mcs/class/System.Web/System.Web.Mail/SmtpClient.cs

   1 //
   2 // System.Web.Mail.SmtpClient.cs
   3 //
   4 // Author(s):
   5 //   Per Arneng <pt99par@student.bth.se>
   6 //   Sanjay Gupta <gsanjay@novell.com>
   7 //   (C) 2004, Novell, Inc. (http://www.novell.com)
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30 using System;
  31 using System.Net;
  32 using System.IO;
  33 using System.Text;
  34 using System.Collections;
  35 using System.Net.Sockets;
  36
  37 namespace System.Web.Mail {
  38
  39     /// represents a conntection to a smtp server
  40     internal class SmtpClient {
  41
  42         private string server;
  43         private TcpClient tcpConnection;
  44         private SmtpStream smtp;
  45         private Encoding encoding;
  46
  47         //Initialise the variables and connect
  48         public SmtpClient( string server ) {
  49
  50             this.server = server;
  51             encoding = new ASCIIEncoding( );
  52
  53             Connect();
  54         }
  55
  56         // make the actual connection
  57         // and HELO handshaking
  58         private void Connect() {
  59             tcpConnection = new TcpClient( server , 25 );
  60
  61             Stream stream = tcpConnection.GetStream();
  62             smtp = new SmtpStream( stream );
  63
  64             // read the server greeting
  65             smtp.ReadResponse();
  66             smtp.CheckForStatusCode( 220 );
  67
  68             // write the HELO command to the server
  69             smtp.WriteHelo( Dns.GetHostName() );
  70
  71         }
  72
  73         public void Send( MailMessageWrapper msg ) {
  74
  75             if( msg.From == null ) {
  76                 throw new SmtpException( "From property must be set." );
  77             }
  78
  79             if( msg.To == null ) {
  80                 if( msg.To.Count < 1 ) throw new SmtpException( "Atleast one recipient must be set." );
  81             }
  82
  83
  84             // start with a reset incase old data
  85             // is present at the server in this session
  86             smtp.WriteRset();
  87
  88             // write the mail from command
  89             smtp.WriteMailFrom( msg.From.Address );
  90
  91             // write the rcpt to command for the To addresses
  92             foreach( MailAddress addr in msg.To ) {
  93                 smtp.WriteRcptTo( addr.Address );
  94             }
  95
  96             // write the rcpt to command for the Cc addresses
  97             foreach( MailAddress addr in msg.Cc ) {
  98                 smtp.WriteRcptTo( addr.Address );
  99             }
 100
 101             // write the rcpt to command for the Bcc addresses
 102             foreach( MailAddress addr in msg.Bcc ) {
 103                 smtp.WriteRcptTo( addr.Address );
 104             }
 105
 106             // write the data command and then
 107             // send the email
 108             smtp.WriteData();
 109
 110             if( msg.Attachments.Count == 0 ) {
 111 #if NET_2_0
 112                 //The message might be multipart, if RelatedBodyParts are present
 113                 if (msg.RelatedBodyParts.Count != 0)
 114                         SendMultipartMail (msg);
 115                 else
 116 #endif
 117                         SendSinglepartMail( msg );
 118             } else {
 119
 120                 SendMultipartMail( msg );
 121
 122             }
 123
 124             // write the data end tag "."
 125             smtp.WriteDataEndTag();
 126
 127         }
 128
 129         // sends a single part mail to the server
 130         private void SendSinglepartMail( MailMessageWrapper msg ) {
 131
 132             // write the header
 133             smtp.WriteHeader( msg.Header );
 134
 135             // send the mail body
 136             smtp.WriteBytes( msg.BodyEncoding.GetBytes( msg.Body ) );
 137
 138         }
 139
 140         // sends a multipart mail to the server
 141         private void SendMultipartMail( MailMessageWrapper msg ) {
 142
 143             // generate the boundary between attachments
 144             string boundary = MailUtil.GenerateBoundary();
 145
 146             // set the Content-Type header to multipart/mixed
 147             string bodyContentType = msg.Header.ContentType;
 148
 149 #if NET_2_0
 150                 if (msg.RelatedBodyParts.Count != 0)
 151                         msg.Header.ContentType = String.Format( "multipart/related;\r\n   boundary={0}" , boundary );
 152                 else
 153 #endif
 154             msg.Header.ContentType =
 155                 String.Format( "multipart/mixed;\r\n   boundary={0}" , boundary );
 156
 157             // write the header
 158             smtp.WriteHeader( msg.Header );
 159
 160             // write the first part text part
 161             // before the attachments
 162             smtp.WriteBoundary( boundary );
 163
 164             MailHeader partHeader = new MailHeader();
 165             partHeader.ContentType = bodyContentType;
 166
 167 #if NET_1_1
 168                 // Add all the custom headers to body part as specified in
 169                 //Fields property of MailMessageWrapper
 170
 171         //Remove fields specific for authenticating to SMTP server.
 172         //Need to incorporate AUTH command in SmtpStream to handle
 173         //Authorization info. Its a temporary fix for Bug no 68829.
 174         //Will dig some more on SMTP AUTH command, and then implement
 175         //Authorization. - Sanjay
 176
 177         if (msg.Fields.Data ["http://schemas.microsoft.com/cdo/configuration/smtpauthenticate"] != null)
 178             msg.Fields.Data.Remove ("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate");
 179         if (msg.Fields.Data ["http://schemas.microsoft.com/cdo/configuration/sendusername"] != null)
 180             msg.Fields.Data.Remove ("http://schemas.microsoft.com/cdo/configuration/sendusername");
 181         if (msg.Fields.Data ["http://schemas.microsoft.com/cdo/configuration/sendpassword"] != null)
 182             msg.Fields.Data.Remove ("http://schemas.microsoft.com/cdo/configuration/sendpassword");
 183                 partHeader.Data.Add (msg.Fields.Data);
 184 #endif
 185
 186             smtp.WriteHeader( partHeader );
 187
 188             // FIXME: probably need to use QP or Base64 on everything higher
 189             // then 8-bit .. like utf-16
 190             smtp.WriteBytes( msg.BodyEncoding.GetBytes( msg.Body )  );
 191
 192             smtp.WriteBoundary( boundary );
 193
 194 #if NET_2_0
 195                 for (int i = 0; i < msg.RelatedBodyParts.Count; i++) {
 196                         RelatedBodyPart rbp = (RelatedBodyPart) msg.RelatedBodyParts [i];
 197                         FileInfo file = new FileInfo (rbp.Path);
 198                         MailHeader header = new MailHeader ();
 199                         header.ContentLocation = rbp.Path;
 200                         header.ContentType = String.Format (MimeTypes.GetMimeType (file.Name) + "; name=\"{0}\"",file.Name);
 201                         //If content id and ContentLocation both are present
 202                         //in mime header of a mail, than RelatedBodyPart of mail
 203                         //doesnt show up in a machine other than from which mail
 204                         //was sent, and hence only one of them is inserted in
 205                         //header. Need to check how the things go when another
 206                         //body part refers the content with the content id specified
 207                         /*if (rbp.Name != null)
 208                                 header.Data.Add ("Content-ID", "<"+rbp.Name+">");*/
 209
 210                         header.ContentTransferEncoding = "Base64";
 211                         header.ContentDisposition = String.Format( "inline; filename=\"{0}\"" , file.Name );
 212
 213                         smtp.WriteHeader (header);
 214                         FileStream rbpStream = new FileStream (file.FullName, FileMode.Open);
 215                         IAttachmentEncoder rbpEncoder = new Base64AttachmentEncoder ();
 216                         rbpEncoder.EncodeStream (rbpStream, smtp.Stream);
 217                         rbpStream.Close();
 218                         smtp.WriteLine( "" );
 219
 220                         if (i < (msg.RelatedBodyParts.Count - 1)) {
 221                                 smtp.WriteBoundary (boundary);
 222                         } else {
 223                                 if (msg.Attachments.Count == 0)
 224                                          smtp.WriteFinalBoundary (boundary);
 225                                 else
 226                                         smtp.WriteBoundary (boundary);
 227
 228                         }
 229                 }
 230 #endif
 231             // now start to write the attachments
 232
 233             for( int i=0; i< msg.Attachments.Count ; i++ ) {
 234                 MailAttachment a = (MailAttachment)msg.Attachments[ i ];
 235
 236                 FileInfo fileInfo = new FileInfo( a.Filename );
 237
 238                 MailHeader aHeader = new MailHeader();
 239
 240                 aHeader.ContentType =
 241                     String.Format (MimeTypes.GetMimeType (fileInfo.Name) + "; name=\"{0}\"",fileInfo.Name);
 242
 243                 aHeader.ContentDisposition =
 244                     String.Format( "attachment; filename=\"{0}\"" , fileInfo.Name );
 245
 246                 aHeader.ContentTransferEncoding = a.Encoding.ToString();
 247
 248                 smtp.WriteHeader( aHeader );
 249
 250                 // perform the actual writing of the file.
 251                 // read from the file stream and write to the tcp stream
 252                 FileStream ins = new FileStream( fileInfo.FullName  , FileMode.Open );
 253
 254                 // create an apropriate encoder
 255                 IAttachmentEncoder encoder;
 256                 if( a.Encoding == MailEncoding.UUEncode ) {
 257                     encoder = new UUAttachmentEncoder( 644 , fileInfo.Name  );
 258                 } else {
 259                     encoder = new Base64AttachmentEncoder();
 260                 }
 261
 262                 encoder.EncodeStream( ins , smtp.Stream );
 263
 264                 ins.Close();
 265
 266
 267                 smtp.WriteLine( "" );
 268
 269                 // if it is the last attachment write
 270                 // the final boundary otherwise write
 271                 // a normal one.
 272                 if( i < (msg.Attachments.Count - 1) ) {
 273                     smtp.WriteBoundary( boundary );
 274                 } else {
 275                     smtp.WriteFinalBoundary( boundary );
 276                 }
 277
 278             }
 279
 280         }
 281
 282         // send quit command and
 283         // closes the connection
 284         public void Close() {
 285
 286             smtp.WriteQuit();
 287             tcpConnection.Close();
 288
 289         }
 290
 291
 292     }
 293
 294 }