Indy/Lib/Protocols/IdMappedPOP3.pas

{
  $Project$
  $Workfile$
  $Revision$
  $DateUTC$
  $Id$

  This file is part of the Indy (Internet Direct) project, and is offered
  under the dual-licensing agreement described on the Indy website.
  (http://www.indyproject.org/)

  Copyright:
   (c) 1993-2005, Chad Z. Hower and the Indy Pit Crew. All rights reserved.
}
{
  $Log$
}
{
  Rev 1.6    2/8/05 5:58:32 PM  RLebeau
  Updated InitComponent() to call TIdReply.SetReply() instead of setting the
  Code and Text properties individually

  Rev 1.5    11/15/04 11:31:20 AM  RLebeau
  Bug fix for OutboundConnect() assigning the IOHandler.ConnectTimeout property
  before the IOHandler has been assigned.

  Rev 1.4    11/14/04 11:39:24 AM  RLebeau
  Updated OutboundConnect() to send the Greeting

  Rev 1.3    5/18/04 1:02:02 PM  RLebeau
  Removed GetReplyClass() and GetRepliesClass() overrides.

  Rev 1.2    5/16/04 5:28:40 PM  RLebeau
  Added GetReplyClass() and GetRepliesClass() overrides.

  Rev 1.1    2004.02.03 5:45:52 PM  czhower
  Name changes

  Rev 1.0    2/2/2004 4:11:36 PM  JPMugaas
  Recased to be consistant with IdPOP3 and IdPOP3Server.  I also fixed several
  bugs that could cause AV's.

  Rev 1.0    2/1/2004 4:22:48 AM  JPMugaas
  Components from IdMappedPort are now in their own units.
}

unit IdMappedPOP3;

interface

{$i IdCompilerDefines.inc}

uses
  {$IFDEF WORKAROUND_INLINE_CONSTRUCTORS}
  Classes,
  {$ENDIF}
  IdAssignedNumbers,
  IdMappedPortTCP, IdMappedTelnet, IdReplyPOP3;

type
  TIdMappedPOP3Context = class (TIdMappedTelnetContext)
  protected
    FErrorMsg: String;
    FGreeting: String;
    FUserName: String;
    procedure OutboundConnect; override;
  public
    property ErrorMsg: String read FErrorMsg;
    property Greeting: String read FGreeting;
    property UserName: String read FUsername write FUserName;
  end;

  TIdMappedPOP3 = class (TIdMappedTelnet)
  protected
    FReplyUnknownCommand: TIdReplyPOP3;
    FGreeting: TIdReplyPOP3;
    FUserHostDelimiter: String;
    procedure InitComponent; override;
    procedure SetGreeting(AValue: TIdReplyPOP3);
    procedure SetReplyUnknownCommand(const AValue: TIdReplyPOP3);
  public
    {$IFDEF WORKAROUND_INLINE_CONSTRUCTORS}
    constructor Create(AOwner: TComponent); reintroduce; overload;
    {$ENDIF}
    destructor Destroy; override;
  published
    property Greeting : TIdReplyPOP3 read FGreeting write SetGreeting;
    property ReplyUnknownCommand: TIdReplyPOP3 read FReplyUnknownCommand
     write SetReplyUnknownCommand;
    property DefaultPort default IdPORT_POP3;
    property MappedPort default IdPORT_POP3;
    property UserHostDelimiter: String read FUserHostDelimiter write FUserHostDelimiter;
  end;

implementation

uses
  IdGlobal, IdException, IdResourceStringsProtocols,
  IdTCPClient, IdTCPConnection, SysUtils;

{ TIdMappedPOP3 }

{$IFDEF WORKAROUND_INLINE_CONSTRUCTORS}
constructor TIdMappedPOP3.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
end;
{$ENDIF}

destructor TIdMappedPOP3.Destroy;
begin
  FreeAndNil(FReplyUnknownCommand);
  FreeAndNil(FGreeting);
  inherited Destroy;
end;

procedure TIdMappedPOP3.InitComponent;
Begin
  inherited InitComponent;

  FUserHostDelimiter := '#';//standard    {Do not Localize}
  FGreeting := TIdReplyPOP3.Create(nil);
  FGreeting.SetReply('+OK', RSPop3ProxyGreeting);    {Do not Localize}

  FReplyUnknownCommand := TIdReplyPOP3.Create(nil);
  FReplyUnknownCommand.SetReply('-ERR', RSPop3UnknownCommand);  {Do not Localize}

  DefaultPort := IdPORT_POP3;
  MappedPort := IdPORT_POP3;
  FContextClass := TIdMappedPOP3Context;
end;

procedure TIdMappedPOP3.SetGreeting(AValue: TIdReplyPOP3);
begin
   FGreeting.Assign(AValue);
end;

procedure TIdMappedPOP3.SetReplyUnknownCommand(const AValue: TIdReplyPOP3);
begin
  FReplyUnknownCommand.Assign(AValue);
end;

{ TIdMappedPOP3Context }

procedure TIdMappedPOP3Context.OutboundConnect;
var
  LHostPort, LPop3Cmd: String;
  LServer: TIdMappedPOP3;
Begin
  //don`t call inherited, NEW behavior
  LServer := TIdMappedPOP3(Server);
  Connection.IOHandler.Write(LServer.Greeting.FormattedReply);

  FOutboundClient := TIdTCPClient.Create(nil);
  TIdTcpClient(FOutboundClient).Port := LServer.MappedPort;
  TIdTcpClient(FOutboundClient).Host := LServer.MappedHost;

  FAllowedConnectAttempts := LServer.AllowedConnectAttempts;
  LServer.DoLocalClientConnect(Self);

  repeat
    if FAllowedConnectAttempts > 0 then begin
      Dec(FAllowedConnectAttempts);
    end;
    try
      // Greeting
      LHostPort := Trim(Connection.IOHandler.ReadLn);//USER username#host OR QUIT
      LPop3Cmd := Fetch(LHostPort, ' ', True);    {Do not Localize}
      if TextIsSame(LPop3Cmd, 'QUIT') then    {Do not Localize}
      begin
        Connection.IOHandler.WriteLn('+OK ' + RSPop3QuitMsg);    {Do not Localize}
        Connection.Disconnect;
        Break;
      end else if TextIsSame(LPop3Cmd, 'USER') then    {Do not Localize}
      begin
        FUserName := Fetch(LHostPort, LServer.FUserHostDelimiter, True, False);//?:CaseSensetive
        LHostPort := TrimLeft(LHostPort); //TrimRight above
        LServer.ExtractHostAndPortFromLine(Self, LHostPort);
      end else begin
        Connection.IOHandler.Write(LServer.ReplyUnknownCommand.FormattedReply);
        Continue;
      end;//if

      if Length(TIdTCPClient(FOutboundClient).Host) < 1 then begin
        raise EIdException.Create(RSEmptyHost); // TODO: create a new Exception class for this
      end;

      TIdTCPClient(FOutboundClient).ConnectTimeout := FConnectTimeOut;
      TIdTCPClient(FOutboundClient).Connect;

      //Read Pop3 Banner for OnOutboundClientConnect
      FGreeting := FOutboundClient.IOHandler.ReadLn;
      FOutboundClient.IOHandler.WriteLn('USER ' + FUserName);    {Do not Localize}
    except
      on E: Exception do // DONE: Handle connect failures
      begin
        FErrorMsg := '[' + E.ClassName + '] ' + E.Message;    {Do not Localize}
        DoException(E);
        Connection.IOHandler.WriteLn('-ERR ' + FErrorMsg);
      end;
    end;//trye
  until FOutboundClient.Connected or (FAllowedConnectAttempts < 1);

  if FOutboundClient.Connected then begin
    LServer.DoOutboundClientConnect(Self);
  end else begin
    Connection.Disconnect; //prevent all next work
  end;
end;

end.