Pascal (Lazarus/Delphi)

REST File Upload (multipart/form-data)

See more REST Examples

Demonstrates how to upload a file using multipart/form-data. Pascal (Lazarus/Delphi)

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.Stream,
  Chilkat.Rest;

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

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  fileStream: TStream;
  responseBody: string;

begin
  success := False;

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

  rest := TRest.Create;

  //  Connect to the HTTP server using TLS.
  bTls := True;
  port := 443;
  bAutoReconnect := True;
  //  Make sure to replace "www.chilkatsoft.com" with your domain..
  success := rest.Connect('www.chilkatsoft.com',port,bTls,bAutoReconnect);
  if (success <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  fileStream := TStream.Create;
  fileStream.SourceFile := 'qa_data/jpg/starfish.jpg';

  rest.AddHeader('Content-Type','multipart/form-data');

  rest.PartSelector := '1';
  rest.AddHeader('Content-Type','image/jpg');
  rest.AddHeader('Content-Disposition','form-data; name="filename"; filename="starfish.jpg"');
  rest.SetMultipartBodyStream(fileStream);
  rest.PartSelector := '0';

  responseBody := rest.FullRequestMultipart('POST','/the_uri_path_to_receive_the_upload');
  if (rest.LastMethodSuccess <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  if (rest.ResponseStatusCode <> 200) then
    begin
      WriteLn('Received error response code: ' + rest.ResponseStatusCode);
      Exit;
    end;

  WriteLn('File uploaded');


  rest.Free;
  fileStream.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.