，实际上服务器会响应HTTP 302 Redirect该POST请求，并HttpWebRequest自动遵循此重定向并下载仪表板。

始终使用http跟踪工具（例如Fiddler或Wireshark或Network Monitor）或浏览器的开发人员工具来查看接收到的内容（cookie，标头等）以及发送回的内容。这就是我得到所有这些的方式。

解决方法是：

string formParams = string.Format("mail={0}&password={1}", "[email protected]", "admin");

CookieContainer cookieContainer = new CookieContainer();

HttpWebRequest req = WebRequest.CreateHttp("http://muslimgowns.com/dashboard/login/public_login");
req.CookieContainer = cookieContainer;
req.GetResponse(); // This is just to get the initial cookies returned by the public_login

req = WebRequest.CreateHttp("http://muslimgowns.com/dashboard/login/login_access");
req.CookieContainer = cookieContainer; // Set the cookie container which contains the cookies returned by the public_login

req.ContentType = "application/x-www-form-urlencoded";
req.Method = "POST";

byte[] bytes = Encoding.ASCII.GetBytes(formParams);
req.ContentLength = bytes.Length;

using (Stream os = req.GetRequestStream())
{
    os.Write(bytes, 0, bytes.Length);
}

WebResponse resp = req.GetResponse();

using (StreamReader sr = new StreamReader(resp.GetResponseStream()))
{
    string pageSource = sr.ReadToEnd();
    File.AppendAllText("first.txt", pageSource); // Dashboard is returned.
}