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Baixar arquivos internet/intranet

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BAIXAR ARQUIVOS INTERNET/INTRANET

//declare em uses: Wininet;

function GetInetFile

(const fileURL, FileName: String): boolean;

const BufferSize = 1024;

var

  hSession, hURL: HInternet;

  Buffer: array[1..BufferSize] of Byte;

  BufferLen: DWORD;

  f: File;

  sAppName: string;

begin

 Result:=False;

 sAppName := ExtractFileName(Application.ExeName);

 hSession := InternetOpen(PChar(sAppName),

                INTERNET_OPEN_TYPE_PRECONFIG,

               nil, nil, 0);

 try

  hURL := InternetOpenURL(hSession,

            PChar(fileURL),

            nil,0,0,0);

  try

   AssignFile(f, FileName);

   Rewrite(f,1);

   repeat

    InternetReadFile(hURL, @Buffer,

                     SizeOf(Buffer), BufferLen);

    BlockWrite(f, Buffer, BufferLen)

   until BufferLen = 0;

   CloseFile(f);

   Result:=True;

  finally

   InternetCloseHandle(hURL)

  end

 finally

  InternetCloseHandle(hSession)

 end

end;

====================================================

//Usage

//To call the GetInetFile function you could use the next peace of code: 

var FileOnNet, LocalFileName: string

begin

 FileOnNet:=

  'http://delphi.about.com/library/forminbpl.zip';

 LocalFileName:='File Downloaded From the Net.zip'

 if GetInetFile(FileOnNet,LocalFileName)=True then

  ShowMessage('Download successful')

 else

  ShowMessage('Error in file download')

end;