C#实现12306自动登录的方法

依然使用IE9的捕获参数，做了一个12306的登录功能。参照了网上童鞋们的做法。
其他都和前面几篇读取余票、票价一样，不过登录要用到证书的问题，这个参考了一个网上的例子。
不过12306会随时变化，下面的登录不一定一直都能成功。如果12306有变化，大家可以根据变化对代码做修改。总之使用的方法不变，就是捕获参数和url，然后自己补充参数。
效果如下：

项目名称：Test12306AutoLogin；
环境：.net 4.0，Visual studio 2010；
项目图：

核心代码如下，
信任证书代码：

 public class Messenger
  {
    public Messenger()
    {
    }

    public void Register(string message, Action callback)
    {
      this.Register(message, callback, null);
    }

    public void Register<T>(string message, Action<T> callback)
    {
      this.Register(message, callback, typeof(T));
    }

    void Register(string message, Delegate callback, Type parameterType)
    {
      if (String.IsNullOrEmpty(message))
        throw new ArgumentException("'message' cannot be null or empty.");

      if (callback == null)
        throw new ArgumentNullException("callback");

      this.VerifyParameterType(message, parameterType);

      _messageToActionsMap.AddAction(message, callback.Target, callback.Method, parameterType);
    }

    [Conditional("DEBUG")]
    void VerifyParameterType(string message, Type parameterType)
    {
      Type previouslyRegisteredParameterType = null;
      if (_messageToActionsMap.TryGetParameterType(message, out previouslyRegisteredParameterType))
      {
        if (previouslyRegisteredParameterType != null && parameterType != null)
        {
          if (!previouslyRegisteredParameterType.Equals(parameterType))
            throw new InvalidOperationException(string.Format(
              "The registered action's parameter type is inconsistent with the previously registered actions for message '{0}'.\nExpected: {1}\nAdding: {2}",
              message,
              previouslyRegisteredParameterType.FullName,
              parameterType.FullName));
        }
        else
        {
          // One, or both, of previouslyRegisteredParameterType or callbackParameterType are null.
          if (previouslyRegisteredParameterType != parameterType)  // not both null?
          {
            throw new TargetParameterCountException(string.Format(
              "The registered action has a number of parameters inconsistent with the previously registered actions for message \"{0}\".\nExpected: {1}\nAdding: {2}",
              message,
              previouslyRegisteredParameterType == null ? 0 : 1,
              parameterType == null ? 0 : 1));
          }
        }
      }
    }

    public void NotifyColleagues(string message, object parameter)
    {
      if (String.IsNullOrEmpty(message))
        throw new ArgumentException("'message' cannot be null or empty.");

      Type registeredParameterType;
      if (_messageToActionsMap.TryGetParameterType(message, out registeredParameterType))
      {
        if (registeredParameterType == null)
          throw new TargetParameterCountException(string.Format("Cannot pass a parameter with message '{0}'. Registered action(s) expect no parameter.", message));
      }

      var actions = _messageToActionsMap.GetActions(message);
      if (actions != null)
        actions.ForEach(action => action.DynamicInvoke(parameter));
    }

    public void NotifyColleagues(string message)
    {
      if (String.IsNullOrEmpty(message))
        throw new ArgumentException("'message' cannot be null or empty.");

      Type registeredParameterType;
      if (_messageToActionsMap.TryGetParameterType(message, out registeredParameterType))
      {
        if (registeredParameterType != null)
          throw new TargetParameterCountException(string.Format("Must pass a parameter of type {0} with this message. Registered action(s) expect it.", registeredParameterType.FullName));
      }

      var actions = _messageToActionsMap.GetActions(message);
      if (actions != null)
        actions.ForEach(action => action.DynamicInvoke());
    }

    private class MessageToActionsMap
    {
      internal MessageToActionsMap()
      {
      }

      internal void AddAction(string message, object target, MethodInfo method, Type actionType)
      {
        if (message == null)
          throw new ArgumentNullException("message");

        if (method == null)
          throw new ArgumentNullException("method");

        lock (_map)
        {
          if (!_map.ContainsKey(message))
            _map[message] = new List<WeakAction>();

          _map[message].Add(new WeakAction(target, method, actionType));
        }
      }

      internal List<Delegate> GetActions(string message)
      {
        if (message == null)
          throw new ArgumentNullException("message");

        List<Delegate> actions;
        lock (_map)
        {
          if (!_map.ContainsKey(message))
            return null;

          List<WeakAction> weakActions = _map[message];
          actions = new List<Delegate>(weakActions.Count);
          for (int i = weakActions.Count - 1; i > -1; --i)
          {
            WeakAction weakAction = weakActions[i];
            if (weakAction == null)
              continue;

            Delegate action = weakAction.CreateAction();
            if (action != null)
            {
              actions.Add(action);
            }
            else
            {
              // The target object is dead, so get rid of the weak action.
              weakActions.Remove(weakAction);
            }
          }

          // Delete the list from the map if it is now empty.
          if (weakActions.Count == 0)
            _map.Remove(message);
        }

        // Reverse the list to ensure the callbacks are invoked in the order they were registered.
        actions.Reverse();

        return actions;
      }

      internal bool TryGetParameterType(string message, out Type parameterType)
      {
        if (message == null)
          throw new ArgumentNullException("message");

        parameterType = null;
        List<WeakAction> weakActions;
        lock (_map)
        {
          if (!_map.TryGetValue(message, out weakActions) || weakActions.Count == 0)
            return false;
        }
        parameterType = weakActions[0].ParameterType;
        return true;
      }

      readonly Dictionary<string, List<WeakAction>> _map = new Dictionary<string, List<WeakAction>>();
    }

    private class WeakAction
    {

      internal WeakAction(object target, MethodInfo method, Type parameterType)
      {
        if (target == null)
        {
          _targetRef = null;
        }
        else
        {
          _targetRef = new WeakReference(target);
        }

        _method = method;

        this.ParameterType = parameterType;

        if (parameterType == null)
        {
          _delegateType = typeof(Action);
        }
        else
        {
          _delegateType = typeof(Action<>).MakeGenericType(parameterType);
        }
      }

      internal Delegate CreateAction()
      {
        // Rehydrate into a real Action object, so that the method can be invoked.
        if (_targetRef == null)
        {
          return Delegate.CreateDelegate(_delegateType, _method);
        }
        else
        {
          try
          {
            object target = _targetRef.Target;
            if (target != null)
              return Delegate.CreateDelegate(_delegateType, target, _method);
          }
          catch
          {
          }
        }

        return null;
      }

      internal readonly Type ParameterType;
      readonly Type _delegateType;
      readonly MethodInfo _method;
      readonly WeakReference _targetRef;
    }

    readonly MessageToActionsMap _messageToActionsMap = new MessageToActionsMap();
  }

登录的所有方法类：

public class Login12306Manager
  {
    private static readonly Messenger s_messenger = new Messenger();

    public static Messenger SMessenger { get { return s_messenger; } }

    public const string APPEND_MESSAGE = "append_message";

    public static string afterLoginCookie;

    private static string beforLoginCookie;

    static Login12306Manager()
    {
      SetCertificatePolicy();
    }

    /// <summary>
    /// 登 录
    /// </summary>
    public static string Login(string userName,string password, string randomCode)
    {
      string resultHtml = string.Empty;

      try
      {
        string loginRand= DoGetLoginRand();

        HttpWebRequest request = (HttpWebRequest)WebRequest.Create
          (@"https://dynamic.12306.cn/otsweb/loginAction.do?method=login");

        request.Accept = @"text/html, application/xhtml+xml, */*";

        request.UserAgent = @"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)";

        request.Referer = @"https://dynamic.12306.cn/otsweb/loginAction.do?method=init";

        request.ContentType = @"application/x-www-form-urlencoded";

        request.Headers[HttpRequestHeader.Cookie] = beforLoginCookie;

        request.Method = "POST";

        byte[] buffer = new byte[0];
        string parameter =
@"loginRand={0}&refundLogin=N&refundFlag=Y&isClick=&form_tk=null&loginUser.user_name={1}&nameErrorFocus=&user.password={2}&passwordErrorFocus=&randCode={3}&randErrorFocus=&NDU0NzY4NA%3D%3D=Nzg4ZDAxMGNkYTZlMTRjZA%3D%3D&myversion=undefined";

        parameter = string.Format(parameter, loginRand, userName, password, randomCode);

        buffer = Encoding.UTF8.GetBytes(parameter);

        request.ContentLength = buffer.Length;
        using (Stream writer = request.GetRequestStream())
        {
          writer.Write(buffer, 0, buffer.Length);

          writer.Flush();
        }

        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
        {
          afterLoginCookie = response.GetResponseHeader("Set-cookie");

          using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
          {
            resultHtml = reader.ReadToEnd();

            resultHtml = ProcessLoginResult(resultHtml);
          }
        }
      }
      catch{ }

      return resultHtml;
    }

    /// <summary>
    /// 刷新验证码
    /// </summary>
    public static string RefreshCode()
    {
      string randImageUrl = string.Empty;

      try
      {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(string.Format(@"https://dynamic.12306.cn/otsweb/passCodeNewAction.do?module=login&rand=sjrand",

          new Random().Next(10000, 1000000)));

        request.Accept = @"image/png, image/svg+xml, image/*;q=0.8, */*;q=0.5";

        request.UserAgent = @"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)";

        request.Referer = @"https://dynamic.12306.cn/otsweb/loginAction.do?method=init";

        request.Method = "GET";

        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
        {
          beforLoginCookie = response.GetResponseHeader("Set-cookie");

          beforLoginCookie = Regex.Replace(beforLoginCookie, "path(?:[^,]+),?", "", RegexOptions.IgnoreCase);

          using (Stream reader = response.GetResponseStream())
          {
            string path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, new Random().Next(10000, 99999) + @"loginRandCode.JPEG");

            using (FileStream file = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write))
            {
              reader.CopyTo(file);
            }

            randImageUrl = path;
          }
        }
      }
      catch { }

      return randImageUrl;
    }

    private static string DoGetLoginRand()
    {
      string loginRand=string.Empty;

      try
      {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(@"https://dynamic.12306.cn/otsweb/loginAction.do?method=loginAysnSuggest");

        request.Accept = @"application/json, text/javascript, */*";

        request.UserAgent = @"Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)";

        request.Referer = @"https://dynamic.12306.cn/otsweb/loginAction.do?method=init";

        request.Headers[HttpRequestHeader.Cookie] = beforLoginCookie;

        request.Method = "POST";

        byte[] buffer = new byte[0];

        buffer = Encoding.UTF8.GetBytes(string.Empty);

        request.ContentLength = buffer.Length;

        using (Stream writer = request.GetRequestStream())
        {
          writer.Write(buffer, 0, buffer.Length);

          writer.Flush();
        }

        using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
        {
          using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
          {
            string result = reader.ReadToEnd();

            var loginRandContent = JsonConvert.DeserializeObject<BeforLoginRnad>(result);

            loginRand = loginRandContent.loginRand;
          }
        }
      }
      catch {}

      return loginRand;
    }
    /// <summary>
    /// 处理登录结果
    /// </summary>
    /// <param name="html">登录后返回的html文本</param>
    private static string ProcessLoginResult(string html)
    {
      string m_msgPattern = "message[^\"]+\"(?'message'[^\"]+)\";";

      string m_isLoginPatter = "isLogin\\s*=\\s*(?<val>.+)\n";

      string m_loginUserNamePattern = "u_name\\s*=\\s*['\"](?<name>.+)['\"]";

      if (html.Contains("请输入正确的验证码"))
      {
        return "验证码错误";
      }
      else if (html.Contains("当前访问用户过多"))
      {
        return "当前访问用户过多,请稍后再试...";
      }
      else
      {
        var match0 = Regex.Match(html, m_msgPattern, RegexOptions.Compiled);

        if (match0.Success)
        {
          string text = match0.Groups["message"].Value;

          if (text.Contains("密码") || text.Contains("登录名不存在"))
          {
            return "用户名或者密码错误";
          }
          else
          {
           return text;
          }
        }

        var match = Regex.Match(html, m_isLoginPatter, RegexOptions.Compiled);

        if (match.Success && (match.Groups["val"].Value.Trim().ToLower() == "true"))
        {
          match = Regex.Match(html, m_loginUserNamePattern, RegexOptions.Compiled);
          if (match.Success)
          {
            string name = match.Groups["name"].Value;

            return "登录成功:" + name;
          }
          else
          {
            return "登录失败,未知错误";
          }
        }
        else
        {
          return "登录失败!!!";
        }
      }
    }

    /// <summary>
    /// Sets the cert policy.
    /// </summary>
    private static void SetCertificatePolicy()
    {
      ServicePointManager.ServerCertificateValidationCallback
            += RemoteCertificateValidate;
    }

    /// <summary>
    /// Remotes the certificate validate.
    /// </summary>
    private static bool RemoteCertificateValidate(
      object sender, X509Certificate cert,
      X509Chain chain, SslPolicyErrors error)
    {
      SMessenger.NotifyColleagues(APPEND_MESSAGE, "信任任何证书...");
      return true;
    }
  }

  public class BeforLoginRnad
  {
    public string loginRand { get; set; }

    public string randError { get; set; }
  }

注意登录时，主要的正文是：

string parameter =
@"loginRand={0}&refundLogin=N&refundFlag=Y&isClick=&form_tk=null&loginUser.user_name={1}&nameErrorFocus=&user.password={2}&passwordErrorFocus=&randCode={3}&randErrorFocus=&NDU0NzY4NA%3D%3D=Nzg4ZDAxMGNkYTZlMTRjZA%3D%3D&myversion=undefined"，它有三个参数，登录时的随机码，用户名，密码和验证码组成。

调用如下：

前台wpf代码：

<Window x:Class="Test12306AutoLogin.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow">
  <StackPanel>
    <Grid>
      <Grid.Resources>
        <Style TargetType="TextBlock">
          <Setter Property="FontFamily" Value="Microsoft YaHei"/>
          <Setter Property="FontSize" Value="20"/>
          <Setter Property="VerticalAlignment" Value="Center"/>
        </Style>

        <Style TargetType="TextBox">
          <Setter Property="FontSize" Value="20"/>
          <Setter Property="MinWidth" Value="300"/>
          <Setter Property="Height" Value="50"/>
          <Setter Property="VerticalAlignment" Value="Center"/>
        </Style>

        <Style TargetType="PasswordBox">
          <Setter Property="FontSize" Value="20"/>
          <Setter Property="MinWidth" Value="300"/>
          <Setter Property="Height" Value="50"/>
          <Setter Property="VerticalAlignment" Value="Center"/>
        </Style>
      </Grid.Resources>
      <Grid.RowDefinitions>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
        <RowDefinition Height="auto"/>
      </Grid.RowDefinitions>

      <Grid.ColumnDefinitions>
        <ColumnDefinition Width="auto"/>
        <ColumnDefinition Width="auto"/>
      </Grid.ColumnDefinitions>

      <TextBlock Grid.Row="0" Grid.Column="0" Text="用户名："/>
      <TextBox Grid.Row="0" Grid.Column="1" x:Name="txtUserName"/>

      <TextBlock Grid.Row="1" Grid.Column="0" Text="密 码："/>
      <PasswordBox Grid.Row="1" Grid.Column="1" x:Name="txtPassword"/>

      <TextBlock Grid.Row="3" Grid.Column="0" Text="验证码"/>
      <StackPanel Grid.Row="3" Grid.Column="1" Orientation="Horizontal"
            VerticalAlignment="Center">
        <TextBox x:Name="txtRandCode" Width="150"/>
        <Image x:Name="imageRandCode" Width="70"/>
        <Button Content="刷新验证码" Height="30" Width="80" Click="ButtonRefreshRandCode_Click" />
      </StackPanel>
    </Grid>

    <Button Content="登 录" Width="150" Height="50" Click="ButtonLogin_Click" />

    <RichTextBox x:Name="rtxResultContent" MinHeight="200"/>

  </StackPanel>
</Window>

后台代码：

public partial class MainWindow : Window
  {
    public MainWindow()
    {
      InitializeComponent();

      this.Loaded += new RoutedEventHandler(MainWindow_Loaded);
    }

    void MainWindow_Loaded(object sender, RoutedEventArgs e)
    {
      DoRefreshRandCode();
    }

    private void DoRefreshRandCode()
    {
      string imageRandUrl = Login12306Manager.RefreshCode();

      if (File.Exists(imageRandUrl))
      {
        ImageSource src = (ImageSource)(new ImageSourceConverter().ConvertFromString(imageRandUrl));

        this.imageRandCode.Source = src;
      }

      this.txtRandCode.Text = string.Empty;
    }

    /// <summary>
    /// 登录
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void ButtonLogin_Click(object sender, RoutedEventArgs e)
    {
      string userName = this.txtUserName.Text;

      string password = this.txtPassword.Password;

      string randCode = this.txtRandCode.Text;

      if (string.IsNullOrEmpty(userName) || string.IsNullOrEmpty(password) || string.IsNullOrEmpty(randCode))
      {
        MessageBox.Show("请填写完整信息");

        return;
      }

      string html = Login12306Manager.Login(userName, password, randCode);

      System.Windows.Documents.FlowDocument doc = this.rtxResultContent.Document;

      doc.Blocks.Clear();

      this.rtxResultContent.AppendText(html);
    }

    /// <summary>
    /// 刷新验证码
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void ButtonRefreshRandCode_Click(object sender, RoutedEventArgs e)
    {
      DoRefreshRandCode();
    }
  }

以上就是本文的全部内容，希望对大家的学习有所帮助。