SmtpSock.pas

unit SmtpSock;

{
  CrtSocket for Delphi 32
  Copyright (C) 1999-2001  Paul Toth <tothpaul@free.fr>
  http://tothpaul.free.fr

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

}

interface

Uses
 CrtSock,Classes;

Function SmtpOpen(Server:string):integer;
Function SmtpError:string;
Procedure SmtpClose;
Function SmtpFrom(Email:string):boolean;
Function SmtpTo(Email:string):boolean;

Function SmtpHead(From,Rcpt,Subject:string):boolean;
Function SmtpSend(From,Rcpt,Subject:string; Msg:TStrings):boolean;
procedure SmtpJoin(Name:string; Stream:TStream; Count:integer);
Function SmtpDone:boolean;

implementation

var
 sin,sout:TextFile;
 last:string;

Function ReadString:string;
 begin
  repeat
   readln(sin,Result);
//   writeln(result);
  until (Length(Result)<4)or(Result[4]<>'-');
  last:=Result;
 end;

Procedure WriteString(s:string);
 begin
//  writeln('>>>',s);
  WriteLn(sout,s);
 end;

Function Status:char;
 var
  s:string;
 begin
  s:=ReadString;
  if s='' then Status:='?' else Status:=s[1];
 end;

Function Exec(cmd:string):char;
 begin
  Writestring(cmd);
  Result:=Status;
 end;

Function SmtpOpen(Server:string):integer;
 begin
  Last:='Server not found';
  Result:=CallServer(Server,25);
  if Result>0 then begin
   AssignCrtSock(Result,sin,sout);
   if Status='2' then begin
    if Exec('HELO MySoft.Delphi')='2' then exit;
    Disconnect(Result);
    Result:=-3;
   end else begin
    Disconnect(Result);
    Result:=-2;
   end;
  end;
 end;

Function SmtpError:string;
 begin
  Result:=Last;
 end;

Procedure SmtpClose;
 begin
  CloseFile(sout);
 end;

Function SmtpFrom(Email:string):boolean;
 begin
  Result:=(Exec('MAIL '+'From: '+EMail)='2');
 end;

Function SmtpTo(EMail:string):boolean;
 begin
  Result:=(Exec('RCPT To:'+Email)='2');
 end;

Function SmtpHead(From,Rcpt,Subject:string):boolean;
 begin
  Result:=False;
  if Exec('DATA')<>'3' then exit;
  WriteString('From: '+From);
  WriteString('To: '+Rcpt);
  WriteString('Subject: '+Subject);
  WriteString('Content-Type: text/plain; charset=ISO-8859-1');
  WriteString('Content-Transfer-Encoding: 8bit'#13#10);
  WriteString('');
  Result:=True;
 end;

Function SmtpSend(From,Rcpt,Subject:string; Msg:TStrings):boolean;
 begin
  Result:=False;
  if not SmtpHead(From,Rcpt,Subject) then exit;
  WriteString(Msg.Text);
  Result:=SmtpDone;
 end;

function uchr(b:byte):char;
 begin
  if b=0 then result:=#96 else result:=chr(b+32);
 end;

procedure SmtpJoin(Name:string; Stream:TStream; Count:integer);
 var
  s:string[76];
  size:integer;
  u:string;
  ss:integer;
  c1,c2:byte;
  x:integer;
 begin
  WriteString('begin 600 '+Name);
  size:=45;
  while Count>0 do begin
   if size>Count then size:=count;
   dec(count,size);
   Stream.Read(s[1],size);
   u:=uchr(size);
   ss:=2;
   c2:=0;
   for x:=1 to size do begin
    c1:=ord(s[x]);
    u:=u+uchr(c2 or (c1 shr ss));
    c2:=(c1 shl (6-ss)) and 63;
    ss:=(ss+2) and 7;
    if ss=0 then begin
     ss:=2;
     u:=u+uchr(c2);
     c2:=0;
    end;
   end;
   if (ss>2) then begin
    u:=u+uchr(c2)+#96;
    if ss=4 then u:=u+#96;
   end;
   WriteString(u);
  end;
  writeString('end');
 end;

Function SmtpDone:boolean;
 begin
  Result:=(Exec('.')='2');
  CloseFile(sout);
 end;

end.