Pascal (Lazarus/Delphi)

S3 Download Specific Version of File

See more Amazon S3 Examples

Demonstrates how to download a file from the Amazon S3 service using the versionId query parameter.

Note: This example requires Chilkat v9.5.0.89 or later. (A problem regarding AwsSubResources w/ downloads was fixed shortly after the v9.5.0.88 release.)

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.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;

  http.AwsAccessKey := 'AWS_ACCESS_KEY';
  http.AwsSecretKey := 'AWS_SECRET_KEY';
  http.AwsRegion := 'us-east-1';
  http.AwsEndpoint := 's3.amazonaws.com';
  http.AwsSubResources := 'versionId=x8UPzRsgskmbe55lEQvhLi25PQl2lcFH';

  bucketName := 'chilkat100';
  objectName := 'frenchUtf8.txt';
  localFilePath := 'qa_output/frenchUtf8.txt';

  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.