(Delphi DLL) EC2 Start Instances

See more Amazon EC2 Examples

Demonstrates how to send a request to start Amazon EC2 instances.

For more information, see https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_StartInstances.html

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, AuthAws, Rest, Xml;

...

procedure TForm1.Button1Click(Sender: TObject);
var
rest: HCkRest;
bTls: Boolean;
port: Integer;
bAutoReconnect: Boolean;
success: Boolean;
authAws: HCkAuthAws;
responseXml: PWideChar;
xml: HCkXml;

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

rest := CkRest_Create();

// Connect to the Amazon AWS server.
// such as https://ec2.amazonaws.com/
bTls := True;
port := 443;
bAutoReconnect := True;
success := CkRest_Connect(rest,'ec2.us-west-2.amazonaws.com',port,bTls,bAutoReconnect);

// Provide AWS credentials for the REST call.
authAws := CkAuthAws_Create();
CkAuthAws_putAccessKey(authAws,'AWS_ACCESS_KEY');
CkAuthAws_putSecretKey(authAws,'AWS_SECRET_KEY');
// the region should match the region part of the domain passed to the REST connect method (above).
CkAuthAws_putRegion(authAws,'us-west-2');
CkAuthAws_putServiceName(authAws,'ec2');

CkRest_SetAuthAws(rest,authAws);

CkRest_AddQueryParam(rest,'Action','StartInstances');
CkRest_AddQueryParam(rest,'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")
CkRest_AddQueryParam(rest,'DryRun','true');
CkRest_AddQueryParam(rest,'InstanceId.1','i-999719995399c9999');

responseXml := CkRest__fullRequestNoBody(rest,'GET','/');
if (CkRest_getLastMethodSuccess(rest) <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

// A successful response will have a status code equal to 200.
if (CkRest_getResponseStatusCode(rest) <> 200) then
  begin
    Memo1.Lines.Add('response status code = ' + IntToStr(CkRest_getResponseStatusCode(rest)));
    Memo1.Lines.Add('response status text = ' + CkRest__responseStatusText(rest));
    Memo1.Lines.Add('response header: ' + CkRest__responseHeader(rest));
    Memo1.Lines.Add('response body: ' + responseXml);
    Exit;
  end;

// Examine the successful XML response.
xml := CkXml_Create();
CkXml_LoadXml(xml,responseXml);
Memo1.Lines.Add(CkXml__getXml(xml));

CkRest_Dispose(rest);
CkAuthAws_Dispose(authAws);
CkXml_Dispose(xml);

end;