PureBasic
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 PureBasic Downloads

PureBasic
IncludeFile "CkXml.pb"
IncludeFile "CkAuthAws.pb"
IncludeFile "CkRest.pb"

Procedure ChilkatExample()

    success.i = 0

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

    rest.i = CkRest::ckCreate()
    If rest.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

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

    ; Provide AWS credentials for the REST call.
    authAws.i = CkAuthAws::ckCreate()
    If authAws.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkAuthAws::setCkAccessKey(authAws, "AWS_ACCESS_KEY")
    CkAuthAws::setCkSecretKey(authAws, "AWS_SECRET_KEY")
    ; the region should match our URL above..
    CkAuthAws::setCkRegion(authAws, "us-west-2")
    CkAuthAws::setCkServiceName(authAws, "sqs")

    CkRest::ckSetAuthAws(rest,authAws)

    CkRest::ckAddQueryParam(rest,"Action","ReceiveMessage")
    CkRest::ckAddQueryParam(rest,"MaxNumberOfMessages","5")
    CkRest::ckAddQueryParam(rest,"VisibilityTimeout","15")
    CkRest::ckAddQueryParam(rest,"AttributeName","All")
    CkRest::ckAddQueryParam(rest,"MessageAttributeName","All")

    ; Use the actual path part of your SQS queue URL here:
    responseXml.s = CkRest::ckFullRequestNoBody(rest,"GET","/123456789123/chilkatTest")
    If CkRest::ckLastMethodSuccess(rest) <> 1
        Debug CkRest::ckLastErrorText(rest)
        CkRest::ckDispose(rest)
        CkAuthAws::ckDispose(authAws)
        ProcedureReturn
    EndIf

    ; A successful response will have a status code equal to 200.
    If CkRest::ckResponseStatusCode(rest) <> 200
        Debug "response status code = " + Str(CkRest::ckResponseStatusCode(rest))
        Debug "response status text = " + CkRest::ckResponseStatusText(rest)
        Debug "response header: " + CkRest::ckResponseHeader(rest)
        Debug "response body: " + responseXml
        CkRest::ckDispose(rest)
        CkAuthAws::ckDispose(authAws)
        ProcedureReturn
    EndIf

    ; Examine the successful XML response.
    xml.i = CkXml::ckCreate()
    If xml.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf

    CkXml::ckLoadXml(xml,responseXml)
    Debug CkXml::ckGetXml(xml)
    Debug "----"

    ; 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:
    Debug "Body: " + CkXml::ckChilkatPath(xml,"ReceiveMessageResult|Message|Body|*")
    Debug "MessageId: " + CkXml::ckChilkatPath(xml,"ReceiveMessageResult|Message|MessageId|*")

    unused.s = CkXml::ckChilkatPath(xml,"ReceiveMessageResult|Message[0]|Attribute|$")

    rec.i = CkXml::ckFindNextRecord(xml,"Name","SenderId")
    Debug "SenderId: " + CkXml::ckGetChildContent(rec,"Value")
    CkXml::ckDispose(rec)

    rec = CkXml::ckFindNextRecord(xml,"Name","ApproximateFirstReceiveTimestamp")
    Debug "ApproximateFirstReceiveTimestamp: " + CkXml::ckGetChildContent(rec,"Value")
    CkXml::ckDispose(rec)

    rec = CkXml::ckFindNextRecord(xml,"Name","ApproximateReceiveCount")
    Debug "ApproximateReceiveCount: " + CkXml::ckGetChildContent(rec,"Value")
    CkXml::ckDispose(rec)

    rec = CkXml::ckFindNextRecord(xml,"Name","SentTimestamp")
    Debug "SentTimestamp: " + CkXml::ckGetChildContent(rec,"Value")
    CkXml::ckDispose(rec)

    CkXml::ckGetRoot2(xml)


    CkRest::ckDispose(rest)
    CkAuthAws::ckDispose(authAws)
    CkXml::ckDispose(xml)


    ProcedureReturn
EndProcedure