(C) 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.

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#include <C_CkRest.h>
#include <C_CkAuthAws.h>
#include <C_CkXml.h>

void ChilkatSample(void)
    {
    HCkRest rest;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    BOOL success;
    HCkAuthAws authAws;
    const char *responseXml;
    HCkXml xml;
    const char *unused;
    HCkXml rec;

    // 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) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        return;
    }

    // A successful response will have a status code equal to 200.
    if (CkRest_getResponseStatusCode(rest) != 200) {
        printf("response status code = %d\n",CkRest_getResponseStatusCode(rest));
        printf("response status text = %s\n",CkRest_responseStatusText(rest));
        printf("response header: %s\n",CkRest_responseHeader(rest));
        printf("response body: %s\n",responseXml);
        CkRest_Dispose(rest);
        CkAuthAws_Dispose(authAws);
        return;
    }

    // Examine the successful XML response.
    xml = CkXml_Create();
    CkXml_LoadXml(xml,responseXml);
    printf("%s\n",CkXml_getXml(xml));
    printf("----\n");

    // 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:
    printf("Body: %s\n",CkXml_chilkatPath(xml,"ReceiveMessageResult|Message|Body|*"));
    printf("MessageId: %s\n",CkXml_chilkatPath(xml,"ReceiveMessageResult|Message|MessageId|*"));

    unused = CkXml_chilkatPath(xml,"ReceiveMessageResult|Message[0]|Attribute|$");

    rec = CkXml_FindNextRecord(xml,"Name","SenderId");
    printf("SenderId: %s\n",CkXml_getChildContent(rec,"Value"));
    CkXml_Dispose(rec);

    rec = CkXml_FindNextRecord(xml,"Name","ApproximateFirstReceiveTimestamp");
    printf("ApproximateFirstReceiveTimestamp: %s\n",CkXml_getChildContent(rec,"Value"));
    CkXml_Dispose(rec);

    rec = CkXml_FindNextRecord(xml,"Name","ApproximateReceiveCount");
    printf("ApproximateReceiveCount: %s\n",CkXml_getChildContent(rec,"Value"));
    CkXml_Dispose(rec);

    rec = CkXml_FindNextRecord(xml,"Name","SentTimestamp");
    printf("SentTimestamp: %s\n",CkXml_getChildContent(rec,"Value"));
    CkXml_Dispose(rec);

    CkXml_GetRoot2(xml);


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

    }