Pascal (Lazarus/Delphi)

Box.com Download Binary File to Memory

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Retrieves the actual data of the file into a memory (not to a local file). 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.BinData,
  Chilkat.Http;

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

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

begin
  success := False;

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

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

  //  Provide a previously obtained OAuth2 access token.
  //  See Get Box OAuth2 Access Token.
  http.AuthToken := 'BOX_ACCESS_TOKEN';

  http.FollowRedirects := True;

  //  The file is specified by the file ID.
  //  In this case, we're downloading a file with FILE_ID = 283371752129.
  //  The general form of the URL for downloading is: https://api.box.com/2.0/files/FILE_ID/content
  bd := TBinData.Create;
  success := http.DownloadBd('https://api.box.com/2.0/files/283371752129/content',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('Downloaded tigers.jpeg into an object holding the binary data.');

      WriteLn('Number of bytes: ' + bd.NumBytes);
    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.