C# 跨网页保存 cookie 和会话

Question

我在此处和 Google 中尝试了很多示例，但仍然无法保存我的登录信息。我已经调试并看到它发送了 302 重定向并且我的登录成功了。我相信。然后我将它发送到下一页，但保留从登录响应中获得的 cookie。但我仍然注销。除了 urls 和登录信息之外，这是我的代码。我已经验证了我的 POST 参数。我首先请求会话 cookie，然后登录，然后继续到重定向页面。非常感谢所有帮助，这是一个令人头疼的问题。

    HttpWebRequest GetRequest(string Site, CookieContainer Cookies, string SendType)
    {

        HttpWebRequest request = WebRequest.Create(Site) as HttpWebRequest;
        request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.134 Safari/537.36";
        request.CookieContainer = Cookies; // Assign it some cookies 
        request.ContentType = "application/x-www-form-urlencoded";
        request.Method = SendType; 
        return request; 
    }

    private string GetLoggedInPage(string username, string password, string loginPage, string redirectPage)
    {

        string formParams = string.Format("login={0}&password={1}", username, password);

        // cookies to use for multiple requests
        var cookies = new CookieContainer(); // Create cookies!



        var request= GetRequest(loginPage, cookies, "POST");


        //Send params off 
        byte[] bytes = Encoding.ASCII.GetBytes(formParams);

        using (Stream loginStream = request.GetRequestStream())
        {
            loginStream.Write(bytes, 0, bytes.Length);
        }



        request.GetResponse().Dispose(); // removed some code here, no need to read response manually



        request= GetRequest(redirectPage, cookies, "GET");



        using (WebResponse getResponse = request.GetResponse())
        {
            using (StreamReader sr = new StreamReader(getResponse.GetResponseStream()))
            {
                var result = sr.ReadToEnd();//Read logged in webpage
                return  Convert.ToString(result); 
            }

        }


        return "<Html></html>"; //Return blank page in case the using above didn't work correctly. 



    }

下面的代码已经过重构并且可以正常工作。我听从了下面 KoBE 的建议，但仍然没有用。问题原来是针对框架 4.5.2 我针对 4.0 和以下功能工作。只需向 GetLoggedInPage 发送您的用户名、密码和登录名 url 以及目标 url，它就会返回一个字符串。我要把它变成 class 并使用它。

记得保存你的饼干人！

void WriteParams(string Params, HttpWebRequest webrequestStream)
{
    byte[] bytes = Encoding.ASCII.GetBytes(Params);


    using (Stream requestStream = webrequestStream.GetRequestStream())
    {
        requestStream.Write(bytes, 0, bytes.Length);
    }


}


 HttpWebRequest GetRequest(string Site, ref CookieContainer Cookies, string SendType)
{

    HttpWebRequest request = WebRequest.Create(Site) as HttpWebRequest;
    request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.134 Safari/537.36";
    request.CookieContainer = Cookies; // Assign it some cookies 
    request.ContentType = "application/x-www-form-urlencoded";
    request.Method = SendType; 
    return request; 
}

private string GetLoggedInPage(string username, string password, string loginPage, string redirectPage)
{

    string formParams = string.Format("login={0}&password={1}", username, password);

    // cookies to use for multiple requests
    var cookies = new CookieContainer(); // Create cookies!



    HttpWebRequest request= GetRequest(loginPage, ref cookies, "POST");


    //Send params off 

    WriteParams(formParams, request);


    request.GetResponse();// .Dispose(); // removed some code here, no need to read response manually



    request= GetRequest(redirectPage, ref cookies, "GET");



    using (WebResponse getResponse = request.GetResponse())
    {
        using (StreamReader sr = new StreamReader(getResponse.GetResponseStream()))
        {
            var result = sr.ReadToEnd();//Read logged in webpage
            return  Convert.ToString(result); 
        }

    }


    return "<Html></html>"; //Return blank page in case the using above didn't work correctly. 



}

Answer 1

编辑：我终于看了你的代码。看起来您只是缺少用户代理。请在底部查看您修改后的代码。

首先，我要更改的是：

var cookies = new CookieContainer(); // Create cookies!
TheRequest.CookieContainer = new CookieContainer();

为此：

var cookies = new CookieContainer(); // Create cookies!
TheRequest.CookieContainer = cookies;

这将使您不再需要：

foreach (Cookie c in TheResponse.Cookies)//Get response cookie
{
    cookies.Add(c);
}
TheRequest.CookieContainer = cookies;

无需创建两个cookie容器，然后从一个容器复制到另一个，只需将原始版本设置为复制版本即可。

我不确定，但这可以解决您的问题，具体取决于 CookieContainer 在后台实际为 Uri 特定 cookie 做了多少工作，或者您有什么。

https://www.pucatrade.com/dashboard 是您使用的 url 吗？另外，您为什么要尝试多次登录？

修改代码

string username = "your-user";
string pass = "your-pass";
string loginPage = "https://pucatrade.com/login";
string redirectPage = "https://pucatrade.com/dashboard";
string formParams = string.Format("login={0}&password={1}", username, pass);

// cookies to use for multiple requests
var cookies = new CookieContainer(); // Create cookies!

var request = WebRequest.Create(loginPage) as HttpWebRequest;
request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.134 Safari/537.36";
request.CookieContainer = cookies; // Assign it some cookies 
request.ContentType = "application/x-www-form-urlencoded";
request.Method = "POST";
byte[] bytes = Encoding.ASCII.GetBytes(formParams);
request.ContentLength = bytes.Length;
using (Stream loginStream = request.GetRequestStream())
{
    loginStream.Write(bytes, 0, bytes.Length);
}

request.GetResponse().Dispose(); // removed some code here, no need to read response manually

request = WebRequest.Create(redirectPage) as HttpWebRequest; //we know we get redirected too here, so just go there. 
request.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.134 Safari/537.36";
request.CookieContainer = cookies; // Assign it some cookies 
request.Method = "GET";

using (WebResponse getResponse = request.GetResponse())
{
    using (StreamReader sr = new StreamReader(getResponse.GetResponseStream()))
    {
        var result = sr.ReadToEnd();//Read logged in webpage
    }
}

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