HttpWebRequest 获取验证码进行识别，老是提示错误，验证码已经识别成功了

Question

HttpWebRequest 获取验证码进行识别，老是提示错误，验证码已经识别成功了, 可能是cookie的问题，求高手解答，本人愿意出500元RMB，跪求高手出现！qq476420016

Answer 1

你用HttpRequest获取验证码时，相当于点击了“重新获取验证码”，当然和本来的验证码不一样了。
你每请求一次验证码的地址，服务器都会重新生成一次。
500RMB, 请打给我的账号: 6222-12345678

Answer 2

no code you say a jb

Answer 3

void Post(string url, string indata, string strCookie)
        {            string outdata = "";            CookieContainer myCookieContainer = new CookieContainer();
            //新建一个CookieContainer来存放Cookie集合             //打开页面
            HttpWebRequest myHttpWebRequest1 = (HttpWebRequest)WebRequest.Create("http://www.7daysinn.cn/login.php");
            //新建一个HttpWebRequest 
            myHttpWebRequest1.ContentType = "application/x-www-form-urlencoded";
            myHttpWebRequest1.ContentLength = indata.Length;
            //myHttpWebRequest1.Method = "";
            myHttpWebRequest1.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; Q312461; .NET CLR 1.0.3705)";
            myHttpWebRequest1.CookieContainer = myCookieContainer;            HttpWebResponse response1 = myHttpWebRequest1.GetResponse() as HttpWebResponse;
            response1.Cookies = myHttpWebRequest1.CookieContainer.GetCookies(myHttpWebRequest1.RequestUri);
            Print_Cookie(response1);
            //打开页面
            string url_sc = "http://www.7daysinn.cn/safecode.php";
            HttpWebRequest myHttpWebRequest2 = (HttpWebRequest)WebRequest.Create(url_sc);
            //新建一个HttpWebRequest 
            myHttpWebRequest2.ContentType = "application/x-www-form-urlencoded";
            myHttpWebRequest2.ContentLength = indata.Length;
            myHttpWebRequest2.Method = "GET";
            myHttpWebRequest2.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; Q312461; .NET CLR 1.0.3705)";
            myHttpWebRequest2.CookieContainer = new CookieContainer();
            myHttpWebRequest2.CookieContainer.Add(response1.Cookies);            HttpWebResponse response2 = myHttpWebRequest2.GetResponse() as HttpWebResponse;
            response2.Cookies = myHttpWebRequest2.CookieContainer.GetCookies(myHttpWebRequest2.RequestUri);            Print_Cookie(response2);            System.Drawing.Image simg = System.Drawing.Image.FromStream(response2.GetResponseStream());
            simg.Save("temp1.bmp");
            Bitmap newimg = new Bitmap(simg);
            pictureBox1.Image = simg;            //以下使用GetVcodeFromBuffer接口
            StringBuilder Result = new StringBuilder('\0', 256); 
            string ImgPath = System.Environment.CurrentDirectory + "\\temp1.bmp";
            FileStream fsMyfile = File.OpenRead(ImgPath);
            int FileLen = (int)fsMyfile.Length;
            byte[] Buffer = new byte[FileLen];
            fsMyfile.Read(Buffer, 0, FileLen);
            fsMyfile.Close();            if (GetVcodeFromBuffer(index, Buffer, FileLen, Result))
                indata += Result.ToString();
            HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
            //新建一个HttpWebRequest 
            myHttpWebRequest.ContentType = "application/x-www-form-urlencoded";
            myHttpWebRequest.ContentLength = indata.Length;
            myHttpWebRequest.Method = "POST";
            myHttpWebRequest.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; Q312461; .NET CLR 1.0.3705)";
            myHttpWebRequest.CookieContainer = new CookieContainer();
            myHttpWebRequest.CookieContainer.Add(response2.Cookies);
            //设置HttpWebRequest的CookieContainer为刚才建立的那个myCookieContainer             Stream myRequestStream = myHttpWebRequest.GetRequestStream();
            StreamWriter myStreamWriter = new StreamWriter(myRequestStream, Encoding.GetEncoding("gb2312"));
            myStreamWriter.Write(indata, 0, indata.Length);
            //把数据写入HttpWebRequest的Request流 
            myStreamWriter.Close();
            myRequestStream.Close();
            //关闭打开对象             HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse();
            //新建一个HttpWebResponse  
             myHttpWebResponse.Cookies = myCookieContainer.GetCookies(myHttpWebRequest.RequestUri);
             //获取一个包含url的Cookie集合的CookieCollection              Print_Cookie(myHttpWebResponse);            Stream myResponseStream = myHttpWebResponse.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
            outdata = myStreamReader.ReadToEnd();
            //把数据从HttpWebResponse的Response流中读出 
            myStreamReader.Close();
            myResponseStream.Close();
            Console.WriteLine(outdata);

Answer 4

先访问登录页面，然后再获取验证码，然后再提交登录数据。用的都是一个cookie，但是还是提示验证码错误，求高手解答！

Answer 5

我把每次的cookie输出来了，大家看一下
第一次访问登录页面的cookie
Cookie:
PHPSESSID = d9f12f43b6e9507ddbdf7c8357631bd7
Domain: www.7daysinn.cn
Path: /
Port: 
Secure: False
When issued: 2012-6-7 9:15:00
Expires: 0001-1-1 0:00:00 (expired? False)
Don't save: False
Comment: 
Uri for comments: 
Version: RFC 2965
String: PHPSESSID=d9f12f43b6e9507ddbdf7c8357631bd7第二次获取验证码的cookie，貌似有3个，不知道为什么
Cookie:
www_safecode = 8C5DCEA2BE52B471EFD629A6216610B1
Domain: www.7daysinn.cn
Path: /safecode.php
Port: 
Secure: False
When issued: 2012-6-7 9:15:04
Expires: 0001-1-1 0:00:00 (expired? False)
Don't save: False
Comment: 
Uri for comments: 
Version: RFC 2965
String: www_safecode=8C5DCEA2BE52B471EFD629A6216610B1
Cookie:
vcode_ct = 1339031798
Domain: www.7daysinn.cn
Path: /safecode.php
Port: 
Secure: False
When issued: 2012-6-7 9:15:04
Expires: 0001-1-1 0:00:00 (expired? False)
Don't save: False
Comment: 
Uri for comments: 
Version: RFC 2965
String: vcode_ct=1339031798
Cookie:
PHPSESSID = d9f12f43b6e9507ddbdf7c8357631bd7
Domain: www.7daysinn.cn
Path: /
Port: 
Secure: False
When issued: 2012-6-7 9:15:04
Expires: 0001-1-1 0:00:00 (expired? False)
Don't save: False
Comment: 
Uri for comments: 
Version: RFC 2965
String: PHPSESSID=d9f12f43b6e9507ddbdf7c8357631bd7第三次，提交登录数据的时候的cookie
Cookie:
PHPSESSID = d9f12f43b6e9507ddbdf7c8357631bd7
Domain: www.7daysinn.cn
Path: /
Port: 
Secure: False
When issued: 2012-6-7 9:15:00
Expires: 0001-1-1 0:00:00 (expired? False)
Don't save: False
Comment: 
Uri for comments: 
Version: RFC 2965
String: PHPSESSID=d9f12f43b6e9507ddbdf7c8357631bd7
输出cookie的代码是void Print_Cookie(HttpWebResponse response)
        {
            foreach (Cookie cook in response.Cookies)
            {
                Console.WriteLine("Cookie:");
                Console.WriteLine("{0} = {1}", cook.Name, cook.Value);
                Console.WriteLine("Domain: {0}", cook.Domain);
                Console.WriteLine("Path: {0}", cook.Path);
                Console.WriteLine("Port: {0}", cook.Port);
                Console.WriteLine("Secure: {0}", cook.Secure);                Console.WriteLine("When issued: {0}", cook.TimeStamp);
                Console.WriteLine("Expires: {0} (expired? {1})",
                    cook.Expires, cook.Expired);
                Console.WriteLine("Don't save: {0}", cook.Discard);
                Console.WriteLine("Comment: {0}", cook.Comment);
                Console.WriteLine("Uri for comments: {0}", cook.CommentUri);
                Console.WriteLine("Version: RFC {0}", cook.Version == 1 ? "2109" : "2965");                // Show the string representation of the cookie.
                Console.WriteLine("String: {0}", cook.ToString());
            }        }