Pascal (Lazarus/Delphi)

SQS List Queues

See more Amazon SQS Examples

Returns a list of your Amazon SQS queues. The maximum number of queues that can be returned is 1000. If you specify a value for the optional QueueNamePrefix query parameter, only queues with a name beginning with the specified value are returned. 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;
  i: Integer;
  numQueues: Integer;

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.
  //  such as https://sqs.us-west-2.amazonaws.com/
  bTls := True;
  port := 443;
  bAutoReconnect := True;
  success := rest.Connect('sqs.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 our URL above..
  authAws.Region := 'us-west-2';
  authAws.ServiceName := 'sqs';

  rest.SetAuthAws(authAws);

  rest.AddQueryParam('Action','ListQueues');
  //  List only queues having a name starting with "c".
  //  Comment out this line to list all queues.
  rest.AddQueryParam('QueueNamePrefix','c');

  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());
  WriteLn('----');

  //  A successful response looks like this:
  //  <?xml version="1.0" encoding="utf-8" ?>
  //  <ListQueuesResponse xmlns="http://queue.amazonaws.com/doc/2012-11-05/">
  //      <ListQueuesResult>
  //          <QueueUrl>https://sqs.us-west-2.amazonaws.com/123491855557/chilkatTest</QueueUrl>
  //          <QueueUrl>https://sqs.us-west-2.amazonaws.com/123496666627/chilkatses</QueueUrl>
  //      </ListQueuesResult>
  //      <ResponseMetadata>
  //          <RequestId>77bce138-fbcc-5e42-9ee3-b15c1f7178c2</RequestId>
  //      </ResponseMetadata>
  //  </ListQueuesResponse>

  //  Get each queue URL..
  xml.FindChild2('ListQueuesResult');
  i := 0;
  numQueues := xml.NumChildren;
  while i < numQueues do
    begin
      WriteLn('QueueUrl: ' + xml.GetChildContentByIndex(i));
      i := i + 1;
    end;

  xml.GetRoot2();


  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.