using System;
using System.IO;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.Collections;
using System.Collections.Specialized  ;
namespace devApp.Mail
{
    class smtpClass
    {

 /// <summary>
 /// 郵件內容
 /// </summary>
 public class MailMessage
 {
  private string sender=null;
     private System.Collections.Specialized.StringDictionary receivers = new System.Collections.Specialized.StringDictionary();
  private string subject="";
  private string xMailer="";
     private System.Collections.Specialized.StringDictionary attachments = new System.Collections.Specialized.StringDictionary();
  private MailEncodings mailEncoding=MailEncodings.GB2312;
  private MailTypes mailType=MailTypes.Html;
  private byte[] mailBody=null;
  /// <summary>
  /// 獲取或設置發件人
  /// </summary>
  public string Sender
  {
   get{return this.sender;}
   set{this.sender=value;}
  }
  /// <summary>
  /// 獲取收件人地址集合
  /// </summary>
     public System.Collections.Specialized.StringDictionary Receivers
  {
   get{return this.receivers;}
  }
  /// <summary>
  /// 獲取或設置郵件主題
  /// </summary>
  public string Subject
  {
   get{return this.subject;}
   set{this.subject=value;}
  }
  /// <summary>
  /// 獲取或設置郵件傳送者
  /// </summary>
  public string XMailer
  {
   get{return this.xMailer;}
   set{this.xMailer=value;}
  }
  /// <summary>
  /// 獲取附件列表
  /// </summary>
     public System.Collections.Specialized.StringDictionary Attachments
  {
   get{return this.attachments;}
  }
  /// <summary>
  /// 獲取或設置郵件的編碼方式
  /// </summary>
  public MailEncodings MailEncoding
  {
   get{return this.mailEncoding;}
   set{this.mailEncoding=value;}
  }
  /// <summary>
  /// 獲取或設置郵件格式
  /// </summary>
  public MailTypes MailType
  {
   get{return this.mailType;}
   set{this.mailType=value;}
  }
  /// <summary>
  /// 獲取或設置郵件正文
  /// </summary>
  public byte[] MailBody
  {
   get{return this.mailBody;}
   set{this.mailBody=value;}
  }
 }
 /// <summary>
 /// 郵件編碼
 /// </summary>
 public enum MailEncodings
 {
  GB2312,
  ASCII,
  Unicode,
  UTF8
 }
 /// <summary>
 /// 郵件格式
 /// </summary>
 public enum MailTypes
 {
  Html,
  Text
 }
 /// <summary>
 /// smtp服務器的驗證方式
 /// </summary>
 public enum SmtpValidateTypes
 {
  /// <summary>
  /// 不需要驗證
  /// </summary>
  None,
  /// <summary>
  /// 通用的auth login驗證
  /// </summary>
  Login,
  /// <summary>
  /// 通用的auth plain驗證
  /// </summary>
  Plain,
  /// <summary>
  /// CRAM-MD5驗證
  /// </summary>
  CRAMMD5
 }
 /// <summary>
 /// 郵件發送類
 /// </summary>
 public class KSN_Smtp
 {
  #region "member fields"
  /// <summary>
  /// 連接對象
  /// </summary>
  private TcpClient tc;
  /// <summary>
  /// 網絡流
  /// </summary>
  private NetworkStream ns;
  /// <summary>
  /// 錯誤的代碼字典
  /// </summary>
  private StringDictionary errorCodes=new StringDictionary();
  /// <summary>
  /// 操作執行成功后的響應代碼字典
  /// </summary>
  private StringDictionary rightCodes=new StringDictionary();
  /// <summary>
  /// 執行過程中錯誤的消息
  /// </summary>
  private string errorMessage="";
  /// <summary>
  /// 記錄操作日志
  /// </summary>
  private string logs="";
  /// <summary>
  /// 主機登陸的驗證方式
  /// </summary>
     private System.Collections.Specialized.StringDictionary validateTypes = new System.Collections.Specialized.StringDictionary();
  /// <summary>
  /// 換行常數
  /// </summary>
  private const string CRLF="\\r\\n";
  private string serverName="smtp";
  private string logPath=null;
  private string userid=null;
  private string password=null;
  private string mailEncodingName="GB2312";
  private bool sendIsComplete=false;
  private SmtpValidateTypes smtpValidateType=SmtpValidateTypes.Login;
  #endregion
  #region "propertys"
  /// <summary>
  /// 獲取最后一此程序執行中的錯誤消息
  /// </summary>
  public string ErrorMessage
  {
   get{return this.errorMessage;}
  }
  /// <summary>
  /// 獲取或設置日志輸出路徑
  /// </summary>
  public string LogPath
  {
   get
   {
    return this.logPath;
   }
   set{this.logPath=value;}
  }
  /// <summary>
  /// 獲取或設置登陸smtp服務器的帳號
  /// </summary>
  public string UserID
  {
   get{return this.userid;}
   set{this.userid=value;}
  }
  /// <summary>
  /// 獲取或設置登陸smtp服務器的密碼
  /// </summary>
  public string Password
  {
   get{return this.password;}
   set{this.password=value;}
  }
  /// <summary>
  /// 獲取或設置要使用登陸Smtp服務器的驗證方式
  /// </summary>
  public SmtpValidateTypes SmtpValidateType
  {
   get{return this.smtpValidateType;}
   set{this.smtpValidateType=value;}
  }
  #endregion
  #region "construct functions"
  /// <summary>
  /// 構造函數
  /// </summary>
  /// <param name="server">主機名</param>
  /// <param name="port">端口</param>
  public  KSN_Smtp(string server,int port)
  {
   tc=new TcpClient(server,port);
   ns=tc.GetStream();
   this.serverName=server;
   this.initialFields();
  }
  /// <summary>
  /// 構造函數
  /// </summary>
  /// <param name="ip">主機ip</param>
  /// <param name="port">端口</param>
  public KSN_Smtp(IPAddress ip,int port)
  {
   IPEndPoint endPoint=new IPEndPoint(ip,port);
   tc=new TcpClient(endPoint);
   ns=tc.GetStream();
   this.serverName=ip.ToString();
   this.initialFields();
  }
  #endregion
  #region "methods"
  private void initialFields() //初始化連接
  {
   logs="================"+DateTime.Now.ToLongDateString()+"    "+DateTime.Now.ToLongTimeString()+"==============="+CRLF;
   //*****************************************************************
   //錯誤的狀態碼
   //*****************************************************************
   errorCodes.Add("421","服務未就緒,關閉傳輸通道");
   errorCodes.Add("432","需要一個密碼轉換");
   errorCodes.Add("450","要求的郵件操作未完成,郵箱不可用(如:郵箱忙)");
   errorCodes.Add("451","放棄要求的操作,要求的操作未執行");
   errorCodes.Add("452","系統存儲不足,要求的操作未完成");
   errorCodes.Add("454","臨時的認證失敗");
   errorCodes.Add("500","郵箱地址錯誤");
   errorCodes.Add("501","參數格式錯誤");
   errorCodes.Add("502","命令不可實現");
   errorCodes.Add("503","命令的次序不正確");
   errorCodes.Add("504","命令參數不可實現");
   errorCodes.Add("530","需要認證");
   errorCodes.Add("534","認證機制過于簡單");
   errorCodes.Add("538","當前請求的認證機制需要加密");
   errorCodes.Add("550","當前的郵件操作未完成,郵箱不可用(如：郵箱未找到或郵箱不能用)");
   errorCodes.Add("551","用戶非本地,請嘗試<forward-path>");
   errorCodes.Add("552","過量的存儲分配,制定的操作未完成");
   errorCodes.Add("553","郵箱名不可用,如:郵箱地址的格式錯誤");
   errorCodes.Add("554","傳送失敗");
   errorCodes.Add("535","用戶身份驗證失敗");
   //****************************************************************
   //操作執行成功后的狀態碼
   //****************************************************************
   rightCodes.Add("220","服務就緒");
   rightCodes.Add("221","服務關閉傳輸通道");
   rightCodes.Add("235","驗證成功");
   rightCodes.Add("250","要求的郵件操作完成");
   rightCodes.Add("251","非本地用戶,將轉發向<forward-path>");
   rightCodes.Add("334","服務器響應驗證Base64字符串");
   rightCodes.Add("354","開始郵件輸入,以<CRLF>.<CRLF>結束");
   //讀取系統回應
   StreamReader reader=new StreamReader(ns);
   logs+=reader.ReadLine()+CRLF;
  }
  /// <summary>
  /// 向SMTP發送命令
  /// </summary>
  /// <param name="cmd"></param>
  private string sendCommand(string cmd,bool isMailData)
  {
   if(cmd!=null && cmd.Trim()!=string.Empty)
   {
    byte[] cmd_b=null;
    if(!isMailData)//不是郵件數據
     cmd+=CRLF;
    logs+=cmd;
    //開始寫入郵件數據
    if(!isMailData)
    {
     cmd_b=Encoding.ASCII.GetBytes(cmd);
     ns.Write(cmd_b,0,cmd_b.Length);
    }
    else
    {
     cmd_b=Encoding.GetEncoding(this.mailEncodingName).GetBytes(cmd);
     ns.BeginWrite(cmd_b,0,cmd_b.Length,new AsyncCallback(this.asyncCallBack),null);
    }
    //讀取服務器響應
    StreamReader reader=new StreamReader(ns);
    string response=reader.ReadLine();
    logs+=response+CRLF;