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VB.NET Examples

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(VB.NET) SQS Delete Message

Deletes a message from an SQS queue. You specify the message by using the message's receipt handle and not the message ID you received when you sent the message. This example will first receive a message, and then use the receipt handle to delete it.

See SQS DeleteMessage or detailed information.

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

Dim rest As New Chilkat.Rest

'  Connect to the Amazon AWS REST server.
'  such as https://sqs.us-west-2.amazonaws.com/
Dim bTls As Boolean = True
Dim port As Integer = 443
Dim bAutoReconnect As Boolean = True
Dim success As Boolean = rest.Connect("sqs.us-west-2.amazonaws.com",port,bTls,bAutoReconnect)

'  Provide AWS credentials for the REST call.
Dim authAws As New Chilkat.AuthAws
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","ReceiveMessage")
rest.AddQueryParam("MaxNumberOfMessages","5")
rest.AddQueryParam("VisibilityTimeout","15")
rest.AddQueryParam("AttributeName","All")
rest.AddQueryParam("MessageAttributeName","All")

'  Use the actual path part of your SQS queue URL here:
Dim responseXml As String = rest.FullRequestNoBody("GET","/123456789123/chilkatTest")
If (rest.LastMethodSuccess <> True) Then
    Console.WriteLine(rest.LastErrorText)
    Exit Sub
End If


'  A successful response will have a status code equal to 200.
If (rest.ResponseStatusCode <> 200) Then
    Console.WriteLine("response status code = " & rest.ResponseStatusCode)
    Console.WriteLine("response status text = " & rest.ResponseStatusText)
    Console.WriteLine("response header: " & rest.ResponseHeader)
    Console.WriteLine("response body: " & responseXml)
    Exit Sub
End If


'  Examine the successful XML response.
Dim xml As New Chilkat.Xml
xml.LoadXml(responseXml)

'  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>123492831234</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:
Dim receiptHandle As String = xml.ChilkatPath("ReceiveMessageResult|Message|ReceiptHandle|*")
Console.WriteLine("ReceiptHandle = " & receiptHandle)

'  Now use the receipt handle to delete the message.
'  Use the same connection (or automatically reconnect if needed)
rest.ClearAllQueryParams()


rest.AddQueryParam("Action","DeleteMessage")
rest.AddQueryParam("ReceiptHandle",receiptHandle)

'  Use the actual path part of your SQS queue URL here:
responseXml = rest.FullRequestNoBody("GET","/123456789123/chilkatTest")
If (rest.LastMethodSuccess <> True) Then
    Console.WriteLine(rest.LastErrorText)
    Exit Sub
End If


'  A successful response will have a status code equal to 200.
If (rest.ResponseStatusCode <> 200) Then
    Console.WriteLine("response status code = " & rest.ResponseStatusCode)
    Console.WriteLine("response status text = " & rest.ResponseStatusText)
    Console.WriteLine("response header: " & rest.ResponseHeader)
    Console.WriteLine("response body: " & responseXml)
    Exit Sub
End If


'  Examine the successful XML response.
xml.LoadXml(responseXml)
Console.WriteLine(xml.GetXml())

'  A successful DeleteMessage response looks like this:
'  <DeleteMessageResponse>
'      <ResponseMetadata>
'          <RequestId>
'              b5293cb5-d306-4a17-9048-b263635abe42
'          </RequestId>
'      </ResponseMetadata>
'  </DeleteMessageResponse>

 

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