登錄 CSDN

此處用 WinForm 模擬登錄 CSDN

 

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Net; using System.IO; using System.IO.Compression; using System.Web; namespace loginCSDN { public partial class Form1 : Form { CookieContainer cc = new CookieContainer(); string viewState; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { // 讀取登錄頁面，獲取 VIEWSTATE 及 Cookies byte[] bs = getBytes("http://passport.csdn.net/UserLogin.aspx", cc, null); string html = Encoding.UTF8.GetString(bs); viewState = "id=/"__VIEWSTATE/" value=/""; // viewState 的開始字符串 int begin = html.IndexOf(viewState) + viewState.Length; int end = html.IndexOf("/"", begin); viewState = html.Substring(begin, end - begin); // 獲取 viewState // 讀取圖片校驗碼並顯示圖片 bs = getBytes("http://passport.csdn.net/ShowExPwd.aspx?temp=ga1166l0", cc, null); MemoryStream ms = new MemoryStream(bs); Bitmap bmp = new Bitmap(ms); pictureBox1.Image = bmp; // 顯示圖片驗證碼 ms.Close(); } // 更新圖片驗證碼 private void pictureBox1_DoubleClick(object sender, EventArgs e) { byte[] bs = getBytes("http://passport.csdn.net/ShowExPwd.aspx?temp=ga1166l0", cc, null); MemoryStream ms = new MemoryStream(bs); Bitmap bmp = new Bitmap(ms); pictureBox1.Image = bmp; // 更新圖片驗證碼(可能看不清楚) ms.Close(); } // 顯示 Cookies 信息 private void button3_Click(object sender, EventArgs e) { StringBuilder sb = new StringBuilder(); CookieCollection cCollection = cc.GetCookies(new Uri("http://passport.csdn.net/UserLogin.aspx")); foreach (Cookie c in cCollection) { sb.AppendLine(c.Name.PadLeft(20) + " --> " + c.Value); } richTextBox1.Text = sb.ToString(); label1.Text = richTextBox1.Text.Length.ToString() + " Bytes"; } // 用戶登錄 private void btnLogin_Click(object sender, EventArgs e) { try { string userName = txtUser.Text; // 獲取用戶名 string userPwd = txtPassword.Text; // 獲取口令 string Verify = txtVerify.Text; // 獲取驗證碼 string postData = "__VIEWSTATE=" + HttpUtility.UrlEncode(viewState) + "&ctl00$CPH_Content$tb_LoginNameOrLoginEmail=" + userName + "&ctl00$CPH_Content$tb_Password=" + userPwd + "&ctl00$CPH_Content$tb_ExPwd=" + Verify + "&ctl00$CPH_Content$Image_Login.x=16&ctl00$CPH_Content$Image_Login.y=17"; //&from=http://hi.csdn.net/&PrePage=&MailParameters="; byte[] buffer = Encoding.Default.GetBytes(postData); // 要發送的數據 buffer = getBytes("http://passport.csdn.net/UserLogin.aspx", cc, buffer); string html = Encoding.UTF8.GetString(buffer); // 獲取返回的頁面內容 if (html.IndexOf("您好，您已經成功登錄。") > 0) { MessageBox.Show("你已成功登錄 CSDN"); } else { MessageBox.Show("登錄 CSDN 失敗！"); } } catch (Exception Err) { MessageBox.Show(Err.Message); } } // 讀取網絡資源，返回字節數組 private static byte[] getBytes(string url, CookieContainer cookie, byte[] postData) { int c = url.IndexOf("/", 10); byte[] data = null; HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.CookieContainer = cookie; request.Referer = (c > 0 ? url.Substring(0, c) : url); request.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)"; request.Headers[HttpRequestHeader.AcceptEncoding] = "gzip, deflate"; if (postData != null) // 需要 Post 數據 { request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; request.ContentLength = postData.Length; Stream requestStream = request.GetRequestStream(); requestStream.Write(postData, 0, postData.Length); requestStream.Close(); } HttpWebResponse response = (HttpWebResponse)request.GetResponse(); string ce = response.Headers[HttpResponseHeader.ContentEncoding]; int ContentLength = (int)response.ContentLength; Stream s = response.GetResponseStream(); c = 1024 * 10; if (ContentLength < 0) // 不能獲取數據的長度 { data = new byte[c]; MemoryStream ms = new MemoryStream(); int l = s.Read(data, 0, c); while (l > 0) { ms.Write(data, 0, l); l = s.Read(data, 0, c); } data = ms.ToArray(); ms.Close(); } else // 數據長度已知 { data = new byte[ContentLength]; int pos = 0; while (ContentLength > 0) { int l = s.Read(data, pos, ContentLength); pos += l; ContentLength -= l; } } s.Close(); response.Close(); if (ce == "gzip") // 若數據是壓縮格式，則要進行解壓 { MemoryStream js = new MemoryStream(); // 解壓後的流 MemoryStream ms = new MemoryStream(data); // 用於解壓的流 GZipStream g = new GZipStream(ms, CompressionMode.Decompress); byte[] buffer = new byte[c]; // 讀數據緩衝區 int l = g.Read(buffer, 0, c); // 一次讀 10K while (l > 0) { js.Write(buffer, 0, l); l = g.Read(buffer, 0, c); } g.Close(); ms.Close(); data = js.ToArray(); js.Close(); } return data; // 返回字節數組 } } }

 

 

查看登錄頁面源碼，可看到驗證碼的地址爲：

src="ShowExPwd.aspx?temp=' + (new Date().getTime().toString(36))

 

這是一個和客戶端的時間相關的一個temp參數值。經測試，實際登錄和該值無關。

現在的登錄簡單多了，主要代碼如下：2013年6月6日更新

        private void btnLogin_Click(object sender, EventArgs e)
        {
            string userName = txtUser.Text;                        // 獲取用戶名  
            string userPwd = txtPwd.Text;                          // 獲取口令  
            string postData = "u=" + userName + "&p=" + userPwd + "&remember=1&t=log";  //&from=http://hi.csdn.net/&PrePage=&MailParameters=";  
            byte[] buffer = Encoding.Default.GetBytes(postData);   // 要發送的數據  
            buffer = getBytes("https://passport.csdn.net/ajax/accounthandler.ashx", cc, buffer);
            string html = Encoding.UTF8.GetString(buffer);         // 獲取返回的頁面內容  

            if (html.IndexOf("\"status\":true,") > 0)
            {
                MessageBox.Show("你已成功登錄 CSDN");
            }
            else
            {
                MessageBox.Show("登錄 CSDN 失敗！");
            }  
        }