在C＃中的HttpWebRequest网站标志 [英] C# HttpWebRequest website sign in

问题描述

我试图从Web浏览器控制开关HTTP请求的速度自动执行任务。
有了这个功能，我可以发布数据和接收在页面上登录，但没有饼干返回并添加到饼干名单所以在到下一个请求中传递会话心不是记录。

I am trying to switch from a web browser control to http requests for automating tasks for speed. With this function I can post data and receive a logged in page, but no cookies are returned and added to the cookies list so the logged in session isnt passed on to the next request.

    //an example call        
    test("http://websitename.com/loginpage.php", "username=foo&password=123456");

    private string test(string url, string data)
    {
        string responseFromServer;

        byte[] byteArray;

        Stream dataStream;

        HttpWebRequest request;

        HttpWebResponse response;

        StreamReader reader;


        responseFromServer = string.Empty;

        try
        {
            request = WebRequest.Create(url) as HttpWebRequest;
            request.Method = "POST";
            request.KeepAlive = true;
            request.ContentType = "application/x-www-form-urlencoded";

            byteArray = Encoding.UTF8.GetBytes(data);
            request.ContentLength = byteArray.Length;

            request.CookieContainer = new CookieContainer();

            foreach(Cookie a in cookies)
                request.CookieContainer.Add(a);

            dataStream = request.GetRequestStream();
            dataStream.Write(byteArray, 0, byteArray.Length);
            dataStream.Close();

            response = request.GetResponse() as HttpWebResponse;

            foreach(Cookie a in response.Cookies)
                cookies.Add(a);

            dataStream = response.GetResponseStream();
            reader = new StreamReader(dataStream);
            responseFromServer = reader.ReadToEnd();

            reader.Close();
            dataStream.Close();
            response.Close();
        }
        catch (Exception x)
        {
            x.ToString();
        }

        return responseFromServer;
    }

我怎样才能保持它在？

How can I keep it logged in?

推荐答案

这是最后的答案：

string url = "http://www.ABC/MemberShip/Login.aspx";// HttpContext.Current.Request.Url.AbsoluteUri.ToString().Replace("AutoLogin", "Login");

CookieContainer myCookieContainer = new CookieContainer();
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.CookieContainer = myCookieContainer;
request.Method = "GET";
request.KeepAlive = false;

HttpWebResponse response = request.GetResponse() as HttpWebResponse;

System.IO.Stream responseStream = response.GetResponseStream();
System.IO.StreamReader reader = new System.IO.StreamReader(responseStream, Encoding.UTF8);
string srcString = reader.ReadToEnd();

// get the page ViewState                
string viewStateFlag = "id=\"__VIEWSTATE\" value=\"";
int i = srcString.IndexOf(viewStateFlag) + viewStateFlag.Length;
int j = srcString.IndexOf("\"", i);
string viewState = srcString.Substring(i, j - i);

// get page EventValidation                
string eventValidationFlag = "id=\"__EVENTVALIDATION\" value=\"";
i = srcString.IndexOf(eventValidationFlag) + eventValidationFlag.Length;
j = srcString.IndexOf("\"", i);
string eventValidation = srcString.Substring(i, j - i);

string submitButton = "LoginButton";

// UserName and Password
string userName = "userid";
string password = "password";
// Convert the text into the url encoding string
viewState = System.Web.HttpUtility.UrlEncode(viewState);
eventValidation = System.Web.HttpUtility.UrlEncode(eventValidation);
submitButton = System.Web.HttpUtility.UrlEncode(submitButton);

// Concat the string data which will be submit
string formatString =
         "txtUserName={0}&txtPassword={1}&btnSignIn={2}&__VIEWSTATE={3}&__EVENTVALIDATION={4}";
string postString =
         string.Format(formatString, userName, password, submitButton, viewState, eventValidation);

// Convert the submit string data into the byte array
byte[] postData = Encoding.ASCII.GetBytes(postString);

// Set the request parameters
request = WebRequest.Create(url) as HttpWebRequest;
request.Method = "POST";
request.Referer = url;
request.KeepAlive = false;
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; CIBA)";
request.ContentType = "application/x-www-form-urlencoded";
request.CookieContainer = myCookieContainer;
System.Net.Cookie ck = new System.Net.Cookie("TestCookie1", "Value of test cookie");
ck.Domain = request.RequestUri.Host;
request.CookieContainer.Add(ck);
request.CookieContainer.Add(response.Cookies);

request.ContentLength = postData.Length;

// Submit the request data
System.IO.Stream outputStream = request.GetRequestStream();
request.AllowAutoRedirect = true;
outputStream.Write(postData, 0, postData.Length);
outputStream.Close();


// Get the return data
response = request.GetResponse() as HttpWebResponse;
responseStream = response.GetResponseStream();
reader = new System.IO.StreamReader(responseStream, Encoding.UTF8);
srcString = reader.ReadToEnd();
Response.Write(srcString);
Response.End();

这篇关于在C＃中的HttpWebRequest网站标志的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！