(Delphi ActiveX) SNS List Topics

List the existing SNS topics.

See SNS List Topics for more information.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
rest: TChilkatRest;
bTls: Integer;
port: Integer;
bAutoReconnect: Integer;
success: Integer;
authAws: TChilkatAuthAws;
responseXml: WideString;
xml: TChilkatXml;
notUsed: WideString;
i: Integer;
numTopics: Integer;

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

rest := TChilkatRest.Create(Self);

// Connect to the Amazon AWS REST server.
// such as https://sns.us-west-2.amazonaws.com/
bTls := 1;
port := 443;
bAutoReconnect := 1;
success := rest.Connect('sns.us-west-2.amazonaws.com',port,bTls,bAutoReconnect);

// Provide AWS credentials for the REST call.
authAws := TChilkatAuthAws.Create(Self);
authAws.AccessKey := 'AWS_ACCESS_KEY';
authAws.SecretKey := 'AWS_SECRET_KEY';
// the region should match our URL above..
authAws.Region := 'us-west-2';
authAws.ServiceName := 'sns';

rest.SetAuthAws(authAws.ControlInterface);

rest.AddQueryParam('Action','ListTopics');

responseXml := rest.FullRequestNoBody('GET','/');
if (rest.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

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

// Examine the successful XML response (shown below)
xml := TChilkatXml.Create(Self);
xml.LoadXml(responseXml);
Memo1.Lines.Add(xml.GetXml());

// To iterate over the TopicArn's
notUsed := xml.ChilkatPath('ListTopicsResult|Topics|$');
i := 0;
numTopics := xml.NumChildren;
while i < numTopics do
  begin
    xml.GetChild2(i);
    Memo1.Lines.Add(xml.GetChildContent('TopicArn'));
    xml.GetParent2();
    i := i + 1;
  end;

xml.GetRoot2();

// A sample successful response:
// <?xml version="1.0" encoding="utf-8" ?>
// <ListTopicsResponse xmlns="http://sns.amazonaws.com/doc/2010-03-31/">
//     <ListTopicsResult>
//         <Topics>
//             <member>
//                 <TopicArn>arn:aws:sns:us-west-2:957491831129:chilkat</TopicArn>
//             </member>
//             <member>
//                 <TopicArn>arn:aws:sns:us-west-2:957491831129:chilkat123</TopicArn>
//             </member>
//             <member>
//                 <TopicArn>arn:aws:sns:us-west-2:957491831129:chilkatses</TopicArn>
//             </member>
//         </Topics>
//     </ListTopicsResult>
//     <ResponseMetadata>
//         <RequestId>54514f94-b07d-5f0b-9c8a-1ff85ff4ac65</RequestId>
//     </ResponseMetadata>
// </ListTopicsResponse>
end;