C# - MailSender 郵件傳送元件原始碼 (支援ESMTP, 附件) (轉)[@more@]

//============================================================
// File: Sender.cs
// 傳送
// 支援ESMTP, 多附件
//============================================================

namespace JcPersonal.Utility
{
using System;
using System.Collections;
using System.Sockets;
using System.IO;
using System.Text;

///

/// Mail 傳送器
///

public class MailSender
{
///

/// SMTP域名
///

public string Server {
get { return server; }
set { if (value != server) server = value; }
} private string server = "";

///

/// SMTP伺服器埠 [預設為25]
///

public int Port {
get { return port; }
set { if (value != port) port = value; }
} private int port = 25;

///

/// 名 [如果需要身份驗證的話]
///

public string UserName {
get { return userName; }
set { if (value != userName) userName = value; }
} private string userName = "";

///

/// 密碼 [如果需要身份驗證的話]
///

public string Pass {
get { return password; }
set { if (value != password) password = value; }
} private string password = "";

///

/// 發件人地址
///

public string From {
get { return from; }
set { if (value != from) from = value;}
} private string from = "";

///

/// 收件人地址
///

public string To {
get { return to; }
set { if (value != to) to = value;}
} private string to = "";

///

/// 發件人姓名
///

public string FromName {
get { return fromName; }
set { if (value != fromName) fromName = value; }
} private string fromName = "";

///

/// 收件人姓名
///

public string ToName {
get { return toName; }
set { if (value != toName) toName = value; }
} private string toName = "";

///

/// 郵件的主題
///

public string Subject {
get { return subject; }
set { if (value != subject) subject = value; }
} private string subject = "";

///

/// 郵件正文
///

public string Body {
get { return body; }
set { if (value != body) body = value; }
} private string body = "";

///

/// 超文字格式的郵件正文
///

public string HtmlBody {
get { return htmlBody; }
set { if (value != htmlBody) htmlBody = value; }
} private string htmlBody = "";

///

/// 是否是html格式的郵件
///

public bool IsHtml {
get { return isHtml; }
set { if (value != isHtml) isHtml = value; }
} private bool isHtml = false;

///

/// 語言編碼 [預設為GB2312]
///

public string LanguageEncoding {
get { return languageEncoding; }
set { if (value != languageEncoding) languageEncoding = value; }
} private string languageEncoding = "GB2312";

///

/// 郵件編碼 [預設為8bit]
///

public string MailEncoding {
get { return encoding; }
set { if (value != encoding) encoding = value; }
} private string encoding = "8bit";

///

/// 郵件優先順序 [預設為3]
///

public int Priority {
get { return priority; }
set { if (value != priority) priority = value; }
} private int priority = 3;

///

/// 附件 [AttachmentInfo]
///

public IList Attachments {
get { return attachments; }
// set { if (value != attachments) attachments = value; }
} private ArrayList attachments = new ArrayList ();

///

/// 傳送郵件
///

public void ()
{
// 建立TcpClient，並建立連線
TcpClient tcp = null;
try
{
tcp = new TcpClient (server, port);
}
catch (Exception)
{
throw new Exception ("無法連線伺服器");
}

ReadString (tcp.GetStream());//獲取連線資訊

// 開始進行伺服器
// 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");
}

// 準備傳送
WriteString (tcp.GetStream(), "mail From: " + from);
WriteString (tcp.GetStream(), "rcpt to: " + to);
WriteString (tcp.GetStream(), "data");

// 傳送郵件頭
WriteString (tcp.GetStream(), "Date: " + DateTime.Now); // 時間
WriteString (tcp.GetStream(), "From: " + fromName + ""); // 發件人
WriteString (tcp.GetStream(), "Subject: " + subject); // 主題
WriteString (tcp.GetStream(), "To:" + toName + ""); // 收件人

//郵件格式
WriteString (tcp.GetStream(), "Content-Type: multipart/mixed; boundary="unique-boundary-1"");
WriteString (tcp.GetStream(), "Reply-To:" + from); // 回覆地址
WriteString (tcp.GetStream(), "X-Priority:" + priority); // 優先順序
WriteString (tcp.GetStream(), "MIME-Version:1.0"); // MIME版本

// 資料ID,隨意
// WriteString (tcp.GetStream(), "Message-Id: " + DateTime.Now.ToFileTime() + "@security.com");
WriteString (tcp.GetStream(), "Content-Traner-Encoding:" + encoding); // 內容編碼
WriteString (tcp.GetStream(), "X-Mailer:JcPersonal.Utility.MailSender"); // 郵件傳送者
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)
{
// 文字資訊
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資訊，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資訊
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(), "");
}

// 傳送附件
// 對列表做迴圈
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[i]).FileName + """); // 檔案格式
WriteString (tcp.GetStream(), "Content-Transfer-Encoding: base64"); // 內容的編碼
WriteString (tcp.GetStream(), "Content-Disposition:attachment;filename="" + ((AttachmentInfo)attachments[i]).FileName + """); // 檔名
WriteString (tcp.GetStream(), "");
WriteString (tcp.GetStream(), ((AttachmentInfo)attachments[i]).Bytes); // 寫入檔案的內容
WriteString (tcp.GetStream(), "");
}

Command (tcp.GetStream(), ".", "250"); // 最後寫完了，輸入"."

// 關閉連線
tcp.Close ();
}

///

/// 向流中寫入字元
///

/// 來自TcpClient的流
/// 寫入的字元
protected void WriteStringworkStream netStream, string str)
{
str = str + " "; // 加入換行符

// 將命令列轉化為byte[]
byte[] bWrite = Encoding.GetEncoding(languageEncoding).GetBytes(str.ToCharArray());

// 由於每次寫入的資料大小是有限制的，那麼我們將每次寫入的資料長度定在７５個位元組，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)
{
// 資料分頁
if ((length/size)*size page=length/size+1;
else
page=length/size;
for (int i=0;i {
start=i*size;
if (i==page-1)
count=length-(i*size);
netStream.Write(bWrite,start,count);// 將資料寫入到伺服器上
}
}
else
netStream.Write(bWrite,0,bWrite.Length);
}
catch(Exception)
{
// 忽略錯誤
}
}

///

/// 從流中讀取字元
///

/// 來自TcpClient的流
/// 讀取的字元
protected string ReadString (NetworkStream netStream)
{
string sp = null;
byte[] by = new byte[1024];
int size = netStream.Read(by,0,by.Length);// 讀取資料流
if (size > 0)
{
sp = Encoding.Default.GetString(by);// 轉化為String
}
return sp;
}

///

/// 發出命令並判斷返回資訊是否正確
///

/// 來自TcpClient的流
/// 命令
/// 正確的狀態碼
/// 是否正確
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);// 接受返回資訊
if (sp.IndexOf(state) != -1)// 判斷狀態碼是否正確
success=true;
}
catch(Exception)
{
// 忽略錯誤
}
return success;
}

///

/// 字串編碼為Base64
///

/// 字串
/// Base64編碼的字串
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;
}

///

/// 附件資訊
///

public struct AttachmentInfo
{
///

/// 附件的檔名 [如果輸入路徑，則自動轉換為檔名]
///

public string FileName {
get { return fileName; }
set { fileName = Path.GetFileName(value); }
} private string fileName;

///

/// 附件的內容 [由經Base64編碼的位元組組成]
///

public string Bytes {
get { return bytes; }
set { if (value != bytes) bytes = value; }
} private string bytes;

///

/// 從流中讀取附件內容並構造
///

/// 附件的檔名
/// 流
public AttachmentInfo (string ifileName, Stream stream)
{
fileName = Path.GetFileName (ifileName);
byte[] by = new byte [stream.Length];
stream.Read (by,0,(int)stream.Length); // 讀取檔案內容
//格式轉換
bytes = Convert.ToBase64String (by); // 轉化為base64編碼
}

///

/// 按照給定的位元組構造附件
///

/// 附件的檔名
/// 附件的內容 [位元組]
public AttachmentInfo (string ifileName, byte[] ibytes)
{
fileName = Path.GetFileName (ifileName);
bytes = Convert.ToBase64String (ibytes); // 轉化為base64編碼
}

///

/// 從檔案載入並構造
///

///
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); // 讀取檔案內容
//格式轉換
bytes = Convert.ToBase64String (by); // 轉化為base64編碼
file.Close ();
}
}
}
}

// 使用:

MailSender ms = new MailSender ();
ms.From = "";
ms.To = "";
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);
}

C# - MailSender 郵件傳送元件原始碼 (支援ESMTP, 附件) (轉)

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