Question

我试图以编程方式登录网页，我感到非常高兴。我看看小提琴手看看浏览器在做什么，但我很难在代码中复制它。这是迄今为止的代码。

private void VisitUrl()
    {

        string pageVisited = string.Empty;
        CookieContainer cookies = new CookieContainer();


        //Go to login page so that we get a cookie
        HttpWebRequest loginRequest = (HttpWebRequest)HttpWebRequest.Create("http://www.apage.com/login.asp");

        loginRequest.UseDefaultCredentials = true;
        loginRequest.UserAgent = Constants.usrAgentIE8;
        loginRequest.CookieContainer = cookies;
        loginRequest.AllowAutoRedirect = false;

        HttpWebResponse loginResponse = (HttpWebResponse)loginRequest.GetResponse();


        string guid = Regex.Match(loginResponse.Headers["Set-Cookie"], Constants.guidRegex).Value;
        guid = guid.Replace("%2D", "-");

        //Now that we have the cookie we can do a proper login
        HttpWebRequest doLogin = (HttpWebRequest)HttpWebRequest.Create("https://secure.apage.com/express/login.asp");

        //doLogin.UseDefaultCredentials = true;
        doLogin.UserAgent = Constants.usrAgentIE8;
        doLogin.Method = Constants.verbPOST;
        doLogin.ContentType = Constants.contTypeURLenc;
        doLogin.AllowAutoRedirect = false;



        using (StreamWriter sw = new StreamWriter(doLogin.GetRequestStream()))
        {
            sw.Write("usr=user&pass=" + Constants.pass + "&mc=1&guid=" + guid + "&dbnum=0&ic=1&task=dologin&app=library&x=32&y=10");

        }

        doLogin.CookieContainer = cookies;
        doLogin.Referer = "http://www.apage.com/login.asp";

        HttpWebResponse Response = (HttpWebResponse)doLogin.GetResponse();

        string resphead = Response.Headers["Set-Cookie"];

        string resp = Response.StatusCode.ToString();

        using (StreamReader sr = new StreamReader(Response.GetResponseStream()))
        {
            string textresponse = sr.ReadToEnd();

        }


        HttpWebRequest Request = (HttpWebRequest)HttpWebRequest.Create("http://www.apage.com/toc.aspx?id=40729");
        Request.UserAgent = Constants.usrAgentIE8;
        Request.UseDefaultCredentials = true;
        Request.CookieContainer = cookies;

        using (HttpWebResponse urlResponse = (HttpWebResponse)Request.GetResponse())
        {
            using (StreamReader reader = new StreamReader(urlResponse.GetResponseStream()))
            {
                pageVisited = reader.ReadToEnd();

            }

        }

    }

我遇到的问题是，当我尝试第三个请求http://www.apage.com/toc.aspx?id=40729时，它只是缺少一个cookie，而且我似乎回到了登录页面。这是一个使用fiddler浏览器的成功登录：

 1  200 HTTP    CONNECT secure.apage.com:443    0           iexplore:5908           
 2  200 HTTPS   secure.apage.com    /express/login.asp  3,253   private     text/html   iexplore:5908           
 3  200 HTTPS   secure.apage.com    /express/zarketing.css  13,340      text/css    iexplore:5908           
 4  200 HTTPS   secure.apage.com    /express/images/_loadingtext.gif    798     image/gif   iexplore:5908           
 5  200 HTTP    CONNECT secure.apage.com:443    0           iexplore:5908           
 6  200 HTTP    CONNECT secure.apage.com:443    0           iexplore:5908           
 7  200 HTTP    CONNECT secure.apage.com:443    0           iexplore:5908           
 8  200 HTTP    CONNECT secure.apage.com:443    0           iexplore:5908           
 9  200 HTTP    CONNECT secure.apage.com:443    0           iexplore:5908           
 10 200 HTTPS   secure.apage.com    /express/images/_loadingbox1.gif    66      image/gif   iexplore:5908           
 11 200 HTTPS   secure.apage.com    /express/images/_loadingbox5.gif    66      image/gif   iexplore:5908           
 12 200 HTTPS   secure.apage.com    /express/images/_loadingbox4.gif    100     image/gif   iexplore:5908           
 13 200 HTTPS   secure.apage.com    /express/images/_loadingbox2.gif    66      image/gif   iexplore:5908           
 14 200 HTTPS   secure.apage.com    /express/images/_loadingbox3.gif    66      image/gif   iexplore:5908           
 15 302 HTTP    www.apage.com   /authenticate.asp?ticket=2ECCC1686F49BE35E14556E76EFCBF3E478157F89B826A03C421883BE61BB634D8DDDB25F8943414252CE46C27B1FAE837B802A7BD1EE9723ECDCB99B7D3D1DB60FAB3042D0D632BF1C41BA622C2546E&mc=1  142 max-age=0, no-cache, no-store  Expires: Fri, 10 Jun 2011 09:04:21 GMT   text/html   iexplore:5908           
 16 200 HTTP    www.apage.com   /toc.aspx?id=40729  86,179  max-age=0, no-cache, no-store  Expires: Fri, 10 Jun 2011 09:04:22 GMT   text/html; charset=utf-8    iexplore:5908

请求15是重定向，此请求已经缺少cookie，但我不知道如何创建此cookie。我的第二个请求https://secure.apage.com/express/login.asp的响应似乎没有出现，我在调试时看到了。

我是否需要为所有GIF发出请求？

有什么想法吗？

TIA

Answer 1

您是否尝试过使用

doLogin.AllowAutoRedirect = true;

HTTP状态代码302（第15行）显示文件已“暂时移动”。您可能需要允许重定向。

此外，cookie信息也可以在Headers集合属性中传递。在响应的Headers.Keys集合中查找任何名称，例如'cookie'。例如，我必须登录的网站使用名称“Set-Cookie”。我得到了这样的价值：

if (response.Headers["Set-Cookie"] != null)
{
    Match match = Regex.Match(response.Headers["Set-Cookie"].ToString(), @"(?'Name'\w+)
=(?'Value'\w+).+=(?'Path'[\s\S]+)");
    if (match.Success)
    {
        Cookie cookie = new Cookie(match.Groups["Name"].ToString(), 
match.Groups["Value"].ToString(), match.Groups["Path"].ToString(), "domain.name.com");
        cookies.Add(cookie);
    }
}

以编程方式登录网页HTTPS（c＃）

1 个答案: