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Send e-mails via WinSock API ?(2007-11-20 21:38:41)
  分类：Delphi


Author: Melih SARICA 

 

unit SMTP_Connections;
// *********************************************************************
//     Unit Name          : SMTP_Connections                           *
//     Author             : Melih SARICA (Non ZERO)                    *
//     Date               : 01/17/2004                                 *
//**********************************************************************

interface

uses
  Classes, StdCtrls;

const
  WinSock = 'wsock32.dll';
  Internet = 2;
  Stream  = 1;
  fIoNbRead = $4004667F;
  WinSMTP = $0001;
  LinuxSMTP = $0002;

type

  TWSAData = packed record
    wVersion: Word;
    wHighVersion: Word;
    szDescription: array[0..256] of Char;
    szSystemStatus: array[0..128] of Char;
    iMaxSockets: Word;
    iMaxUdpDg: Word;
    lpVendorInfo: PChar;
  end;
  PHost = ^THost;
  THost = packed record
    Name: PChar;
    aliases: ^PChar;
    addrtype: Smallint;
    Length: Smallint;
    addr: ^Pointer;
  end;

  TSockAddr = packed record
    Family: Word;
    Port: Word;
    Addr: Longint;
    Zeros: array[0..7] of Byte;
  end;


function WSAStartup(Version:word; Var Data:TwsaData):integer; stdcall; far; external winsock;
function socket(Family,Kind,Protocol:integer):integer; stdcall; far; external winsock;
function shutdown(Socket,How:Integer):integer; stdcall; far; external winsock;
function closesocket(socket:Integer):integer; stdcall; far; external winsock;
function WSACleanup:integer; stdcall; far; external winsock;
function bind(Socket:Integer; Var SockAddr:TSockAddr; AddrLen:integer):integer; stdcall; far; external winsock;
function listen(socket,flags:Integer):integer; stdcall; far; external winsock;
function connect(socket:Integer; Var SockAddr:TSockAddr; AddrLen:integer):integer; stdcall; far; external winsock;
function accept(socket:Integer; Var SockAddr:TSockAddr; Var AddrLen:Integer):integer; stdcall; far; external winsock;
function WSAGetLastError:integer; stdcall; far; external winsock;
function recv(socket:integer; data:pchar; datalen,flags:integer):integer; stdcall; far; external winsock;
function send(socket:integer; var data; datalen,flags:integer):integer; stdcall; far; external winsock;
function gethostbyname(HostName:PChar):PHost; stdcall; far; external winsock;
function WSAIsBlocking:boolean; stdcall; far; external winsock;
function WSACancelBlockingCall:integer; stdcall; far; external winsock;
function ioctlsocket(socket:integer; cmd: Longint; var arg: longint): Integer; stdcall; far; external winsock;
function gethostname(name:pchar; size:integer):integer; stdcall; far; external winsock;

procedure _authSendMail(MailServer,uname,upass,mFrom,mFromName,mToName,Subject:string;mto,mbody:TStringList);
function ConnectServer(mhost:string;mport:integer):integer;
function ConnectServerwin(mhost:string;mport:integer):integer;
function DisConnectServer:integer;
function Stat: string;
function SendCommand(Command: String): string;
function SendData(Command: String): string;
function SendCommandWin(Command: String): string;
function ReadCommand: string;
function encryptB64(s:string):string;


var
  mconnHandle: Integer;
  mFin, mFOut: Textfile;
  EofSock: Boolean;
  mactive: Boolean;
  mSMTPErrCode: Integer;
  mSMTPErrText: string;
  mMemo: TMemo;

implementation

uses
  SysUtils, Sockets, IdBaseComponent,
  IdCoder, IdCoder3to4, IdCoderMIME, IniFiles,Unit1;

var
  mClient: TTcpClient;

procedure _authSendMail(MailServer, uname, upass, mFrom, mFromName,
  mToName, Subject: string; mto, mbody: TStringList);
var
  tmpstr: string;
  cnt: Integer;
  mstrlist: TStrings;
  RecipientCount: Integer;
begin
  if ConnectServerWin(Mailserver, 25) = 250 then
  begin
    Sendcommandwin('AUTH LOGIN ');
    SendcommandWin(encryptB64(uname));
    SendcommandWin(encryptB64(upass));
    SendcommandWin('MAIL FROM: ' + mfrom);
    for cnt := 0 to mto.Count - 1 do
      SendcommandWin('RCPT TO: ' + mto[cnt]);
    Sendcommandwin('DATA');
    SendData('Subject: ' + Subject);
    SendData('From: "' + mFromName + '" <' + mfrom + '>');
    SendData('To: ' + mToName);
    SendData('Mime-Version: 1.0');
    SendData('Content-Type: multipart/related; boundary="Esales-Order";');
    SendData('     type="text/html"');
    SendData('');
    SendData('--Esales-Order');
    SendData('Content-Type: text/html;');
    SendData('        charset="iso-8859-9"');
    SendData('Content-Transfer-Encoding: QUOTED-PRINTABLE');
    SendData('');
    for cnt := 0 to mbody.Count - 1 do
      SendData(mbody[cnt]);
    Senddata('');
    SendData('--Esales-Order--');
    Senddata(' ');
    mSMTPErrText := SendCommand(crlf + '.' + crlf);
    try
      mSMTPErrCode := StrToInt(Copy(mSMTPErrText, 1, 3));
    except
    end;
    SendData('QUIT');
    DisConnectServer;
  end;
end;


function Stat: string;
var
  s: string;
begin
  s := ReadCommand;
  Result := s;
end;

function EchoCommand(Command: string): string;
begin
  SendCommand(Command);
  Result := ReadCommand;
end;

function ReadCommand: string;
var
  tmp: string;
begin
  repeat
    ReadLn(mfin, tmp);
    if Assigned(mmemo) then
      mmemo.Lines.Add(tmp);
  until (Length(tmp) < 4) or (tmp[4] <> '-');
  Result := tmp
end;

function SendData(Command: string): string;
begin
  Writeln(mfout, Command);
end;

function SendCommand(Command: string): string;
begin
  Writeln(mfout, Command);
  Result := stat;
end;

function SendCommandWin(Command: string): string;
begin
  Writeln(mfout, Command + #13);
  Result := stat;
end;

function FillBlank(Source: string; number: Integer): string;
var
  a: Integer;
begin
  Result := '';
  for a := Length(trim(Source)) to number do
    Result := Result + ' ';
end;

function IpToLong(ip: string): Longint;
var
  x, i: Byte;
  ipx: array[0..3] of Byte;
  v: Integer;
begin
  Result := 0;
  Longint(ipx) := 0;
  i := 0;
  for x := 1 to Length(ip) do
    if ip[x] = '.' then
    begin
      Inc(i);
      if i = 4 then Exit;
    end
  else
  begin
    if not (ip[x] in ['0'..'9']) then Exit;
    v := ipx[i] * 10 + Ord(ip[x]) - Ord('0');
    if v > 255 then Exit;
    ipx[i] := v;
  end;
  Result := Longint(ipx);
end;

function HostToLong(AHost: string): Longint;
var
  Host: PHost;
begin
  Result := IpToLong(AHost);
  if Result = 0 then
  begin
    Host := GetHostByName(PChar(AHost));
    if Host <> nil then Result := Longint(Host^.Addr^^);
  end;
end;

function LongToIp(Long: Longint): string;
var
  ipx: array[0..3] of Byte;
  i: Byte;
begin
  Longint(ipx) := long;
  Result       := '';
  for i := 0 to 3 do Result := Result + IntToStr(ipx[i]) + '.';
  SetLength(Result, Length(Result) - 1);
end;

procedure Disconnect(Socket: Integer);
begin
  ShutDown(Socket, 1);
  CloseSocket(Socket);
end;

function CallServer(Server: string; Port: Word): Integer;
var
  SockAddr: TSockAddr;
begin
  Result := socket(Internet, Stream, 0);
  if Result = -1 then Exit;
  FillChar(SockAddr, SizeOf(SockAddr), 0);
  SockAddr.Family := Internet;
  SockAddr.Port := swap(Port);
  SockAddr.Addr := HostToLong(Server);
  if Connect(Result, SockAddr, SizeOf(SockAddr)) <> 0 then
  begin
    Disconnect(Result);
    Result := -1;
  end;
end;

function OutputSock(var F: TTextRec): Integer; far;
begin
  if F.BufPos <> 0 then
  begin
    Send(F.Handle, F.BufPtr^, F.BufPos, 0);
    F.BufPos := 0;
  end;
  Result := 0;
end;

function InputSock(var F: TTextRec): Integer; far;
var
  Size: Longint;
begin
  F.BufEnd := 0;
  F.BufPos := 0;
  Result := 0;
  repeat
    if (IoctlSocket(F.Handle, fIoNbRead, Size) < 0) then
    begin
      EofSock := True;
      Exit;
    end;
  until (Size >= 0);
  F.BufEnd := Recv(F.Handle, F.BufPtr, F.BufSize, 0);
  EofSock  := (F.Bufend = 0);
end;


function CloseSock(var F: TTextRec): Integer; far;
begin
  Disconnect(F.Handle);
  F.Handle := -1;
  Result   := 0;
end;

function OpenSock(var F: TTextRec): Integer; far;
begin
  if F.Mode = fmInput then
  begin
    EofSock := False;
    F.BufPos := 0;
    F.BufEnd := 0;
    F.InOutFunc := @InputSock;
    F.FlushFunc := nil;
  end
  else
  begin
    F.Mode := fmOutput;
    F.InOutFunc := @OutputSock;
    F.FlushFunc := @OutputSock;
  end;
  F.CloseFunc := @CloseSock;
  Result := 0;
end;

procedure AssignCrtSock(Socket:integer; Var Input,Output:TextFile);
 begin
  with TTextRec(Input) do
  begin
    Handle := Socket;
    Mode := fmClosed;
    BufSize := SizeOf(Buffer);
    BufPtr := @Buffer;
    OpenFunc := @OpenSock;
  end;
  with TTextRec(Output) do
  begin
    Handle := Socket;
    Mode := fmClosed;
    BufSize := SizeOf(Buffer);
    BufPtr := @Buffer;
    OpenFunc := @OpenSock;
  end;
  Reset(Input);
  Rewrite(Output);
 end;

function ConnectServer(mhost: string; mport: Integer): Integer;
var
  tmp: string;
begin
  mClient := TTcpClient.Create(nil);
  mClient.RemoteHost := mhost;
  mClient.RemotePort := IntToStr(mport);
  mClient.Connect;
  mconnhandle := callserver(mhost, mport);
  if (mconnHandle<>-1) then
  begin
    AssignCrtSock(mconnHandle, mFin, MFout);
    tmp := stat;
    tmp := SendCommand('HELO bellona.com.tr');
    if Copy(tmp, 1, 3) = '250' then
    begin
      Result := StrToInt(Copy(tmp, 1, 3));
    end;
  end;
end;

function ConnectServerWin(mhost: string; mport: Integer): Integer;
var
  tmp: string;
begin
  mClient := TTcpClient.Create(nil);
  mClient.RemoteHost := mhost;
  mClient.RemotePort := IntToStr(mport);
  mClient.Connect;
  mconnhandle := callserver(mhost, mport);
  if (mconnHandle<>-1) then
  begin
    AssignCrtSock(mconnHandle, mFin, MFout);
    tmp := stat;
    tmp := SendCommandWin('HELO bellona.com.tr');
    if Copy(tmp, 1, 3) = '250' then
    begin
      Result := StrToInt(Copy(tmp, 1, 3));
    end;
  end;
end;

function DisConnectServer: Integer;
begin
  closesocket(mconnhandle);
  mClient.Disconnect;
  mclient.Free;
end;

function encryptB64(s: string): string;
var
  hash1: TIdEncoderMIME;
  p: string;
begin
  if s <> '' then
  begin
    hash1 := TIdEncoderMIME.Create(nil);
    p := hash1.Encode(s);
    hash1.Free;
  end;
  Result := p;
end;

end.

{***************************************************}
{ How to use it / Wie verwende ich die Unit?}
{***************************************************}

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

uses
  SMTP_Connections;

procedure TForm1.Button1Click(Sender: TObject);
var
  mto, mbody: TStringList;
  MailServer, uname, upass, mFrom, mFromName,
  mToName, Subject: string;
begin
  mMemo := Memo1; // to output server feedback
  //..........................
  MailServer := 'mail.xyz.net';
  uname := 'username';
  upass := 'password';
  mFrom :=  'user@xyz.net';
  mFromName := 'forename surname';
  mToName := '';
  Subject := 'Your Subject';
  //..........................
  mto := TStringList.Create;
  mbody := TStringList.Create;
  try
    mto.Add('anybody@xyz.net');
    mbody.Add('Test Mail');
    //Send Mail.................
    _authSendMail(MailServer, uname, upass, mFrom, mFromName, mToName, Subject, mto, mbody);
    //..........................
  finally
    mto.Free;
    mbody.Free;
  end;
end;

end.

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