(Delphi DLL) SQS Receive Message

Retrieves one or more messages from an Amazon SQS queue, with a maximum limit of 10 messages, from the specified queue.

See SQS ReceiveMessage or detailed information.

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;
unused: PWideChar;
rec: 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 REST server.
// such as https://sqs.us-west-2.amazonaws.com/
bTls := True;
port := 443;
bAutoReconnect := True;
success := CkRest_Connect(rest,'sqs.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 our URL above..
CkAuthAws_putRegion(authAws,'us-west-2');
CkAuthAws_putServiceName(authAws,'sqs');

CkRest_SetAuthAws(rest,authAws);

CkRest_AddQueryParam(rest,'Action','ReceiveMessage');
CkRest_AddQueryParam(rest,'MaxNumberOfMessages','5');
CkRest_AddQueryParam(rest,'VisibilityTimeout','15');
CkRest_AddQueryParam(rest,'AttributeName','All');
CkRest_AddQueryParam(rest,'MessageAttributeName','All');

// Use the actual path part of your SQS queue URL here:
responseXml := CkRest__fullRequestNoBody(rest,'GET','/123456789123/chilkatTest');
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));
Memo1.Lines.Add('----');

// A successful response looks like this:
// <?xml version="1.0" encoding="utf-8" ?>
// <ReceiveMessageResponse xmlns="http://queue.amazonaws.com/doc/2012-11-05/">
//     <ReceiveMessageResult>
//         <Message>
//             <Body>this is a test</Body>
//             <MD5OfBody>54b0c58c7ce9f2a8b551351102ee0938</MD5OfBody>
//             <ReceiptHandle>AQEBMyLof...UbKBTvHtEg==</ReceiptHandle>
//             <Attribute>
//                 <Name>SenderId</Name>
//                 <Value>957491831129</Value>
//             </Attribute>
//             <Attribute>
//                 <Name>ApproximateFirstReceiveTimestamp</Name>
//                 <Value>1475013283557</Value>
//             </Attribute>
//             <Attribute>
//                 <Name>ApproximateReceiveCount</Name>
//                 <Value>4</Value>
//             </Attribute>
//             <Attribute>
//                 <Name>SentTimestamp</Name>
//                 <Value>1475013283557</Value>
//             </Attribute>
//             <MessageId>52882c65-5e21-4450-9024-93a3b01e61d3</MessageId>
//             <MD5OfMessageAttributes>2ff68603f4239272bd03f543254ed040</MD5OfMessageAttributes>
//         </Message>
//     </ReceiveMessageResult>
//     <ResponseMetadata>
//         <RequestId>05ba5c92-80ee-5f87-be76-0cf67b7475d6</RequestId>
//     </ResponseMetadata>
// </ReceiveMessageResponse>

// Get some values from the XML:
Memo1.Lines.Add('Body: ' + CkXml__chilkatPath(xml,'ReceiveMessageResult|Message|Body|*'));
Memo1.Lines.Add('MessageId: ' + CkXml__chilkatPath(xml,'ReceiveMessageResult|Message|MessageId|*'));

unused := CkXml__chilkatPath(xml,'ReceiveMessageResult|Message[0]|Attribute|$');

rec := CkXml_FindNextRecord(xml,'Name','SenderId');
Memo1.Lines.Add('SenderId: ' + CkXml__getChildContent(rec,'Value'));
CkXml_Dispose(rec);

rec := CkXml_FindNextRecord(xml,'Name','ApproximateFirstReceiveTimestamp');
Memo1.Lines.Add('ApproximateFirstReceiveTimestamp: ' + CkXml__getChildContent(rec,'Value'));
CkXml_Dispose(rec);

rec := CkXml_FindNextRecord(xml,'Name','ApproximateReceiveCount');
Memo1.Lines.Add('ApproximateReceiveCount: ' + CkXml__getChildContent(rec,'Value'));
CkXml_Dispose(rec);

rec := CkXml_FindNextRecord(xml,'Name','SentTimestamp');
Memo1.Lines.Add('SentTimestamp: ' + CkXml__getChildContent(rec,'Value'));
CkXml_Dispose(rec);

CkXml_GetRoot2(xml);

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

end;