Lazarus Pascal

Backblaze S3 Download File

See more Backblaze S3 Examples

Demonstrates how to download a file from a Backblaze bucket.

The Chilkat S3 functions in the HTTP class are compatible with the Backblaze service. However, because of some specific issues, Chilkat v9.5.0.89 or later is needed.

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.Http;

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

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  bucketName: string;
  objectName: string;
  localFilePath: string;

begin
  success := False;

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

  http := THttp.Create;

  //  keyID = Access Key ID or Access Key
  http.AwsAccessKey := 'access-key';

  //  applicationKey = Secret Access Key or Secret Key
  http.AwsSecretKey := 'secret-key';

  //  Region is the 2nd part of your S3 Endpoint
  http.AwsEndpoint := 's3.us-west-002.backblazeb2.com';

  bucketName := 'chilkat-test';
  objectName := 'seahorse.jpg';
  localFilePath := 'qa_output/seahorse.jpg';

  success := http.S3_DownloadFile(bucketName,objectName,localFilePath);
  if (success <> True) then
    begin
      WriteLn(http.LastErrorText);
    end
  else
    begin
      WriteLn('File downloaded.');
    end;


  http.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.