Subir por post un archivo a un sitio web usando winsock

[recargador]

bueno mejore un poco el codigo pero los archivos me siguen llegando cortados como si encontraran un caracterer en el archivo que corta el envio si alguien me pude dar una mano

program ENVIOfile;

// Basic includes
uses
  Windows,
  SysUtils,
  SocketUnit, Classes,Dialogs;

// Constants
const
  CRLF        =  #13#10;
  CRLF2       =  CRLF+CRLF;
  boundary    = '---------------------------123456789';
// Global variables
var

  ClientSocket: TClientSocket;
  mensaje,Request,url,site:    String;
  Response:   Array [0..1] of String;



Function MyPos(Substr, Str: PChar): dword; stdcall;
asm
 mov eax, Substr
 mov edx, str
 test eax, eax
 je @noWork
 test edx, edx
 je @stringEmpty
 push ebx
 push esi
 push edi
 mov esi, eax
 mov edi, edx
 push eax
 push edx
 call lstrlen
 mov ecx, eax
 pop eax
 push edi
 push eax
 push eax
 call lstrlen
 mov edx, eax
 pop eax
 dec edx
 js @fail
 mov al, [esi]
 inc esi
 sub ecx, edx
 jle @fail
 
@loop:
 repne scasb
 jne @fail
 mov ebx, ecx
 push esi
 push edi
 mov ecx, edx
 repe cmpsb
 pop edi
 pop esi
 je @found
 mov ecx, ebx
 jmp @loop

@fail:
 pop edx
 xor eax, eax
 jmp @exit

@stringEmpty:
 xor eax, eax
 jmp @noWork

@found:
 pop edx
 mov eax, edi
 sub eax, edx

@exit:
 pop edi
 pop esi
 pop ebx
 
@noWork:
end;

{ Êîïèðîâàíèå ñòðîê }
Function MyCopy(S:PChar; Index, Count: Dword): PChar; stdcall;
asm
 mov eax, Count
 inc eax
 push eax
 push LPTR
 call LocalAlloc
 mov edi, eax
 mov ecx, Count
 mov esi, S
 add esi, Index
 dec esi
 rep movsb
end;

{ Êîïèðîâàíèå ó÷àñòêà ïàìÿòè }
procedure MyCopyMemory(Destination: Pointer; Source: Pointer; Length: DWORD);
asm
 push ecx
 push esi
 push edi
 mov esi, Source
 mov edi, Destination
 mov ecx, Length
 rep movsb
 pop edi
 pop esi
 pop ecx
end;


  function ContentLengthHeaderLine(Value: String): String;
  begin
     result:=Format('Content-Length: %d', [Length(Value)])+CRLF;
  end;

  function CloseHeaderLine(Value: Boolean): String;
  begin
     if Value then
        result:='Connection: close'+CRLF
     else
        result:='Connection: keep-alive'+CRLF;
  end;

  function HostHeaderLine(Value: String): String;
  begin
     result:=Format('Host: %s', ['www.'+Value])+CRLF;
  end;

  function ContentTypeHeaderLine(Value: String): String;
  begin
     result:=Format('Content-Type: %s', [Value])+CRLF;
  end;

  function ContentHeaderLine(Value: String): String;
  begin
  result:='--' + boundary + CRLF + 'Content-Disposition: form-data; name="userfile"; filename="' + Value + '"' + CRLF;

  end;

  function HeaderPostphp(Value: String): String;
  begin
     result:=Format('POST %s', [Value+' HTTP/1.1'])+CRLF;
  end;

   function ContentTypeHeader(): String;
  begin
     result:=Format('Content-Type: %s', [ 'multipart/form-data; boundary=' + boundary])+CRLF;
  end;

    function CPUHeader(): String;
  begin
     result:=Format('UA-CPU: %s', ['x86'])+CRLF;
  end;

     function EncodingHeader(): String;
  begin
     result:=Format('Accept-Encoding: %s', ['BASE64'])+CRLF;
  end;
       function AgentHeader(): String;
  begin
     result:=Format('User-Agent: %s', ['Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/' +
  'bot.html; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; ' +
  'MEGAUPLOAD 2.0)'])+CRLF;
  end;

        function CacheHeader(): String;
  begin
     result:=Format('Cache-Control: %s', ['no-cache'])+CRLF2;
  end;


  function SuccessHeaderPostFile(Value: String): AnsiString;
var
    ms: TMemoryStream;
    ss: TStringStream;
    strData2:ansistring;
begin

     strData2 := strData2+ContentHeaderLine(Value) ;
     strData2 := strData2+ContentTypeHeaderLine('application/x-zip-compressed');

    ms := TMemoryStream.Create;
      try
        ms.LoadFromFile(Value) ;
        ss := TStringStream.Create('') ;
        try
          ss.CopyFrom(ms, ms.Size) ;

          strData2 := strData2+ss.DataString + CRLF;

        finally
          ss.Free;
        end;
      finally
        ms.Free;
      end;
      strData2 := strData2 + '--' + boundary + '--'+CRLF; // FOOTER
      strData2 := strData2 + #0;
      result:=strData2;
  end;

  function AcceptHeaderLine(): String;
  begin
     result:=Format('Accept: %s', ['image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/xaml+xml,'+' application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, application/x-shockwave-flash, */*'])+CRLF;
  end;

   function RefererHeaderLine(Value: String): String;
  begin
     result:=Format('Referer: %s', ['http://www.'+Value+'/index.php'])+CRLF;
  end;


    function LanguageHeaderLine(Value: String): String;
  begin
     result:=Format('Accept-Language: %s', [Value])+CRLF;
  end;


    function UploadFileHttp(Address,archivo: String): Boolean;
begin

       Site := MyCopy(pchar(Address), 1, MyPos('/', pchar(Address)) - 1);
       URL  := MyCopy(pchar(Address), MyPos('/', pchar(Address)), lstrlen(pchar(Address)) - MyPos('/', pchar(Address)) + 1);


        Response[1]:=SuccessHeaderPostFile(archivo);
        Response[0]:=HeaderPostphp(URL);
        Response[0]:=Response[0]+AcceptHeaderLine;
        Response[0]:=Response[0]+RefererHeaderLine(Site);
        Response[0]:=Response[0]+LanguageHeaderLine('es-ar');
        Response[0]:=Response[0]+ContentTypeHeader;
        Response[0]:=Response[0]+CPUHeader;
        Response[0]:=Response[0]+EncodingHeader;
        Response[0]:=Response[0]+AgentHeader;
        Response[0]:=Response[0]+HostHeaderLine(Site);
        Response[0]:=Response[0]+ContentLengthHeaderLine(Response[1]);
        Response[0]:=Response[0]+CloseHeaderLine(False);
        Response[0]:=Response[0]+CacheHeader;
        ClientSocket := TClientSocket.Create;
        ClientSocket.Connect(site, 80);
        ShowMessage(Response[0]);
        showmessage(Response[1]);
        ClientSocket.SendString(Response[0]);
        ClientSocket.SendString(Response[1]);
        ClientSocket.Idle(0);
        MessageBox(0, pchar(ClientSocket.ReceiveString), 'fidel', 0);
        ClientSocket.Disconnect;
        ClientSocket.Free;
        end;


begin
UploadFileHttp('hosting.com/subearchivo.php',
  'c:\TempDirectory\BACKUP1932008.zip.z01') ;


end.