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unit TransServer;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, IdBaseComponent, IdComponent, IdTCPServer, StdCtrls,
  IdThreadMgr, IdThreadMgrDefault;

type
  TServerForm = class(TForm)
    Server: TIdTCPServer;
    CBServerAktiv: TCheckBox;
    IdThreadMgrDefault1: TIdThreadMgrDefault;
    procedure CBServerAktivClick(Sender: TObject);
    procedure ServerExecute(AThread: TIdPeerThread);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  ServerForm: TServerForm;

implementation

{$R *.dfm}

procedure TServerForm.CBServerAktivClick(Sender: TObject);
begin
  Server.Active := CBServerAktiv.Checked;
end;

procedure TServerForm.ServerExecute(AThread: TIdPeerThread);
var
  FStream: TFileStream;
begin
  FStream := TFileStream.Create('C:\server.tmp', fmOpenRead);
  try
    AThread.Connection.OpenWriteBuffer;
    AThread.Connection.WriteStream(FStream);
    AThread.Connection.CloseWriteBuffer;
  finally
    AThread.Connection.Disconnect;
    FStream.Free;
  end;
end;

end.                    

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unit TransClient;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, IdBaseComponent, IdComponent, IdTCPConnection,
  IdTCPClient, ExtCtrls;

type
  TClientForm = class(TForm)
    CBClientAktiv: TCheckBox;
    Client: TIdTCPClient;
    Button1: TButton;
    PButtons: TPanel;
    Label1: TLabel;
    EHost: TEdit;
    procedure CBClientAktivClick(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure EHostChange(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  ClientForm: TClientForm;

implementation

{$R *.dfm}

procedure TClientForm.CBClientAktivClick(Sender: TObject);
begin
  if CBClientAktiv.Checked then
  begin
    try
      Client.Connect(15000);  // in Indy < 8.1 leave the parameter away
    except
      on E: Exception do
        MessageDlg ('Fehler beim Verbinden:'#13+
                     E.Message, mtError, [mbOk], 0);
    end;
  end
  else
  begin
    Client.Disconnect;
  end;

  CBClientAktiv.Checked := Client.Connected;
  PButtons.Enabled := Client.Connected;
end;

procedure TClientForm.Button1Click(Sender: TObject);
var 
  FStream: TFileStream;
begin 
  FStream := TFileStream.Create('C:\client.tmp', fmCreate); 
  try
    Client.ReadStream(FStream, -1, True); // Stream empfangen
    FStream.Seek(0, soFromBeginning);
  finally
    FStream.Free; // Stream freigeben
  end;
end;

procedure TClientForm.EHostChange(Sender: TObject);
begin
  Client.Host := EHost.Text;
end;

end.