(Delphi ActiveX) S3 - Working with Buckets in a Region

Demonstrates how to work with S3 buckets located in a particular region.

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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
rest: TChilkatRest;
bTls: Integer;
port: Integer;
bAutoReconnect: Integer;
success: Integer;
authAws: TChilkatAuthAws;
fileData: TChilkatBinData;
responseBody: TChilkatStringBuilder;
statusCode: Integer;

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

// When usig the REST class to access an S3 bucket that has been created in a particular region,
// there are three important things to remember:
// 
// 1) Connect to the domain that includes the region.  For example, instead of connecting to
//    "s3.amazonaws.com", connect to "s3.eu-central-1.amazonaws.com" if your bucket is in the EU Frankfurt region.
//    See http://docs.aws.amazon.com/general/latest/gr/rande.html#s3_region   for a list of S3 region domains (endpoints)
// 
// 2) Set the AuthAws.Region property equal to the region, such as "eu-central-1".
// 
// 3) Include the region in request's Host header.
// 

// This example will upload to a bucket in the eu-central-1 region.
// 
rest := TChilkatRest.Create(Self);

// Connect to the Amazon AWS REST server.
bTls := 1;
port := 443;
bAutoReconnect := 1;
success := rest.Connect('s3.eu-central-1.amazonaws.com',port,bTls,bAutoReconnect);

// Provide AWS credentials for the REST call.
authAws := TChilkatAuthAws.Create(Self);
authAws.AccessKey := 'AWS_ACCESS_KEY';
authAws.SecretKey := 'AWS_SECRET_KEY';
authAws.ServiceName := 's3';
authAws.Region := 'eu-central-1';
success := rest.SetAuthAws(authAws.ControlInterface);

// Set the bucket name via the HOST header.
// In this case, the bucket name is "chilkateufrankfurt" (which was created in the eu-central-1 region)
rest.Host := 'chilkateufrankfurt.s3.eu-central-1.amazonaws.com';

fileData := TChilkatBinData.Create(Self);
success := fileData.LoadFile('qa_data/jpg/starfish.jpg');

// Upload the file to Amazon S3.
responseBody := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestBd('PUT','/starfish.jpg',fileData.ControlInterface,responseBody.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

// Did we get a 200 response indicating success?
statusCode := rest.ResponseStatusCode;
if (statusCode <> 200) then
  begin
    Memo1.Lines.Add('Error response: ' + responseBody.GetAsString());
    Memo1.Lines.Add('Status code: ' + IntToStr(statusCode) + ', Status text: ' + rest.ResponseStatusText);
    Exit;
  end;

Memo1.Lines.Add('File successfully uploaded.');
end;