using system;
using system.text;
using system.io;
using system.net;
using system.net.sockets;
using system.collections;
namespace lion_office.data.library.mailclass
{
/*
create by lion
2002-11-20 01:44
copyright (c) 2001,2002 www.lionsky.net. all rights reserved.
web: http://www.lionsky.net
email: [email protected]
support .net framework beta 2
*/
public class esmtpmail
{
private string enter="/r/n";
/// <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="gb2312";
/// <summary>
/// 发件人地址
/// </summary>
public string from="";
/// <summary>
/// 发件人姓名
/// </summary>
public string fromname="";
/// <summary>
/// 回复邮件地址
/// </summary>
//public string replyto="";
/// <summary>
/// 收件人姓名
/// </summary>
public string recipientname="";
/// <summary>
/// 收件人列表
/// </summary>
private hashtable recipient=new hashtable();
/// <summary>
/// 邮件服务器域名
/// </summary>
private string mailserver="";
/// <summary>
/// 邮件服务器端口号
/// </summary>
private int mailserverport=25;
/// <summary>
/// smtp认证时使用的用户名
/// </summary>
private string username="";
/// <summary>
/// smtp认证时使用的密码
/// </summary>
private string password="";
/// <summary>
/// 是否需要smtp验证
/// </summary>
private bool esmtp=false;
/// <summary>
/// 是否html邮件
/// </summary>
public bool html=false;
/// <summary>
/// 邮件附件列表
/// </summary>
private system.collections.arraylist attachments;
/// <summary>
/// 邮件发送优先级，可设置为"high","normal","low"或"1","3","5"
/// </summary>
private string priority="normal";
/// <summary>
/// 邮件主题
/// </summary>
public string subject="";
/// <summary>
/// 邮件正文
/// </summary>
public string body="";
/// <summary>
/// 收件人数量
/// </summary>
private int recipientnum=0;
/// <summary>
/// 最多收件人数量
/// </summary>
private int recipientmaxnum=1;
/// <summary>
/// 密件收件人数量
/// </summary>
//private int recipientbccnum=0;
/// <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 tc;
/// <summary>
/// networkstream对象
/// </summary>
private networkstream ns;
/// <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 esmtpmail()
{
attachments = new system.collections.arraylist();
}
/// <summary>
/// 邮件服务器域名和验证信息
/// 形如："user:[email protected]:25"，也可省略次要信息。如"user:[email protected]"或"www.server.com"
/// </summary>
public string maildomain
{
set
{
string maidomain=value.trim();
int tempint;
if(maidomain!="")
{
tempint=maidomain.indexof("@");
if(tempint!=-1)
{
string str=maidomain.substring(0,tempint);
mailserverusername=str.substring(0,str.indexof(":"));
mailserverpassword=str.substring(str.indexof(":")+1,str.length-str.indexof(":")-1);
maidomain=maidomain.substring(tempint+1,maidomain.length-tempint-1);
}
tempint=maidomain.indexof(":");
if(tempint!=-1)
{
mailserver=maidomain.substring(0,tempint);
mailserverport=system.convert.toint32(maidomain.substring(tempint+1,maidomain.length-tempint-1));
}
else
{
mailserver=maidomain;
}
}
}
}
/// <summary>
/// 邮件服务器端口号
/// </summary>
public int maildomainport
{
set
{
mailserverport=value;
}
}
/// <summary>
/// smtp认证时使用的用户名
/// </summary>
public string mailserverusername
{
set
{
if(value.trim()!="")
{
username=value.trim();
esmtp=true;
}
else
{
username="";
esmtp=false;
}
}
}
/// <summary>
/// smtp认证时使用的密码
/// </summary>
public string mailserverpassword
{
set
{
password=value;
}
}
/// <summary>
/// 邮件发送优先级，可设置为"high","normal","low"或"1","3","5"
/// </summary>
public string priority
{
set
{
switch(value.tolower())
{
case "high":
priority="high";
break;
case "1":
priority="high";
break;
case "normal":
priority="normal";
break;
case "3":
priority="normal";
break;
case "low":
priority="low";
break;
case "5":
priority="low";
break;
default:
priority="normal";
break;
}
}
}
/// <summary>
/// 错误消息反馈
/// </summary>
public string errormessage
{
get
{
return errmsg;
}
}
/// <summary>
/// 服务器交互记录
/// </summary>
private string logs="";
/// <summary>
/// 服务器交互记录，如发现本组件不能使用的smtp服务器，请将出错时的logs发给我（[email protected]），我将尽快查明原因。
/// </summary>
public string logs
{
get
{
return logs;
}
}
/// <summary>
/// smtp回应代码哈希表
/// </summary>
private void smtpcodeadd()
{
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("421","服务未就绪，关闭传输信道");
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("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("451","放弃要求的操作；处理过程中出错");
errcodeht.add("551","用户非本地，请尝试<forward-path>");
errcodeht.add("452","系统存储不足，要求的操作未执行");
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("432","需要一个密码转换");
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("454","临时认证失败");
errcodeht.add("530","需要认证");
rightcodeht.add("220","服务就绪");
rightcodeht.add("250","要求的邮件操作完成");
rightcodeht.add("251","用户非本地，将转发向<forward-path>");
rightcodeht.add("354","开始邮件输入，以<enter>.<enter>结束");
rightcodeht.add("221","服务关闭传输信道");
rightcodeht.add("334","服务器响应验证base64字符串");
rightcodeht.add("235","验证成功");
}
/// <summary>
/// 将字符串编码为base64字符串
/// </summary>
/// <param name="estr">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="dstr">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>
/// 添加邮件附件
/// </summary>
/// <param name="path">附件绝对路径</param>
public void addattachment(string path)
{
attachments.add(path);
}
/// <summary>
/// 添加一个收件人
/// </summary>
/// <param name="str">收件人地址</param>
public bool addrecipient(string str)
{
str=str.trim();
if(str==null||str==""||str.indexof("@")==-1)
return true;
if(recipientnum<recipientmaxnum)
{
recipient.add(recipientnum,str);
recipientnum++;
return true;
}
else
{
errmsg+="收件人过多";
return false;
}
}
/// <summary>
/// 最多收件人数量
/// </summary>
public int recipientmaxnum
{
set
{
recipientmaxnum = value;
}
}
/// <summary>
/// 添加一组收件人（不超过recipientmaxnum个），参数为字符串数组
/// </summary>
/// <param name="str">保存有收件人地址的字符串数组（不超过recipientmaxnum个）</param>
public bool addrecipient(string[] str)
{
for(int i=0;i<str.length;i++)
{
if(!addrecipient(str[i]))
{
return false;
}
}
return true;
}
/// <summary>
/// 发送smtp命令
/// </summary>
private bool sendcommand(string str)
{
byte[] writebuffer;
if(str==null||str.trim()=="")
{
return true;
}
logs+=str;
writebuffer = encoding.default.getbytes(str);
try
{
ns.write(writebuffer,0,writebuffer.length);
}
catch
{
errmsg="网络连接错误";
return false;
}
return true;
}
/// <summary>
/// 接收smtp服务器回应
/// </summary>
private string recvresponse()
{
int streamsize;
string returnvalue = "";
byte[] readbuffer = new byte[1024] ;
try
{
streamsize=ns.read(readbuffer,0,readbuffer.length);
}
catch
{
errmsg="网络连接错误";
return "false";
}
if (streamsize==0)
{
return returnvalue ;
}
else
{
returnvalue = encoding.default.getstring(readbuffer).substring(0,streamsize);
logs+=returnvalue;
return returnvalue;
}
}
/// <summary>
/// 与服务器交互，发送一条命令并接收回应。
/// </summary>
/// <param name="command">一个要发送的命令</param>
/// <param name="errstr">如果错误，要反馈的信息</param>
private bool dialog(string str,string errstr)
{
if(str==null||str.trim()=="")
{
return true;
}
if(sendcommand(str))
{
string rr=recvresponse();
if(rr=="false")
{
return false;
}
string rrcode=rr.substring(0,3);
if(rightcodeht[rrcode]!=null)
{
return true;
}
else
{
if(errcodeht[rrcode]!=null)
{
errmsg+=(rrcode+errcodeht[rrcode].tostring());
errmsg+=enter;
}
else
{
errmsg+=rr;
}
errmsg+=errstr;
return false;
}
}
else
{
return false;
}
}
/// <summary>
/// 与服务器交互，发送一组命令并接收回应。
/// </summary>
private bool dialog(string[] str,string errstr)
{
for(int i=0;i<str.length;i++)
{
if(!dialog(str[i],""))
{
errmsg+=enter;
errmsg+=errstr;
return false;
}
}
return true;
}
private bool sendemail()
{
//连接网络
try
{
tc=new tcpclient(mailserver,mailserverport);
}
catch(exception e)
{
errmsg=e.tostring();
return false;
}
ns = tc.getstream();
smtpcodeadd();
//验证网络连接是否正确
if(rightcodeht[recvresponse().substring(0,3)]==null)
{
errmsg="网络连接失败";
return false;
}
string[] sendbuffer;
string sendbufferstr;
//进行smtp验证
if(esmtp)
{
sendbuffer=new string[4];
sendbuffer[0]="ehlo " + mailserver + enter;
sendbuffer[1]="auth login" + enter;
sendbuffer[2]=base64encode(username) + enter;
sendbuffer[3]=base64encode(password) + enter;
if(!dialog(sendbuffer,"smtp服务器验证失败，请核对用户名和密码。"))
return false;
}
else
{
sendbufferstr="helo " + mailserver + enter;
if(!dialog(sendbufferstr,""))
return false;
}
//
sendbufferstr="mail from:<" + from + ">" + enter;
if(!dialog(sendbufferstr,"发件人地址错误，或不能为空"))
return false;
//
sendbuffer=new string[recipientmaxnum];
for(int i=0;i<recipient.count;i++)
{
sendbuffer[i]="rcpt to:<" + recipient[i].tostring() +">" + enter;
}
if(!dialog(sendbuffer,"收件人地址有误"))
return false;
sendbufferstr="data" + enter;
if(!dialog(sendbufferstr,""))
return false;
sendbufferstr="from:" + fromname + "<" + from +">" +enter;
sendbufferstr += "to:=?"+charset.toupper()+"?b?"+base64encode(recipientname)+"?="+"<"+recipient[0]+">"+enter;
sendbufferstr+="cc:";
for(int i=0;i<recipient.count;i++)
{
sendbufferstr+=recipient[i].tostring() + "<" + recipient[i].tostring() +">,";
}
sendbufferstr+=enter;
if(charset=="")
{
sendbufferstr+="subject:" + subject + enter;
}
else
{
sendbufferstr+="subject:" + "=?" + charset.toupper() + "?b?" + base64encode(subject) +"?=" +enter;
}
sendbufferstr+="x-priority:" + priority + enter;
sendbufferstr+="x-msmail-priority:" + priority + enter;
sendbufferstr+="importance:" + priority + enter;
sendbufferstr+="x-mailer: huolx.pubclass" + enter;
sendbufferstr+="mime-version: 1.0" + enter;
sendbufferstr += "content-type: multipart/mixed;"+enter;//内容格式和分隔符
sendbufferstr += " boundary=/"----=_nextpart_000_00d6_01c29593.aab31770/""+enter;
sendbufferstr += "------=_nextpart_000_00d6_01c29593.aab31770"+enter;
if(html)
{
sendbufferstr+="content-type: text/html;" + enter;
}
else
{
sendbufferstr+="content-type: text/plain;" + enter;
}
if(charset=="")
{
sendbufferstr+=" charset=/"iso-8859-1/"" + enter;
}
else
{
sendbufferstr+=" charset=/"" + charset.tolower() + "/"" + enter;
}
//sendbufferstr += "content-transfer-encoding: base64"+enter;
sendbufferstr+="content-transfer-encoding: base64" + enter + enter;
sendbufferstr+= base64encode(body) + enter;
if(attachments.count!=0)
{
foreach(string filepath in attachments)
{
sendbufferstr += "------=_nextpart_000_00d6_01c29593.aab31770"+enter;
sendbufferstr += "content-type: application/octet-stream"+enter;
sendbufferstr += " name=/"=?"+charset.toupper()+"?b?"+base64encode(filepath.substring(filepath.lastindexof("//")+1))+"?=/""+enter;
sendbufferstr += "content-transfer-encoding: base64"+enter;
sendbufferstr += "content-disposition: attachment;"+enter;
sendbufferstr += " filename=/"=?"+charset.toupper()+"?b?"+base64encode(filepath.substring(filepath.lastindexof("//")+1))+"?=/""+enter+enter;
sendbufferstr += getstream(filepath)+enter+enter;
}
}
sendbufferstr += "------=_nextpart_000_00d6_01c29593.aab31770--"+enter+enter;
sendbufferstr += enter + "." + enter;
if(!dialog(sendbufferstr,"错误信件信息"))
return false;
sendbufferstr="quit" + enter;
if(!dialog(sendbufferstr,"断开连接时错误"))
return false;
ns.close();
tc.close();
return true;
}
/// <summary>
/// 发送邮件方法，所有参数均通过属性设置。
/// </summary>
public bool send()
{
if(recipient.count==0)
{
errmsg="收件人列表不能为空";
return false;
}
if(mailserver.trim()=="")
{
errmsg="必须指定smtp服务器";
return false;
}
return sendemail();
}
/// <summary>
/// 发送邮件方法
/// </summary>
/// <param name="smtpserver">smtp服务器信息，如"username:[email protected]:25"，也可去掉部分次要信息，如"www.smtpserver.com"</param>
public bool send(string smtpserver)
{
maildomain=smtpserver;
return send();
}
/// <summary>
/// 发送邮件方法
/// </summary>
/// <param name="smtpserver">smtp服务器信息，如"username:[email protected]:25"，也可去掉部分次要信息，如"www.smtpserver.com"</param>
/// <param name="from">发件人mail地址</param>
/// <param name="fromname">发件人姓名</param>
/// <param name="to">收件人地址</param>
/// <param name="toname">收件人姓名</param>
/// <param name="html">是否html邮件</param>
/// <param name="subject">邮件主题</param>
/// <param name="body">邮件正文</param>
public bool send(string smtpserver,string from,string fromname,string to,string toname,bool html,string subject,string body)
{
maildomain=smtpserver;
from=from;
fromname=fromname;
addrecipient(to);
recipientname=toname;
html=html;
subject=subject;
body=body;
return send();
}
}
}
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