【下载文档: C#通过POP3获取邮件的代码(正文和附件).txt 】
C#通过POP3获取邮件的代码(正文和附件)
使用方法: 获取第1封邮件 复制代码 代码如下: Zgke.Net.POP3 _Popt = new Zgke.Net.POP3("192.168.0.1", 110); DataTable _Mail = _Popt.GetMail("zk", "zk", 1); 返回DataTable 数据内容为 Type为类型 Text为文字 如果是附件 为byte[] Name 如果是附件里存放的为文件名 下面是全部的类复制代码 代码如下:using System; using System.Net.Sockets; using System.Net; using System.Security.Cryptography; using System.IO; using System.Data; namespace Zgke.Net { ///
/// 获取邮件的类 /// zgke@sina.com /// qq:116149 /// public class POP3 { private string m_Address = "127.0.0.1"; private int m_Port = 110; public POP3(string p_Address, int p_Port) { m_Address = p_Address; m_Port = p_Port; } ///
/// 获取Mail列表 /// ///
用户名 ///
密码 ///
Mail信息 public DataTable GetMailTable(string p_Name,string p_PassWord) { POP3Client _Client = new POP3Client(); _Client.UserName = p_Name; _Client.PassWord = p_PassWord; _Client.Client = new TcpClient(); _Client.Client.BeginConnect(m_Address, m_Port, new AsyncCallback(OnConnectRequest), _Client); while (!_Client.ReturnEnd) { System.Windows.Forms.Application.DoEvents(); } if (_Client.Error.Length != 0) throw new Exception("错误信息!" + _Client.Error); return _Client.MailDataTable; } ///
/// 获取邮件内容 /// ///
名称 ///
密码 ///
邮件编号 ///
数据集 public DataTable GetMail(string p_Name, string p_PassWord, int p_MailIndex) { POP3Client _Client = new POP3Client(); _Client.UserName = p_Name; _Client.PassWord = p_PassWord; _Client.Client = new TcpClient(); _Client.ReadIndex = p_MailIndex; _Client.Client.BeginConnect(m_Address, m_Port, new AsyncCallback(OnConnectRequest), _Client); while (!_Client.ReturnEnd) { System.Windows.Forms.Application.DoEvents(); } if (_Client.Error.Length != 0) throw new Exception("错误信息!" + _Client.Error); return _Client.MailTable; } private class POP3Client { public TcpClient Client; public string UserName = ""; public string PassWord = ""; public bool ReturnEnd = false; public DataTable MailDataTable = new DataTable(); public DataTable MailTable = new DataTable(); public string Error = ""; public bool ReadEnd = false; public int ReadIndex = -1; public POP3Client() { MailDataTable.Columns.Add("NUM"); MailDataTable.Columns.Add("Size"); MailDataTable.Columns.Add("Form"); MailDataTable.Columns.Add("To"); MailDataTable.Columns.Add("Subject"); MailDataTable.Columns.Add("Date"); MailTable.Columns.Add("Type",typeof(string)); MailTable.Columns.Add("Text",typeof(object)); MailTable.Columns.Add("Name", typeof(string)); } private int m_SendMessage = 0; private int m_TOPIndex = 1; ///
/// 获取下一个登陆到获取列表需要的命令 /// ///
///
public byte[] GetSendBytes(byte[] p_Value) { ReadEnd = false; string _Value = System.Text.Encoding.Default.GetString(p_Value).Replace("\0", ""); if (_Value.IndexOf("+OK") == 0) { m_SendMessage++; switch (m_SendMessage) { case 1: return System.Text.Encoding.ASCII.GetBytes("USER " + UserName + "\r\n"); case 2: return System.Text.Encoding.ASCII.GetBytes("PASS " + PassWord + "\r\n"); case 3: ReadEnd = true; if (ReadIndex != -1) { m_SendMessage = 5; return System.Text.Encoding.ASCII.GetBytes("RETR " + ReadIndex.ToString() + "\r\n"); } else { return System.Text.Encoding.ASCII.GetBytes("LIST\r\n"); } case 4: string[] _List = _Value.Split(new char[] { '\r', '\n', '.' }, StringSplitOptions.RemoveEmptyEntries); for (int i = 1; i != _List.Length; i++) { string[] _MaliSize = _List[i].Split(' '); MailDataTable.Rows.Add(new object[] { _MaliSize[0], _MaliSize[1] }); } if (MailDataTable.Rows.Count == 0) { ReturnEnd = true; return new byte[0]; } else { ReadEnd = true; m_TOPIndex = 1; return System.Text.Encoding.ASCII.GetBytes("TOP 1\r\n"); } case 5: System.Text.RegularExpressions.Regex _Regex = new System.Text.RegularExpressions.Regex(@"(?<=Date: ).*?(\r\n)+"); System.Text.RegularExpressions.MatchCollection _Collection = _Regex.Matches(_Value); if (_Collection.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["Date"] = GetReadText(_Collection[0].Value); System.Text.RegularExpressions.Regex _RegexFrom = new System.Text.RegularExpressions.Regex(@"(?<=From: ).*?(\r\n)+"); System.Text.RegularExpressions.MatchCollection _CollectionForm = _RegexFrom.Matches(_Value); if (_CollectionForm.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["Form"] = GetReadText(_CollectionForm[0].Value); System.Text.RegularExpressions.Regex _RegexTo = new System.Text.RegularExpressions.Regex(@"(?<=To: ).*?(\r\n)+"); System.Text.RegularExpressions.MatchCollection _CollectionTo = _RegexTo.Matches(_Value); if (_CollectionTo.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["To"] = GetReadText(_CollectionTo[0].Value); System.Text.RegularExpressions.Regex _RegexSubject = new System.Text.RegularExpressions.Regex(@"(?<=Subject: ).*?(\r\n)+"); System.Text.RegularExpressions.MatchCollection _CollectionSubject = _RegexSubject.Matches(_Value); if (_CollectionSubject.Count != 0) MailDataTable.Rows[m_TOPIndex - 1]["Subject"] = GetReadText(_CollectionSubject[0].Value); m_TOPIndex++; m_SendMessage--; ReadEnd = true; if (m_TOPIndex > MailDataTable.Rows.Count) { ReturnEnd = true; return System.Text.Encoding.ASCII.GetBytes("QUIT"); } else { return System.Text.Encoding.ASCII.GetBytes("TOP " + m_TOPIndex.ToString() + "\r\n"); } case 6: GetMailText(_Value); ReturnEnd = true; return System.Text.Encoding.ASCII.GetBytes("QUIT"); } } Error = _Value; ReturnEnd = true; return new byte[0]; } ///
/// 转换文字里的字符集 /// ///
///
public string GetReadText(string p_Text) { System.Text.RegularExpressions.Regex _Regex = new System.Text.RegularExpressions.Regex(@"(?<=\=\?).*?(\?\=)+"); System.Text.RegularExpressions.MatchCollection _Collection = _Regex.Matches(p_Text); string _Text = p_Text; foreach (System.Text.RegularExpressions.Match _Match in _Collection) { string _Value = "=?" + _Match.Value; if (_Value[0] == '=') { string[] _BaseData = _Value.Split('?'); if (_BaseData.Length == 5) { System.Text.Encoding _Coding = System.Text.Encoding.GetEncoding(_BaseData[1]); _Text = _Text.Replace(_Value, _Coding.GetString(Convert.FromBase64String(_BaseData[3]))); } } else { } } return _Text; } #region 获取邮件正文 和 附件 ///
/// 获取文字主体 /// ///
///
public void GetMailText(string p_Mail) { string _ConvertType = GetTextType(p_Mail, "\r\nContent-Type: ", ";"); if (_ConvertType.Length == 0) { _ConvertType = GetTextType(p_Mail, "\r\nContent-Type: ", "\r"); } int _StarIndex = -1; int _EndIndex = -1; string _ReturnText = ""; string _Transfer = ""; string _Boundary = ""; string _EncodingName = GetTextType(p_Mail, "charset=\"", "\"").Replace("\"", ""); System.Text.Encoding _Encoding = System.Text.Encoding.Default; if(_EncodingName!="")_Encoding = System.Text.Encoding.GetEncoding(_EncodingName); switch (_ConvertType) { case "text/html;": _Transfer = GetTextType(p_Mail, "\r\nContent-Transfer-Encoding: ", "\r\n").Trim(); _StarIndex = p_Mail.IndexOf("\r\n\r\n"); if (_StarIndex != -1) _ReturnText = p_Mail.Substring(_StarIndex, p_Mail.Length - _StarIndex); switch (_Transfer) { case "8bit": break; case "quoted-printable": _ReturnText = DecodeQuotedPrintable(_ReturnText, _Encoding); break; case "base64": _ReturnText = DecodeBase64(_ReturnText, _Encoding); break; } MailTable.Rows.Add(new object[] { "text/html", _ReturnText }); break; case "text/plain;": _Transfer = GetTextType(p_Mail, "\r\nContent-Transfer-Encoding: ", "\r\n").Trim(); _StarIndex = p_Mail.IndexOf("\r\n\r\n"); if (_StarIndex != -1) _ReturnText = p_Mail.Substring(_StarIndex, p_Mail.Length - _StarIndex); switch (_Transfer) { case "8bit": break; case "quoted-printable": _ReturnText = DecodeQuotedPrintable(_ReturnText, _Encoding); break; case "base64": _ReturnText = DecodeBase64(_ReturnText, _Encoding); break; } MailTable.Rows.Add(new object[] { "text/plain", _ReturnText }); break; case "multipart/alternative;": _Boundary = GetTextType(p_Mail, "boundary=\"", "\"").Replace("\"", ""); _StarIndex = p_Mail.IndexOf("--" + _Boundary + "\r\n"); if (_StarIndex == -1) return; while (true) { _EndIndex = p_Mail.IndexOf("--" + _Boundary, _StarIndex + _Boundary.Length); if (_EndIndex == -1) break; GetMailText(p_Mail.Substring(_StarIndex, _EndIndex - _StarIndex)); _StarIndex = _EndIndex; } break; case "multipart/mixed;": _Boundary = GetTextType(p_Mail, "boundary=\"", "\"").Replace("\"", ""); _StarIndex = p_Mail.IndexOf("--" + _Boundary + "\r\n"); if (_StarIndex == -1) return; while (true) { _EndIndex = p_Mail.IndexOf("--" + _Boundary, _StarIndex + _Boundary.Length); if (_EndIndex == -1) break; GetMailText(p_Mail.Substring(_StarIndex, _EndIndex - _StarIndex)); _StarIndex = _EndIndex; } break; default: if (_ConvertType.IndexOf("application/") == 0) { _StarIndex = p_Mail.IndexOf("\r\n\r\n"); if (_StarIndex != -1) _ReturnText = p_Mail.Substring(_StarIndex, p_Mail.Length - _StarIndex); _Transfer = GetTextType(p_Mail, "\r\nContent-Transfer-Encoding: ", "\r\n").Trim(); string _Name = GetTextType(p_Mail, "filename=\"", "\"").Replace("\"", ""); _Name = GetReadText(_Name); byte[] _FileBytes = new byte[0]; switch (_Transfer) { case "base64": _FileBytes = Convert.FromBase64String(_ReturnText); break; } MailTable.Rows.Add(new object[] { "application/octet-stream", _FileBytes, _Name }); } break; } } ///
/// 获取类型（正则） /// ///
原始文字 ///
前文字 ///
结束文字 ///
符合的记录 public string GetTextType(string p_Mail, string p_TypeText, string p_End) { System.Text.RegularExpressions.Regex _Regex = new System.Text.RegularExpressions.Regex(@"(?<=" + p_TypeText + ").*?(" + p_End + ")+"); System.Text.RegularExpressions.MatchCollection _Collection = _Regex.Matches(p_Mail); if (_Collection.Count == 0) return ""; return _Collection[0].Value; } ///
/// QuotedPrintable编码接码 /// ///
原始文字 ///
编码方式 ///
接码后信息 public string DecodeQuotedPrintable(string p_Text, System.Text.Encoding p_Encoding) { System.IO.MemoryStream _Stream = new System.IO.MemoryStream(); char[] _CharValue = p_Text.ToCharArray(); for (int i = 0; i != _CharValue.Length; i++) { switch (_CharValue[i]) { case '=': if (_CharValue[i + 1] == '\r' || _CharValue[i + 1] == '\n') { i += 2; } else { try { _Stream.WriteByte(Convert.ToByte(_CharValue[i + 1].ToString() + _CharValue[i + 2].ToString(), 16)); i += 2; } catch { _Stream.WriteByte(Convert.ToByte(_CharValue[i])); } } break; default: _Stream.WriteByte(Convert.ToByte(_CharValue[i])); break; } } return p_Encoding.GetString(_Stream.ToArray()); } ///
/// 解码BASE64 /// ///
///
///
public string DecodeBase64(string p_Text, System.Text.Encoding p_Encoding) { if (p_Text.Trim().Length == 0) return ""; byte[] _ValueBytes = Convert.FromBase64String(p_Text); return p_Encoding.GetString(_ValueBytes); } #endregion } ///
/// 连接事件 /// ///
private void OnConnectRequest(IAsyncResult ar) { POP3Client _Client = (POP3Client)ar.AsyncState; byte[] _ReadBytes =new byte[0]; _Client.Client.Client.BeginReceive(_ReadBytes, 0, 0, SocketFlags.None, new AsyncCallback(OnWrite), _Client); } ///
/// 连接事件 /// ///
private void OnSend(IAsyncResult ar) { POP3Client _Client = (POP3Client)ar.AsyncState; byte[] _ReadBytes = new byte[0]; _Client.Client.Client.BeginReceive(_ReadBytes, 0, 0, SocketFlags.None, new AsyncCallback(OnWrite), _Client); } ///
/// 连接事件 /// ///
private void OnWrite(IAsyncResult ar) { POP3Client _Client = (POP3Client)ar.AsyncState; byte[] _WriteBytes = new byte[_Client.Client.Client.ReceiveBufferSize]; _Client.Client.Client.Receive(_WriteBytes); if (_Client.ReadEnd) _WriteBytes = ReadEnd(_WriteBytes, _Client); byte[] _SendBytes = _Client.GetSendBytes(_WriteBytes); if (_SendBytes.Length == 0) return; _Client.Client.Client.BeginSend(_SendBytes, 0, _SendBytes.Length, SocketFlags.None, new AsyncCallback(OnSend), _Client); } ///
/// 获取知道获取到. 否则一直获取数据 /// ///
///
private byte[] ReadEnd(byte[] p_Value,POP3Client p_Client) { if (System.Text.Encoding.ASCII.GetString(p_Value).IndexOf("\r\n.\r\n") != -1) return p_Value; MemoryStream _Stream = new MemoryStream(); _Stream.Write(p_Value, 0, p_Value.Length); while (true) { byte[] _WriteBytes = new byte[p_Client.Client.ReceiveBufferSize]; p_Client.Client.Client.Receive(_WriteBytes); _Stream.Write(_WriteBytes, 0, _WriteBytes.Length); System.Threading.Thread.Sleep(100); if (System.Text.Encoding.ASCII.GetString(_WriteBytes).IndexOf("\r\n.\r\n") != -1) return _Stream.ToArray(); } } } }
