Delphi DLL

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.)

Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
bucketName: PWideChar;
objectName: PWideChar;
localFilePath: PWideChar;

begin
success := False;

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

http := CkHttp_Create();

CkHttp_putAwsAccessKey(http,'AWS_ACCESS_KEY');
CkHttp_putAwsSecretKey(http,'AWS_SECRET_KEY');
CkHttp_putAwsRegion(http,'us-east-1');
CkHttp_putAwsEndpoint(http,'s3.amazonaws.com');
CkHttp_putAwsSubResources(http,'versionId=x8UPzRsgskmbe55lEQvhLi25PQl2lcFH');

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

success := CkHttp_S3_DownloadFile(http,bucketName,objectName,localFilePath);

if (success <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
  end
else
  begin
    Memo1.Lines.Add('File downloaded.');
  end;

CkHttp_Dispose(http);

end;