unit Unit1; 

interface 

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

type 
  TForm1 = class(TForm) 
    ClientSocket1: TClientSocket; 
    ServerSocket1: TServerSocket; 
    btnTestSockets: TButton; 
    procedure ClientSocket1Read(Sender: TObject; Socket: TCustomWinSocket); 
    procedure FormCreate(Sender: TObject); 
    procedure FormDestroy(Sender: TObject); 
    procedure ClientSocket1Disconnect(Sender: TObject; 
      Socket: TCustomWinSocket); 
    procedure ClientSocket1Connect(Sender: TObject; 
      Socket: TCustomWinSocket); 
    procedure ServerSocket1ClientConnect(Sender: TObject; 
      Socket: TCustomWinSocket); 
    procedure btnTestSocketsClick(Sender: TObject); 
  private 
    FStream: TFileStream; 
    { Private-Deklarationen } 
  public 
    { Public-Deklarationen } 
  end; 

var 
  Form1: TForm1; 

implementation 

{$R *.dfm} 

procedure TForm1.ClientSocket1Read(Sender: TObject; 
  Socket: TCustomWinSocket); 
var 
  iLen: Integer; 
  Bfr: Pointer; 
begin 
  iLen := Socket.ReceiveLength; 
  GetMem(Bfr, iLen); 
  try 
    Socket.ReceiveBuf(Bfr^, iLen); 
    FStream.Write(Bfr^, iLen); 
  finally 
    FreeMem(Bfr); 
  end; 
end; 

procedure TForm1.FormCreate(Sender: TObject); 
begin 
  FStream := nil; 
end; 

procedure TForm1.FormDestroy(Sender: TObject); 
begin 
  if Assigned(FStream) then 
  begin 
    FStream.Free; 
    FStream := nil; 
  end; 
end; 

procedure TForm1.ClientSocket1Disconnect(Sender: TObject; 
  Socket: TCustomWinSocket); 
begin 
  if Assigned(FStream) then 
  begin 
    FStream.Free; 
    FStream := nil; 
  end; 
end; 

procedure TForm1.ClientSocket1Connect(Sender: TObject; 
  Socket: TCustomWinSocket); 
begin 
  FStream := TFileStream.Create('c:\temp\test.stream.html', fmCreate or fmShareDenyWrite); 
end; 

procedure TForm1.ServerSocket1ClientConnect(Sender: TObject; 
  Socket: TCustomWinSocket); 
begin 
  Socket.SendStream(TFileStream.Create('c:\temp\test.html', fmOpenRead or fmShareDenyWrite)); 
end; 

procedure TForm1.btnTestSocketsClick(Sender: TObject); 
begin 
  ServerSocket1.Active := True; 
  ClientSocket1.Active := True; 
end; 

end.