Pascal (Lazarus/Delphi)

EC2 Stop Instances

See more Amazon EC2 Examples

Demonstrates how to send a request to stop Amazon EC2 instances. 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;
  responseXml: string;
  xml: 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 server.
  //  such as https://ec2.amazonaws.com/
  bTls := True;
  port := 443;
  bAutoReconnect := True;
  success := rest.Connect('ec2.us-west-2.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';
  //  the region should match the region part of the domain passed to the REST connect method (above).
  authAws.Region := 'us-west-2';
  authAws.ServiceName := 'ec2';

  rest.SetAuthAws(authAws);

  rest.AddQueryParam('Action','StopInstances');
  rest.AddQueryParam('Version','2016-11-15');
  //  If DryRun is true then checks whether you have the required permissions for the action, 
  //  without actually making the request, and provides an error response. If you have the required permissions, 
  //  the error response is DryRunOperation. Otherwise, it is UnauthorizedOperation.
  //  Omit the DryRun query parameter to actually start the instance.  (Or set DryRun equal to "false")
  rest.AddQueryParam('DryRun','true');
  rest.AddQueryParam('InstanceId.1','i-999719995399c9999');

  //  See EC2 Stop Instances Reference Documentation
  //  for more information about the Force and Hibernate query params, which are optional and true/false just like DryRun.

  responseXml := rest.FullRequestNoBody('GET','/');
  if (rest.LastMethodSuccess <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  //  A successful response will have a status code equal to 200.
  if (rest.ResponseStatusCode <> 200) then
    begin
      WriteLn('response status code = ' + rest.ResponseStatusCode);
      WriteLn('response status text = ' + rest.ResponseStatusText);
      WriteLn('response header: ' + rest.ResponseHeader);
      WriteLn('response body: ' + responseXml);
      Exit;
    end;

  //  Examine the successful XML response.
  xml := TXml.Create;
  xml.LoadXml(responseXml);
  WriteLn(xml.GetXml());


  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.