//============================================================
// file: MailSender.cs
// 邮件发送组件
// 支持ESMTP, 多附件
//============================================================
namespace JcPersonal.Utility
{
using System;
using System.Collections;
using System.Net.Sockets;
using System.IO;
using System.Text;
///
/// Mail 发送器
///
public class MailSender
{
///
/// SMTP服务器域名
///
public string Server {
get { return server; }
set { if (value != server) server = value; }
} private string server = "";
///
/// SMTP服务器端口 [默认为25]
///
public int Port {
get { return port; }
set { if (value != port) port = value; }
} private int port = 25;
///
/// 用户名 [如果需要身份验证的话]
///
public string UserName {
get { return userName; }
set { if (value != userName) userName = value; }
} private string userName = "";
///
/// 密码 [如果需要身份验证的话]
///
public string Password {
get { return password; }
set { if (value != password) password = value; }
} private string password = "";
///
/// 发件人地址
///
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 = "";
///
/// 发件人姓名
///
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 = "";
///
/// 邮件的主题
///
public string Subject {
get { return subject; }
set { if (value != subject) subject = value; }
} private string subject = "";
///
/// 邮件正文
///
public string Body {
get { return body; }
set { if (value != body) body = value; }
} private string body = "";
///
/// 超文本格式的邮件正文
///
public string HtmlBody {
get { return htmlBody; }
set { if (value != htmlBody) htmlBody = value; }
} private string htmlBody = "";
///
/// 是否是html格式的邮件
///
public bool IsHtml {
get { return isHtml; }
set { if (value != isHtml) isHtml = value; }
} private bool isHtml = false;
///
/// 语言编码 [默认为GB2312]
///
public string LanguageEncoding {
get { return languageEncoding; }
set { if (value != languageEncoding) languageEncoding = value; }
} private string languageEncoding = "GB2312";
///
/// 邮件编码 [默认为8bit]
///
public string MailEncoding {
get { return encoding; }
set { if (value != encoding) encoding = value; }
} private string encoding = "8bit";
///
/// 邮件优先级 [默认为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 ();
///
/// 发送邮件
///
public void SendMail ()
{
// 创建TcpClient对象， 并建立连接
TcpClient tcp = null;
try
{
tcp = new TcpClient (server, port);
}
catch (Exception)
{
throw new Exception ("无法连接服务器");
}
ReadString (tcp.GetStream());//获取连接信息
// 开始进行服务器认证
// 如果状态码是250则表示操作成功
if (!Command (tcp.GetStream(), "EHLO Localhost", "250"))
throw new Exception ("登陆阶段失败");
if (userName != "")
{
// 需要身份验证
if (!Command (tcp.GetStream(), "AUTH LOGIN", "334"))
throw new Exception ("身份验证阶段失败");
string nameB64 = ToBase64 (userName); // 此处将username转换为Base64码
if (!Command (tcp.GetStream(), nameB64, "334"))
throw new Exception ("身份验证阶段失败");
string passB64 = ToBase64 (password); // 此处将password转换为Base64码
if (!Command (tcp.GetStream(), passB64, "235"))
throw new Exception ("身份验证阶段失败");
}
// 准备发送
WriteString (tcp.GetStream(), "mail From: " + from);
WriteString (tcp.GetStream(), "rcpt to: " + to);
WriteString (tcp.GetStream(), "data");
// 发送邮件头
WriteString (tcp.GetStream(), "Date: " + DateTime.Now); // 时间
WriteString (tcp.GetStream(), "From: " + fromName + ""); // 发件人
WriteString (tcp.GetStream(), "Subject: " + subject); // 主题
WriteString (tcp.GetStream(), "To:" + toName + ""); // 收件人
//邮件格式
WriteString (tcp.GetStream(), "Content-Type: multipart/mixed; boundary=\"unique-boundary-1\"");
WriteString (tcp.GetStream(), "Reply-To:" + from); // 回复地址
WriteString (tcp.GetStream(), "X-Priority:" + priority); // 优先级
WriteString (tcp.GetStream(), "MIME-Version:1.0"); // MIME版本
// 数据ID,随意
// WriteString (tcp.GetStream(), "Message-Id: " + DateTime.Now.ToFileTime() + "@security.com");
WriteString (tcp.GetStream(), "Content-Transfer-Encoding:" + encoding); // 内容编码
WriteString (tcp.GetStream(), "X-Mailer:JcPersonal.Utility.MailSender"); // 邮件发送者
WriteString (tcp.GetStream(), "");
WriteString (tcp.GetStream(), ToBase64 ("This is a multi-part message in MIME format."));
WriteString (tcp.GetStream(), "");
// 从此处开始进行分隔输入
WriteString (tcp.GetStream(), "--unique-boundary-1");
// 在此处定义第二个分隔符
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(), "");//一个部分写完之后就写如空信息，分段
WriteString (tcp.GetStream(), "--unique-boundary-2--");//分隔符的结束符号，尾巴后面多了--
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--");//分隔符的结束符号，尾巴后面多了--
WriteString (tcp.GetStream(), "");
}
// 发送附件
// 对文件列表做循环
for (int i = 0; i {WriteString (tcp.GetStream(), "--unique-boundary-1"); // 邮件内容分隔符WriteString (tcp.GetStream(), "Content-Type: application/octet-stream;name=\"" + ((AttachmentInfo)attachments[i]).FileName + "\""); // 文件格式WriteString (tcp.GetStream(), "Content-Transfer-Encoding: base64"); // 内容的编码WriteString (tcp.GetStream(), "Content-Disposition:attachment;filename=\"" + ((AttachmentInfo)attachments[i]).FileName + "\""); // 文件名WriteString (tcp.GetStream(), "");WriteString (tcp.GetStream(), ((AttachmentInfo)attachments[i]).Bytes); // 写入文件的内容WriteString (tcp.GetStream(), "");}Command (tcp.GetStream(), ".", "250"); // 最后写完了，输入"."// 关闭连接tcp.Close ();}////// 向流中写入字符//////来自TcpClient的流///写入的字符protected void WriteString (NetworkStream netStream, string str){str = str + "\r\n"; // 加入换行符// 将命令行转化为byte[]byte[] bWrite = Encoding.GetEncoding(languageEncoding).GetBytes(str.ToCharArray());// 由于每次写入的数据大小是有限制的，那么我们将每次写入的数据长度定在７５个字节，一旦命令长度超过了７５，就分步写入。int start=0;int length=bWrite.Length;int page=0;int size=75;int count=size;try{if (length75){// 数据分页if ((length/size)*sizepage=length/size+1;elsepage=length/size;for (int i=0;i{start=i*size;if (i==page-1)count=length-(i*size);netStream.Write(bWrite,start,count);// 将数据写入到服务器上}}elsenetStream.Write(bWrite,0,bWrite.Length);}catch(Exception){// 忽略错误}}////// 从流中读取字符//////来自TcpClient的流///读取的字符protected string ReadString (NetworkStream netStream){string sp = null;byte[] by = new byte[1024];int size = netStream.Read(by,0,by.Length);// 读取数据流if (size0){sp = Encoding.Default.GetString(by);// 转化为String}return sp;}////// 发出命令并判断返回信息是否正确//////来自TcpClient的流///命令///正确的状态码///是否正确protected bool Command (NetworkStream netStream, string command, string state){string sp=null;bool success=false;try{WriteString (netStream, command);// 写入命令sp = ReadString (netStream);// 接受返回信息if (sp.IndexOf(state) != -1)// 判断状态码是否正确success=true;}catch(Exception){// 忽略错误}return success;}////// 字符串编码为Base64//////字符串///Base64编码的字符串protected string ToBase64 (string str){try{byte[] by = Encoding.Default.GetBytes (str.ToCharArray());str = Convert.ToBase64String (by);}catch(Exception){// 忽略错误}return str;}////// 附件信息///public struct AttachmentInfo{////// 附件的文件名 [如果输入路径，则自动转换为文件名]///public string FileName {get { return fileName; }set { fileName = Path.GetFileName(value); }} private string fileName;////// 附件的内容 [由经Base64编码的字节组成]///public string Bytes {get { return bytes; }set { if (value != bytes) bytes = value; }} private string bytes;////// 从流中读取附件内容并构造//////附件的文件名///流public AttachmentInfo (string ifileName, Stream stream){fileName = Path.GetFileName (ifileName);byte[] by = new byte [stream.Length];stream.Read (by,0,(int)stream.Length); // 读取文件内容//格式转换bytes = Convert.ToBase64String (by); // 转化为base64编码}////// 按照给定的字节构造附件//////附件的文件名///附件的内容 [字节]public AttachmentInfo (string ifileName, byte[] ibytes){fileName = Path.GetFileName (ifileName);bytes = Convert.ToBase64String (ibytes); // 转化为base64编码}////// 从文件载入并构造//////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); // 读取文件内容//格式转换bytes = Convert.ToBase64String (by); // 转化为base64编码file.Close ();}}}}--------------------------------------------------------------------------------// 使用:MailSender ms = new MailSender ();ms.From = "jovenc@tom.com";ms.To = "jovenc@citiz.net";ms.Subject = "Subject";ms.Body = "body text";ms.UserName = "########"; // 怎么能告诉你呢ms.Password = "********"; // 怎么能告诉你呢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);},
