从一个页面获取cookie，用于post数据到另一个页面，cookie怎么处理？

Question

这个例子很特殊（一般都情况下访问页面访问会产生cookie，带着cookie post就完了）：这个需要先通过访问MainUrl在客户端留下cookie，然后在VoteUrl投票需要带上这个cookie才能完成投票，若客户端直接访问VoteUrl，改页面不产生cookie，就无法完成投票。需要实现的是，通过按钮每次获取新的cookie进行投票。

我不知道那些地方该该注释掉，哪些地方该改？再次感谢版主！

using System;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;

namespace AutoVote
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
        }

        private void Vote(string MainUrl, string VoteUrl,string PostData)
        {
            UTF8Encoding encoding = new UTF8Encoding();
            byte[] data = encoding.GetBytes(PostData);
            //定义Cookie容器
            //CookieContainer cc = new CookieContainer();
            //创建Http请求获取cookie
            HttpWebRequest GetcookieRequest = (HttpWebRequest)WebRequest.Create(MainUrl);
            GetcookieRequest.CookieContainer = cc;
            HttpWebResponse response = (HttpWebResponse)GetcookieRequest.GetResponse();
            cc.Add(response.Cookies);
            //创建Http请求。。。
            HttpWebRequest PostRequest = (HttpWebRequest)WebRequest.Create(VoteUrl);
            PostRequest.Method = "POST";
            PostRequest.ContentType = "application/x-www-form-urlencoded";
            PostRequest.ContentLength = PostData.Length;
            //PostRequest.CookieContainer = cc;
            PostRequest.Referer = "http://www.baidu.com/referer.php";
            //获取Post数据流
            Stream newStream = PostRequest.GetRequestStream();
            StreamWriter myStreamWriter = new StreamWriter(newStream, Encoding.Default);
            //把数据写入HttpWebRequest的Request流  
            newStream.Write(data,0,data.Length);
            //关闭打开对象     
            myStreamWriter.Close();
            newStream.Close();
            //新建一个HttpWebResponse 
            HttpWebResponse PostResponse = (HttpWebResponse)PostRequest.GetResponse();
}
        public CookieContainer cc;

        private void button1_Click(object sender, EventArgs e)//投票 按钮
        {
            Vote("http:///www.baidu.com/Main.php", "http://www.baidu.com/Vote.php", "id=1309");
        }
           
    }
}

Answer 1

验证账户请直接在此处跟帖：

http://social.msdn.microsoft.com/Forums/en-US/2040f706-fd63-4929-bfb8-4c96b4666a75/verify-your-account-7?forum=reportabug

至于您的问题，您的GetCookie和BackGroundworker是什么关系呢？另外你的GetCookie貌似直接在Button3的Click事件中，可能导致UI卡顿。建议你写入一个线程或者利用BackGroundworker来完成。

---

For Account Validation, please follow "Verify Account+Number" at http://social.msdn.microsoft.com/Forums/en-us/home?forum=reportabug

For ASP.NET Question, please ask at http://forums.asp.net

For other questions, you can ask at http://stackexchange.com/sites

Click and Donate at http://www.freerice.com

Answer 2

可否帮我改一下呢，我不会改

Answer 3

（1）获取cookie与post接收数据不是同一个页面，需要先访问页面A，客户端产生cookie后（get方式），才能对页面B post数据，若直接进入页面B，因该页面不产生cookie，无法post。

（2）如何实现不断地通过页面A获取cookie-带该cookie post数据到页面B-清除cookie，对于这种获取cookie和post数据页面不相同的，不知道该怎么处理！

Answer 4

您必须处理BackGroundworker的RunWorkerComplete事件，然后：

 public partial class Form1 : Form
    {
        private CookieContainer cc = null;

        privatevoid GetSession(string url)//取cookie
        {
            cc = new CookieContainer();
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.CookieContainer = cc;
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            cc.Add(response.Cookies);
        }
        public Form1()
        {
            InitializeComponent();
        }
 
        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            string postData = "pic_id=xxxx";
            UTF8Encoding encoding = new UTF8Encoding();
            byte[] data = encoding.GetBytes(postData);
            HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create("url post header");
            myRequest.Method = "POST";
            myRequest.ContentType = "application/x-www-form-urlencoded";
            myRequest.ContentLength = data.Length;
            myRequest.Referer = "url referer";
            myRequest.CookieContainer = cc;
            Stream newStream = myRequest.GetRequestStream();
            newStream.Write(data, 0, data.Length);
            newStream.Close();
            HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
            GetSession("url");
        }
       
        private void backgroundWorker1_RunWorkerCompleted(
    object sender, RunWorkerCompletedEventArgs e)
{
          System.Net.Cookie cookie = cc.GetCookies(new Uri("url"))["guid"];
            this.textBox1.Text = cookie.Value;
}
        
        private void button2_Click(object sender, EventArgs e)//投票 按钮
        {
            backgroundWorker1.RunWorkerAsync();
        }
    }

---

For Account Validation, please follow "Verify Account+Number" at http://social.msdn.microsoft.com/Forums/en-us/home?forum=reportabug

For ASP.NET Question, please ask at http://forums.asp.net

For other questions, you can ask at http://stackexchange.com/sites

Click and Donate at http://www.freerice.com

Answer 5

我努力尝试了，但因初学不久，上面的，直接用下面的方法可以吗？我改成下面这样了，再帮我改一下吧谢谢啦，忘了说，这个例子很特殊（一般都情况下访问页面访问会产生cookie，带着cookie post就完了）：这个需要先通过访问MainUrl在客户端留下cookie，然后在VoteUrl投票需要带上这个cookie才能完成投票，若客户端直接访问VoteUrl，不产生cookie，就无法完成投票。需要实现的是，通过按钮每次获取新的cookie进行投票。

我不知道那些地方该该注释掉，哪些地方该改？再次感谢版主！

using System;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;

namespace AutoVote
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
        }

        public void Post(string MainUrl, string VoteUrl,string PostData)
        {
            HttpWebRequest req = (HttpWebRequest)WebRequest.Create(MainUrl);
            CookieContainer c = new CookieContainer();
            req.CookieContainer = c;
            req.GetResponse();
            
            UTF8Encoding encoding = new UTF8Encoding();
            byte[] data = encoding.GetBytes(PostData);
            HttpWebRequest PostRequest = (HttpWebRequest)WebRequest.Create(VoteUrl);
            PostRequest.Method = "POST";
            PostRequest.ContentType = "application/x-www-form-urlencoded";
            PostRequest.ContentLength = PostData.Length;
            //PostRequest.CookieContainer = cc;
            PostRequest.Referer = "UrlReferer";
            Stream newStream = PostRequest.GetRequestStream();
            StreamWriter myStreamWriter = new StreamWriter(newStream, Encoding.Default);
            newStream.Write(data,0,data.Length);
            myStreamWriter.Close();
            newStream.Close();
            HttpWebResponse PostResponse = (HttpWebResponse)PostRequest.GetResponse();
            //StreamReader reader = new StreamReader(PostResponse.GetResponseStream(), Encoding.Default);
            //string content = reader.ReadToEnd();
}
        //public CookieContainer c;

        private void button1_Click(object sender, EventArgs e)//投票 按钮
        {
Post("http://www.baidu.com/main.php", "http://www.baidu.com/vote.php", "id=211");
        }
           
    }
}

Answer 6

你好：

我上面的方法其实你只要一个按钮就可以完成投票啥的了，你耐心等到TextBox出来结果之后继续点击，应该可以重复此过程的。不然获取Cookie可能造成顿卡。

---

For Account Validation, please follow "Verify Account+Number" at http://social.msdn.microsoft.com/Forums/en-us/home?forum=reportabug

For ASP.NET Question, please ask at http://forums.asp.net

For other questions, you can find a specific forum and then ask at http://stackexchange.com/sites

Click and Donate at http://www.freerice.com