(Delphi DLL) Demonstrate S3_DownloadBytes

Demonstrates how to download a file into memory from the Amazon S3 service.

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

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

...

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

begin
// This example assumes the Chilkat HTTP 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');

bucketName := 'chilkat.qa';
objectName := 'images/sea_creatures/starfish.jpg';
localFilePath := 'qa_output/starfish.jpg';

jpgBytes := CkByteData_Create();

success := CkHttp_S3_DownloadBytes(http,bucketName,objectName,jpgBytes);
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

Memo1.Lines.Add('Download successful.');

fac := CkFileAccess_Create();
success := CkFileAccess_WriteEntireFile(fac,localFilePath,jpgBytes);
Memo1.Lines.Add('File saved success = ' + IntToStr(success));

CkHttp_Dispose(http);
CkByteData_Dispose(jpgBytes);
CkFileAccess_Dispose(fac);

end;