//============================================================
// 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[i]).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[i]).FileName + "\"");; // 文件名
WriteString (tcp.GetStream(), "");;
WriteString (tcp.GetStream(), ((AttachmentInfo)attachments[i]).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 + "\r\n";; // 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:\test.txt"));;
Console.WriteLine ("mail sending...");;
try
{
ms.SendMail ();;
Console.WriteLine ("mail sended.");;
}
catch (Exception e)
{
Console.WriteLine (e);;
}