Pascal (Lazarus/Delphi)

Create S3 Bucket in a Region

See more Amazon S3 Examples

Demonstrates how to create an S3 bucket in a specified region. This example will create a bucket in the eu-west-2 region. 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.AuthAws,
  Chilkat.Rest,
  Chilkat.Xml,
  Chilkat.StringBuilder;

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

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  authAws: TAuthAws;
  bucketRegion: string;
  sbBucketRegion: TStringBuilder;
  xml: TXml;
  responseStr: string;
  responseXml: TXml;

begin
  success := False;

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

  rest := TRest.Create;

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

  //  Provide AWS credentials for the REST call.
  authAws := TAuthAws.Create;
  authAws.AccessKey := 'AWS_ACCESS_KEY';
  authAws.SecretKey := 'AWS_SECRET_KEY';
  authAws.ServiceName := 's3';
  success := rest.SetAuthAws(authAws);

  //  We'll send a PUT request having an XML body such as this:
  //  <CreateBucketConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/"> 
  //    <LocationConstraint>BucketRegion</LocationConstraint> 
  //    </CreateBucketConfiguration>

  //  Create the XML body specifying the region as "eu-west-2"
  bucketRegion := 'eu-west-2';
  sbBucketRegion := TStringBuilder.Create;
  sbBucketRegion.Append(bucketRegion);

  //  We only need to specify the LocationConstraint if the bucket's region is NOT us-east-1
  xml := TXml.Create;
  if (not sbBucketRegion.ContentsEqual('us-east-1')) then
    begin
      xml.Tag := 'CreateBucketConfiguration';
      xml.AddAttribute('xmlns','http://s3.amazonaws.com/doc/2006-03-01/');
      xml.UpdateChildContent('LocationConstraint','eu-west-2');
    end;

  //  --------------------------------------------------------------
  //  IMPORTANT: To create a bucket in the default us-east-1 region,
  //  do not add the LocationConstraint.  Adding a LocationConstraint of "us-east-1"
  //  causes an error "The specified location-constraint is not valid."
  //  By default, the bucket is created in us-east-1 by sending a PUT with an empty body.
  //  --------------------------------------------------------------

  //  Set the bucket name via the HOST header.
  //  In this case, the bucket name is "chilkateuwest2".
  rest.Host := 'chilkateuwest2.s3.amazonaws.com';

  //  Make the call to create the bucket.

  if (not sbBucketRegion.ContentsEqual('us-east-1')) then
    begin
      responseStr := rest.FullRequestString('PUT','/',xml.GetXml());
    end
  else
    begin
      //  If the bucket is to be created in the us-east-1 region (the default region)
      //  just send a PUT with no body.
      responseStr := rest.FullRequestNoBody('PUT','/');
    end;
  if (rest.LastMethodSuccess <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  if (rest.ResponseStatusCode <> 200) then
    begin
      WriteLn('status code = ' + rest.ResponseStatusCode);
      responseXml := TXml.Create;
      responseXml.LoadXml(responseStr);
      WriteLn(responseXml.GetXml());
      WriteLn('Failed.');
      Exit;
    end;

  WriteLn('Bucket in the eu-west-2 region created.');


  rest.Free;
  authAws.Free;
  sbBucketRegion.Free;
  xml.Free;
      responseXml.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.