//============================================================
// File: MailSender.cs
// 郵件發送組件
// 支持ESMTP, 多附件
//============================================================
namespace JcPersonal.Utility
{
using System;
using System.Collections;
using System.Net.Sockets;
using System.IO;
using System.Text;
/// <summary>
/// Mail 發送器
/// </summary>
public class MailSender
{
/// <summary>
/// SMTP服務器域名
/// </summary>
public string Server {
get { return server; }
set { if (value != server) server = value; }
} private string server = "";
/// <summary>
/// SMTP服務器端口 [默認為25]
/// </summary>
public int Port {
get { return port; }
set { if (value != port) port = value; }
} private int port = 25;
/// <summary>
/// 用戶名 [如果需要身份驗證的話]
/// </summary>
public string UserName {
get { return userName; }
set { if (value != userName) userName = value; }
} private string userName = "";
/// <summary>
/// 密碼 [如果需要身份驗證的話]
/// </summary>
public string PassWord {
get { return passWord; }
set { if (value != password) passWord = value; }
} private string passWord = "";
/// <summary>
/// 發件人地址
/// </summary>
public string From {
get { return from; }
set { if (value != from) from = value;}
} private string from = "";
/// <summary>
/// 收件人地址
/// </summary>
public string To {
get { return to; }
set { if (value != to) to = value;}
} private string to = "";
/// <summary>
/// 發件人姓名
/// </summary>
public string FromName {
get { return fromName; }
set { if (value != fromName) fromName = value; }
} private string fromName = "";
/// <summary>
/// 收件人姓名
/// </summary>
public string ToName {
get { return toName; }
set { if (value != toName) toName = value; }
} private string toName = "";
/// <summary>
/// 郵件的主題
/// </summary>
public string Subject {
get { return subject; }
set { if (value != subject) subject = value; }
} private string subject = "";
/// <summary>
/// 郵件正文
/// </summary>
public string Body {
get { return body; }
set { if (value != body) body = value; }
} private string body = "";
/// <summary>
/// 超文本格式的郵件正文
/// </summary>
public string HtmlBody {
get { return HtmlBody; }
set { if (value != htmlBody) HtmlBody = value; }
} private string HtmlBody = "";
/// <summary>
/// 是否是Html格式的郵件
/// </summary>
public bool IsHtml {
get { return isHtml; }
set { if (value != isHtml) isHtml = value; }
} private bool isHtml = false;
/// <summary>
/// 語言編碼 [默認為GB2312]
/// </summary>
public string LanguageEncoding {
get { return languageEncoding; }
set { if (value != languageEncoding) languageEncoding = value; }
} private string languageEncoding = "GB2312";
/// <summary>
/// 郵件編碼 [默認為8bit]
/// </summary>
public string MailEncoding {
get { return encoding; }
set { if (value != encoding) encoding = value; }
} private string encoding = "8bit";
/// <summary>
/// 郵件優先級 [默認為3]
/// </summary>
public int Priority {
get { return priority; }
set { if (value != priority) priority = value; }
} private int priority = 3;
/// <summary>
/// 附件 [AttachmentInfo]
/// </summary>
public IList Attachments {
get { return attachments; }
// set { if (value != attachments) attachments = value; }
} private ArrayList attachments = new ArrayList ();
/// <summary>
/// 發送郵件
/// </summary>
public void SendMail ()
{
// 創建TcpClIEnt對象, 並建立連接
TcpClIEnt tcp = null;
try
{
tcp = new TcpClIEnt (server, port);
}
catch (Exception)
{
throw new Exception ("無法連接服務器");
}
ReadString (tcp.GetStream());//獲取連接信息
// 開始進行服務器認證
// 如果狀態碼是250則表示操作成功
if (!Command (tcp.GetStream(), "EHLO Localhost", "250"))
throw new Exception ("登陸階段失敗");
if (userName != "")
{
// 需要身份驗證
if (!Command (tcp.GetStream(), "AUTH LOGIN", "334"))
throw new Exception ("身份驗證階段失敗");
string nameB64 = ToBase64 (userName); // 此處將username轉換為Base64碼
if (!Command (tcp.GetStream(), nameB64, "334"))
throw new Exception ("身份驗證階段失敗");
string passB64 = ToBase64 (password); // 此處將passWord轉換為Base64碼
if (!Command (tcp.GetStream(), passB64, "235"))
throw new Exception ("身份驗證階段失敗");
}
// 准備發送
WriteString (tcp.GetStream(), "mail From: " + from);
WriteString (tcp.GetStream(), "rcpt to: " + to);
WriteString (tcp.GetStream(), "data");
// 發送郵件頭
WriteString (tcp.GetStream(), "Date: " + DateTime.Now); // 時間
WriteString (tcp.GetStream(), "From: " + fromName + "<" + from + ">"); // 發件人
WriteString (tcp.GetStream(), "Subject: " + subject); // 主題
WriteString (tcp.GetStream(), "To:" + toName + "<" + to + ">"); // 收件人
//郵件格式
WriteString (tcp.GetStream(), "Content-Type: multipart/mixed; boundary="unique-boundary-1"");
WriteString (tcp.GetStream(), "Reply-To:" + from); // 回復地址
WriteString (tcp.GetStream(), "X-Priority:" + priority); // 優先級
WriteString (tcp.GetStream(), "MIME-Version:1.0"); // MIME版本
// 數據ID,隨意
// WriteString (tcp.GetStream(), "Message-Id: " + DateTime.Now.ToFileTime() + "@security.com");
WriteString (tcp.GetStream(), "Content-Transfer-Encoding:" + encoding); // 內容編碼
WriteString (tcp.GetStream(), "X-Mailer:JcPersonal.Utility.MailSender"); // 郵件發送者
WriteString (tcp.GetStream(), "");
WriteString (tcp.GetStream(), ToBase64 ("This is a multi-part message in MIME format."));
WriteString (tcp.GetStream(), "");
// 從此處開始進行分隔輸入
WriteString (tcp.GetStream(), "--unique-boundary-1");
// 在此處定義第二個分隔符
WriteString (tcp.GetStream(), "Content-Type: multipart/alternative;Boundary="unique-boundary-2"");
WriteString (tcp.GetStream(), "");
if(!isHtml)
{
// 文本信息
WriteString (tcp.GetStream(), "--unique-boundary-2");
WriteString (tcp.GetStream(), "Content-Type: text/plain;charset=" + languageEncoding);
WriteString (tcp.GetStream(), "Content-Transfer-Encoding:" + encoding);
WriteString (tcp.GetStream(), "");
WriteString (tcp.GetStream(), body);
WriteString (tcp.GetStream(), "");//一個部分寫完之後就寫如空信息,分段
WriteString (tcp.GetStream(), "--unique-boundary-2--");//分隔符的結束符號,尾巴後面多了--
WriteString (tcp.GetStream(), "");
}
else
{
//Html信息
WriteString (tcp.GetStream(), "--unique-boundary-2");
WriteString (tcp.GetStream(), "Content-Type: text/Html;charset=" + languageEncoding);
WriteString (tcp.GetStream(), "Content-Transfer-Encoding:" + encoding);
WriteString (tcp.GetStream(), "");
WriteString (tcp.GetStream(), HtmlBody);
WriteString (tcp.GetStream(), "");
WriteString (tcp.GetStream(), "--unique-boundary-2--");//分隔符的結束符號,尾巴後面多了--
WriteString (tcp.GetStream(), "");
}
// 發送附件
// 對文件列表做循環
for (int i = 0; i < attachments.Count; i++)
{
WriteString (tcp.GetStream(), "--unique-boundary-1"); // 郵件內容分隔符
WriteString (tcp.GetStream(), "Content-Type: application/octet-stream;name="" + ((AttachmentInfo)attachments).FileName + """); // 文件格式
WriteString (tcp.GetStream(), "Content-Transfer-Encoding: base64"); // 內容的編碼
WriteString (tcp.GetStream(), "Content-Disposition:attachment;filename="" + ((AttachmentInfo)attachments).FileName + """); // 文件名
WriteString (tcp.GetStream(), "");
WriteString (tcp.GetStream(), ((AttachmentInfo)attachments).Bytes); // 寫入文件的內容
WriteString (tcp.GetStream(), "");
}
Command (tcp.GetStream(), ".", "250"); // 最後寫完了,輸入"."
// 關閉連接
tcp.Close ();
}
/// <summary>
/// 向流中寫入字符
/// </summary>
/// <param name="netStream">來自TcpClIEnt的流</param>
/// <param name="str">寫入的字符</param>
protected void WriteString (NetworkStream netStream, string str)
{
str = str + " "; // 加入換行符
// 將命令行轉化為byte[]
byte[] bWrite = Encoding.GetEncoding(languageEncoding).GetBytes(str.ToCharArray());
// 由於每次寫入的數據大小是有限制的,那麼我們將每次寫入的數據長度定在75個字節,一旦命令長度超過了75,就分步寫入。
int start=0;
int length=bWrite.Length;
int page=0;
int size=75;
int count=size;
try
{
if (length>75)
{
// 數據分頁
if ((length/size)*size<length)
page=length/size+1;
else
page=length/size;
for (int i=0;i<page;i++)
{
start=i*size;
if (i==page-1)
count=length-(i*size);
netStream.Write(bWrite,start,count);// 將數據寫入到服務器上
}
}
else
netStream.Write(bWrite,0,bWrite.Length);
}
catch(Exception)
{
// 忽略錯誤
}
}
/// <summary>
/// 從流中讀取字符
/// </summary>
/// <param name="netStream">來自TcpClIEnt的流</param>
/// <returns>讀取的字符</returns>
protected string ReadString (NetworkStream netStream)
{
string sp = null;
byte[] by = new byte[1024];
int size = netStream.Read(by,0,by.Length);// 讀取數據流
if (size > 0)
{
sp = Encoding.Default.GetString(by);// 轉化為String
}
return sp;
}
/// <summary>
/// 發出命令並判斷返回信息是否正確
/// </summary>
/// <param name="netStream">來自TcpClIEnt的流</param>
/// <param name="command">命令</param>
/// <param name="state">正確的狀態碼</param>
/// <returns>是否正確</returns>
protected bool Command (NetworkStream netStream, string command, string state)
{
string sp=null;
bool success=false;
try
{
WriteString (netStream, command);// 寫入命令
sp = ReadString (netStream);// 接受返回信息
if (sp.IndexOf(state) != -1)// 判斷狀態碼是否正確
success=true;
}
catch(Exception)
{
// 忽略錯誤
}
return success;
}
/// <summary>
/// 字符串編碼為Base64
/// </summary>
/// <param name="str">字符串</param>
/// <returns>Base64編碼的字符串</returns>
protected string ToBase64 (string str)
{
try
{
byte[] by = Encoding.Default.GetBytes (str.ToCharArray());
str = Convert.ToBase64String (by);
}
catch(Exception)
{
// 忽略錯誤
}
return str;
}
/// <summary>
/// 附件信息
/// </summary>
public struct AttachmentInfo
{
/// <summary>
/// 附件的文件名 [如果輸入路徑,則自動轉換為文件名]
/// </summary>
public string FileName {
get { return fileName; }
set { fileName = Path.GetFileName(value); }
} private string fileName;
/// <summary>
/// 附件的內容 [由經Base64編碼的字節組成]
/// </summary>
public string Bytes {
get { return bytes; }
set { if (value != bytes) bytes = value; }
} private string bytes;
/// <summary>
/// 從流中讀取附件內容並構造
/// </summary>
/// <param name="ifileName">附件的文件名</param>
/// <param name="stream">流</param>
public AttachmentInfo (string ifileName, Stream stream)
{
fileName = Path.GetFileName (ifileName);
byte[] by = new byte [stream.Length];
stream.Read (by,0,(int)stream.Length); // 讀取文件內容
//格式轉換
bytes = Convert.ToBase64String (by); // 轉化為base64編碼
}
/// <summary>
/// 按照給定的字節構造附件
/// </summary>
/// <param name="ifileName">附件的文件名</param>
/// <param name="ibytes">附件的內容 [字節]</param>
public AttachmentInfo (string ifileName, byte[] ibytes)
{
fileName = Path.GetFileName (ifileName);
bytes = Convert.ToBase64String (ibytes); // 轉化為base64編碼
}
/// <summary>
/// 從文件載入並構造
/// </summary>
/// <param name="path"></param>
public AttachmentInfo (string path)
{
fileName = Path.GetFileName (path);
FileStream file = new FileStream (path, FileMode.Open);
byte[] by = new byte [file.Length];
file.Read (by,0,(int)file.Length); // 讀取文件內容
//格式轉換
bytes = Convert.ToBase64String (by); // 轉化為base64編碼
file.Close ();
}
}
}
}
--------------------------------------------------------------------------------
// 使用:
MailSender ms = new MailSender ();
ms.From = "[email protected]";
ms.To = "[email protected]";
ms.Subject = "Subject";
ms.Body = "body text";
ms.UserName = "########"; // 怎麼能告訴你呢
ms.PassWord = "********"; // 怎麼能告訴你呢
ms.Server = "smtp.tom.com";
ms.Attachments.Add (new MailSender.AttachmentInfo (@"D: est.txt"));
Console.WriteLine ("mail sending...");
try
{
ms.SendMail ();
Console.WriteLine ("mail sended.");
}
catch (Exception e)
{
Console.WriteLine (e);
}