Pascal (Lazarus/Delphi)

S3 Find Bucket Region

See more Amazon S3 (new) Examples

Demonstrates how to find out the region of an S3 bucket. 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;

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

procedure RunDemo;
var
  success: Boolean;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  authAws: TAuthAws;
  strResult: string;
  responseStatusCode: Integer;
  xml: TXml;

begin
  success := False;

  //  This 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 using the correct region (in this example, "us-west-2")
  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);

  //  The bucket name we want to know about is set in the HOST header.
  //  In this example, we want to find the region for the "chilkat.qa" bucket.
  rest.Host := 'chilkat.qa.s3.amazonaws.com';

  //  Send the GET request to query the bucket location.
  strResult := rest.FullRequestNoBody('GET','/?location');
  if (rest.LastMethodSuccess <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  responseStatusCode := rest.ResponseStatusCode;
  WriteLn('Response status code = ' + responseStatusCode);
  if (responseStatusCode <> 200) then
    begin
      WriteLn(rest.ResponseHeader);
      WriteLn(strResult);
      WriteLn('Failed.');
      Exit;
    end;

  WriteLn(strResult);

  //  The result contains XML like this:
  //  <?xml version="1.0" encoding="UTF-8"?>
  //  <LocationConstraint xmlns="http://s3.amazonaws.com/doc/2006-03-01/">us-west-2</LocationConstraint>

  //  Get the "us-west-2" from the XML
  xml := TXml.Create;
  success := xml.LoadXml(strResult);
  WriteLn('region = ' + xml.Content);


  rest.Free;
  authAws.Free;
  xml.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.