C#:发布登录数据以形成和处理网站的响应

时间:2013-10-10 20:40:19

标签: c# forms post webrequest webresponse

我正在尝试编写一个C#程序,以延长我在大学图书馆的书籍的截止日期。我想做的是以下内容: 1.)通过WebRequest& amp;登录图书馆网站POST方法,用户名和&在C#程序中输入的密码 2.)获取包含加密密码&的“查看借来的图书”网站的网址。纯文本用户名为GET参数 3.)下载命名页面的内容以在C#程序中显示给用户 4.)如果用户按下程序中的相应按钮,请将延长表单提交到网站,以便立即延长所有媒体。

现在我被困在1和2之间,我似乎能够连接到网站并输入用户数据,但我得到的WebResponse再次是登录页面(如果你手动登录则不是这种情况)在网站上)。

这是我写的连接网站的方法:

// Login function, logs the user in, uses passed user number & password
    public static Boolean userLogin(String unr, String pass)
    {
        // Login
        // Cookie needed for maintaining php session
        CookieContainer cContainer = new CookieContainer();
        Console.WriteLine(unr+","+pass);
        String postUrl = "https://universitylibrary.com/loan/DB=4/LNG=DU/USERINFO_LOGIN";
        String formParams = String.Format("ACT={0}&HOST_NAME={1}&HOST_PORT={2}&HOST_SCRIPT={3}&LOGIN={4}&STATUS={5}&BOR_U={6}&BOR_PW={7}","UI_DATA","","","","KNOWNUSER","HML_OK", unr, pass);
        String cookieHeader;
        WebRequest wreq = WebRequest.Create(postUrl);
        wreq.ContentType = "application/x-www-form-urlencoded";
        wreq.Method = "POST";
        byte[] bytes = Encoding.ASCII.GetBytes(formParams);
        wreq.ContentLength = bytes.Length;
        using (Stream os = wreq.GetRequestStream())
        {
            os.Write(bytes, 0, bytes.Length);
        }
        WebResponse resp = wreq.GetResponse();
        cookieHeader = resp.Headers["Set-cookie"];

        //Authentication trial
        String PageSource;
        String getUrl = "https://universitylibrary.com:443/loan/DB=4/USERINFO";
        WebRequest getReq = WebRequest.Create(getUrl);
        getReq.Headers.Add("Cookie",cookieHeader);
        WebResponse getResp = getReq.GetResponse();
        using (StreamReader sr = new StreamReader(getResp.GetResponseStream()))
        {
            PageSource = sr.ReadToEnd();
        }
        Console.Write(PageSource);
        return true;
    }
你能看出我的错误吗?我在控制台上获得了源代码和params(用户名,密码)输出,但输出又是登录页面。 我只看一下php页面,但我无法访问任何内部系统数据,我只有HTML页面。

任何建议都将受到高度赞赏!

编辑:

我重新思考了整个事情,并完全重建了fiddler记录的HTTP请求标头。该部分功能现在看起来像这样:

 // Login
        // Cookie needed for maintaining php session
        CookieContainer cContainer = new CookieContainer();
        HttpCookie cookie = new HttpCookie("cookie", "PSC_4='xxxxxxx'; DB='n'");
        CookieCollection cookieCol = new CookieCollection();
        cookieCol.Add(cookieCol);
        cContainer.Add(cookieCol);
        Console.WriteLine(unr+","+pass);
        String postUrl = "https://universitylibrary.com:443/loan/DB=4/USERINFO";
        String formParams = String.Format("ACT={0}&HOST_NAME={1}&HOST_PORT={2}&HOST_SCRIPT={3}&LOGIN={4}&STATUS={5}&BOR_U={6}&BOR_PW={7}","UI_DATA","","","","KNOWNUSER","HML_OK", unr, pass);
        String cookieHeader;
        HttpWebRequest wreq = (HttpWebRequest) WebRequest.Create(postUrl);
        wreq.Referer = "https://universitylibrary.com/loan/DB=4/LNG=DU/USERINFO_LOGIN";
        wreq.KeepAlive = true;
        wreq.ContentLength = 119;
        wreq.Host = "universitylibrary.com";
        wreq.ContentType = "application/x-www-form-urlencoded";
        wreq.Method = "POST";
        wreq.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0";
        wreq.Accept = "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
        wreq.SendChunked = true;
        wreq.TransferEncoding = "gzip, deflate";
        byte[] bytes = Encoding.ASCII.GetBytes(formParams);
        wreq.ContentLength = bytes.Length;
        using (Stream os = wreq.GetRequestStream())
        {
            os.Write(bytes, 0, bytes.Length);
        }
        cookieHeader = "";
        try
        {
            HttpWebResponse resp = (HttpWebResponse) wreq.GetResponse();
            cookieHeader = resp.Headers["Set-cookie"];
        }
        catch (WebException ex)
        {
            Console.WriteLine(ex.Status);
            Console.WriteLine(ex.Response);
        }

但是整个事情仍然不起作用,和以前一样。 是否可能HttpWebRequest无法处理https或者其他内容缺少https才能工作? (HTTP& HTTPS似乎在语法上是相同的,端口正确设置为443,真正的区别似乎在于额外的SSL / TLS层,也许我需要在某处添加它?)

2 个答案:

答案 0 :(得分:1)

当您返回登录页面时,可能意味着您未经过正确的身份验证。这可能有几个原因,但最终是因为您没有正确地通过网站上的手动登录来镜像HTTP通信。

我通常做的是使用Fiddler等监视器从手动登录中捕获完整的请求/响应模式,然后我可以在我的代码中镜像。

答案 1 :(得分:-1)

您可以在检查登录数据后修改登录页面,并使唯一的输出为“SuccessfullySignIn”。 如果这是您收到的数据,     $ if(getReq ==“SuccessfullySignIn”)     {     //做一点事     } 并尝试在您的网页中使用重定向功能