Download a Binary REST Response into BinData

See more REST Examples

Demonstrates Rest.FullRequestNoBodyBd, which sends a request with no body and stores the binary response body in a BinData.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

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.Rest;

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

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  bAutoReconnect: Boolean;
  bdResponse: TBinData;
  bSaved: Boolean;

begin
  success := False;

  rest := TRest.Create;
  bTls := True;
  bAutoReconnect := True;
  success := rest.Connect('example.com',443,bTls,bAutoReconnect);
  if (success = False) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  //  The file paths are relative to the application's current working directory.  Absolute paths
  //  may also be used.  Supply the paths appropriate to your own environment.

  //  FullRequestNoBodyBd sends a request with no body and stores the binary response body in a
  //  BinData.  This is appropriate when the response is binary, such as an image or file download.
  bdResponse := TBinData.Create;
  success := rest.FullRequestNoBodyBd('GET','/api/images/1',bdResponse);
  if (success = False) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  bSaved := bdResponse.WriteFile('qa_output/image.png');
  if (bSaved <> True) then
    begin
      WriteLn('Failed to save the response body.');
      Exit;
    end;
  WriteLn('Downloaded ' + bdResponse.NumBytes + ' bytes.');


  rest.Free;
  bdResponse.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.