Lazarus Pascal

Download Image (JPG, GIF, etc.) to Base64

See more HTTP Examples

Demonstrates how to download an image, or any type of file, to get the data in base64 encoding format. Lazarus Pascal

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.BinData,
  Chilkat.Http;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  bd: TBinData;
  statusCode: Integer;
  base64_image_data: string;

begin
  success := False;

  //  This example requires the Chilkat API to have been previously unlocked.
  //  See Global Unlock Sample for sample code.

  http := THttp.Create;
  http.KeepResponseBody := True;

  bd := TBinData.Create;

  success := http.DownloadBd('https://www.chilkatsoft.com/images/starfish.jpg',bd);
  statusCode := http.LastStatus;
  if (success = False) then
    begin
      if (statusCode = 0) then
        begin
          //  Unable to either send the request or get the response.
          WriteLn(http.LastErrorText);
        end
      else
        begin
          //  We got a response, but the status code was not in the 200s
          WriteLn('Response status code: ' + statusCode);
          //  Examine the response body.
          WriteLn('Response body:');
          WriteLn(http.LastResponseBody);
        end;
      WriteLn('Download failed.');

    end
  else
    begin
      WriteLn('Download success, response status = ' + statusCode);

      base64_image_data := bd.GetEncoded('base64');
      WriteLn('image data in base64 format:');
      WriteLn(base64_image_data);
    end;


  http.Free;
  bd.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.