Send a Staged REST Request with a Binary Body

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Demonstrates Rest.SendReqBd, which sends a request whose binary body is read from a BinData, then reads the response in separate steps.

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;
  bdBody: TBinData;
  bLoaded: Boolean;
  statusCode: Integer;
  responseBody: string;

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.

  //  Send a request whose binary body is read from a BinData.
  bdBody := TBinData.Create;
  bLoaded := bdBody.LoadFile('qa_data/image.png');
  if (bLoaded <> True) then
    begin
      WriteLn('Failed to load the request body file.');
      Exit;
    end;

  rest.AddHeader('Content-Type','image/png');

  success := rest.SendReqBd('PUT','/api/images/1',bdBody);
  if (success = False) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  //  After sending, read the response status line and header fields.  The return value is the HTTP
  //  status code, or -1 if no response was received.
  statusCode := rest.ReadResponseHeader();
  if (statusCode < 0) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;
  WriteLn('Response status code: ' + statusCode);

  //  Read the response body as text.
  responseBody := rest.ReadRespBodyString();
  if (rest.LastMethodSuccess = False) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;
  WriteLn(responseBody);


  rest.Free;
  bdBody.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.