server.cs

email 发送 asp.net 2.0开发

using System;
using System.Text;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Collections;

namespace HBJ.MailSender.SMTP {

	public enum MailFormat{Text,HTML};
	public enum MailPriority{Low=1,Normal=3,High=5};

	#region Class mailAttachments
	public class MailAttachments {
		private const int MaxAttachmentNum=10;
		private IList _Attachments;

		public MailAttachments() {
			_Attachments=new ArrayList(); 
		}

		public string this[int index] {
			get { return (string)_Attachments[index];}
		}
		/// <summary>
		/// 添加邮件附件
		/// </summary>
		/// <param name="FilePath">附件的绝对路径</param>
		public void Add(params string[] filePath) {
			if(filePath==null) {
				throw(new ArgumentNullException("非法的附件"));
			}
			else {    
				for(int i=0;i<filePath.Length;i++) {
					Add(filePath[i]);
				}
			}
		}

		/// <summary>
		/// 添加一个附件,当指定的附件不存在时，忽略该附件，不产生异常。
		/// </summary>
		/// <param name="filePath">附件的绝对路径</param>
		public void Add(string  filePath) {
			//当附件存在时才加入,否则忽略
			if (System.IO.File.Exists(filePath)) {
				if (_Attachments.Count<MaxAttachmentNum) {
					_Attachments.Add(filePath);
				}
			}
		}

		public void Clear() {//清除所有附件
			_Attachments.Clear();
		}

		public int Count {//获取附件个数
			get { return _Attachments.Count;}
		}

	}
	#endregion//end Class mailAttachments

 

	#region Class MailMessage
	/// <summary>
	/// MailMessage 表示SMTP要发送的一封邮件的消息。
	/// </summary>
	public class MailMessage {

		private const int MaxRecipientNum=10;

		public MailMessage() {   
			_Recipients=new ArrayList();//收件人列表
			_Attachments=new MailAttachments();//附件
			_BodyFormat=MailFormat.Text;//缺省的邮件格式为Text
			_Priority=MailPriority.Normal;
			_Charset="GB2312";
		}

		/// <summary>
		/// 设定语言代码，默认设定为GB2312，如不需要可设置为""
		/// </summary>
		public string Charset {
			get { return _Charset;}
			set { _Charset=value;}
		}

		public string From {
			get{ return _From;}
			set { _From=value;}
		}

		public string FromName {
			get { return _FromName;}
			set { _FromName=value;}
		}
		public string Body {
			get { return _Body;}
			set { _Body=value;}
		}

		public string Subject {
			get { return _Subject;}
			set { _Subject=value;}
		}

		public MailAttachments Attachments {
			get {return _Attachments;}
			set { _Attachments=value;}
		}

		public MailPriority Priority {
			get { return _Priority;}
			set { _Priority=value;}
		}

		public IList Recipients {
			get { return _Recipients;}
		}
		/// <summary>
		/// 增加一个收件人地址
		/// </summary>
		/// <param name="recipient">收件人的Email地址</param>
		public void AddRecipients(string recipient) {
		//先检查邮件地址是否符合规范
			if (_Recipients.Count<MaxRecipientNum) {
				_Recipients.Add(recipient);//增加到收件人列表
			}
		}

		public void AddRecipients(params string[] recipient) {
			if (recipient==null) {
				throw (new ArgumentException("收件人不能为空."));
			}
			else {
				for (int i=0;i<recipient.Length;i++) {
					AddRecipients(recipient[i]);
				}
			}
		}

		public MailFormat BodyFormat {
			set { _BodyFormat=value;}
			get { return _BodyFormat;}
		}

		private string _From;//发件人地址
		private string _FromName;//发件人姓名
		private IList _Recipients;//收件人
		private MailAttachments _Attachments;//附件
		private string _Body;//内容
		private string _Subject;//主题
		private MailFormat _BodyFormat;//邮件格式
		private string _Charset="GB2312";//字符编码格式
		private MailPriority _Priority;//邮件优先级
	}
	#endregion 


	#region Class SmtpMail
	public class SmtpServerHelper {

			private string CRLF="\r\n";//回车换行

			/// <summary>
			/// 错误消息反馈
			/// </summary>
			private string errmsg;

			/// <summary>
			/// TcpClient对象，用于连接服务器
			/// </summary> 
			private TcpClient tcpClient;

			/// <summary>
			/// NetworkStream对象
			/// </summary> 
			private NetworkStream networkStream;

			/// <summary>
			/// 服务器交互记录
			/// </summary>
			private string logs="";

			/// <summary>
			/// SMTP错误代码哈希表
			/// </summary>
			private Hashtable ErrCodeHT = new Hashtable();

			/// <summary>
			/// SMTP正确代码哈希表
			/// </summary>
			private Hashtable RightCodeHT = new Hashtable();

			public SmtpServerHelper() {
				SMTPCodeAdd();//初始化SMTPCode
			}

			~SmtpServerHelper() {
				networkStream.Close();
				tcpClient.Close();
			}

			/// <summary>
			/// 将字符串编码为Base64字符串
			/// </summary>
			/// <param name="str">要编码的字符串</param>
			private string Base64Encode(string str) {
				byte[] barray;
				barray=Encoding.Default.GetBytes(str);
				return Convert.ToBase64String(barray);
			}

			/// <summary>
			/// 将Base64字符串解码为普通字符串
			/// </summary>
			/// <param name="str">要解码的字符串</param>
			private string Base64Decode(string str) {
				byte[] barray;
				barray=Convert.FromBase64String(str);
				return Encoding.Default.GetString(barray);
			}

			/// <summary>
			/// 得到上传附件的文件流
			/// </summary>
			/// <param name="FilePath">附件的绝对路径</param>
			private string GetStream(string FilePath) {
				//建立文件流对象
				System.IO.FileStream FileStr=new System.IO.FileStream(FilePath,System.IO.FileMode.Open);
				byte[] by=new byte[System.Convert.ToInt32(FileStr.Length)];
				FileStr.Read(by,0,by.Length);
				FileStr.Close();
				return(System.Convert.ToBase64String(by));
			}

			/// <summary>
			/// SMTP回应代码哈希表
			/// </summary>
			private void SMTPCodeAdd() {
				//[RFC 821 4.2.1.]
				/*
					4.2.2.  NUMERIC ORDER LIST OF REPLY CODES

				211 System status, or system help reply
				214 Help message
					[Information on how to use the receiver or the meaning of a
					particular non-standard command; this reply is useful only
					to the human user]
				220 <domain> Service ready
				221 <domain> Service closing transmission channel
				250 Requested mail action okay, completed
				251 User not local; will forward to <forward-path>
				          
				354 Start mail input; end with <CRLF>.<CRLF>
				          
				421 <domain> Service not available,
					closing transmission channel
					[This may be a reply to any command if the service knows it
					must shut down]
				450 Requested mail action not taken: mailbox unavailable
					[E.g., mailbox busy]
				451 Requested action aborted: local error in processing
				452 Requested action not taken: insufficient system storage
				          
				500 Syntax error, command unrecognized
					[This may include errors such as command line too long]
				501 Syntax error in parameters or arguments
				502 Command not implemented
				503 Bad sequence of commands
				504 Command parameter not implemented
				550 Requested action not taken: mailbox unavailable
					[E.g., mailbox not found, no access]
				551 User not local; please try <forward-path>
				552 Requested mail action aborted: exceeded storage allocation
				553 Requested action not taken: mailbox name not allowed
					[E.g., mailbox syntax incorrect]
				554 Transaction failed
				   
				*/

				ErrCodeHT.Add("421","服务未就绪，关闭传输信道");
				ErrCodeHT.Add("432","需要一个密码转换");
				ErrCodeHT.Add("450","要求的邮件操作未完成，邮箱不可用（例如，邮箱忙）");
				ErrCodeHT.Add("451","放弃要求的操作；处理过程中出错");
				ErrCodeHT.Add("452","系统存储不足，要求的操作未执行");
				ErrCodeHT.Add("454","临时认证失败");
				ErrCodeHT.Add("500","邮箱地址错误");
				ErrCodeHT.Add("501","参数格式错误");
				ErrCodeHT.Add("502","命令不可实现");
				ErrCodeHT.Add("503","服务器需要SMTP验证");
				ErrCodeHT.Add("504","命令参数不可实现");
				ErrCodeHT.Add("530","需要认证");
				ErrCodeHT.Add("534","认证机制过于简单");
				ErrCodeHT.Add("538","当前请求的认证机制需要加密");
				ErrCodeHT.Add("550","要求的邮件操作未完成，邮箱不可用（例如，邮箱未找到，或不可访问）");
				ErrCodeHT.Add("551","用户非本地，请尝试<forward-path>");
				ErrCodeHT.Add("552","过量的存储分配，要求的操作未执行");
				ErrCodeHT.Add("553","邮箱名不可用，要求的操作未执行（例如邮箱格式错误）");
				ErrCodeHT.Add("554","传输失败");
				   

				/*
				211 System status, or system help reply
				214 Help message
					[Information on how to use the receiver or the meaning of a
					particular non-standard command; this reply is useful only
					to the human user]
				220 <domain> Service ready
				221 <domain> Service closing transmission channel
				250 Requested mail action okay, completed
				251 User not local; will forward to <forward-path>
				          
				354 Start mail input; end with <CRLF>.<CRLF>
				*/

				RightCodeHT.Add("220","服务就绪");
				RightCodeHT.Add("221","服务关闭传输信道");
				RightCodeHT.Add("235","验证成功");
				RightCodeHT.Add("250","要求的邮件操作完成");
				RightCodeHT.Add("251","非本地用户，将转发向<forward-path>");
				RightCodeHT.Add("334","服务器响应验证Base64字符串");
				RightCodeHT.Add("354","开始邮件输入，以<CRLF>.<CRLF>结束");

			}

			/// <summary>
			/// 发送SMTP命令
			/// </summary> 
			private bool SendCommand(string str) {
				byte[]WriteBuffer;
				if(str==null||str.Trim()==String.Empty) {
					return true;
				}

				logs+=str;
				WriteBuffer = Encoding.Default.GetBytes(str);

				try {
					networkStream.Write(WriteBuffer,0,WriteBuffer.Length);
				}
				catch {
					errmsg="网络连接错误";
					return false;