Unicode 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.
Chilkat Unicode C Downloads

Unicode C
#include <C_CkRestW.h>
#include <C_CkAuthAwsW.h>
#include <C_CkXmlW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkRestW rest;
    BOOL bTls;
    int port;
    BOOL bAutoReconnect;
    HCkAuthAwsW authAws;
    const wchar_t *responseXml;
    HCkXmlW xml;
    const wchar_t *unused;
    HCkXmlW rec;

    success = FALSE;

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

    rest = CkRestW_Create();

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

    // Provide AWS credentials for the REST call.
    authAws = CkAuthAwsW_Create();
    CkAuthAwsW_putAccessKey(authAws,L"AWS_ACCESS_KEY");
    CkAuthAwsW_putSecretKey(authAws,L"AWS_SECRET_KEY");
    // the region should match our URL above..
    CkAuthAwsW_putRegion(authAws,L"us-west-2");
    CkAuthAwsW_putServiceName(authAws,L"sqs");

    CkRestW_SetAuthAws(rest,authAws);

    CkRestW_AddQueryParam(rest,L"Action",L"ReceiveMessage");
    CkRestW_AddQueryParam(rest,L"MaxNumberOfMessages",L"5");
    CkRestW_AddQueryParam(rest,L"VisibilityTimeout",L"15");
    CkRestW_AddQueryParam(rest,L"AttributeName",L"All");
    CkRestW_AddQueryParam(rest,L"MessageAttributeName",L"All");

    // Use the actual path part of your SQS queue URL here:
    responseXml = CkRestW_fullRequestNoBody(rest,L"GET",L"/123456789123/chilkatTest");
    if (CkRestW_getLastMethodSuccess(rest) != TRUE) {
        wprintf(L"%s\n",CkRestW_lastErrorText(rest));
        CkRestW_Dispose(rest);
        CkAuthAwsW_Dispose(authAws);
        return;
    }

    // A successful response will have a status code equal to 200.
    if (CkRestW_getResponseStatusCode(rest) != 200) {
        wprintf(L"response status code = %d\n",CkRestW_getResponseStatusCode(rest));
        wprintf(L"response status text = %s\n",CkRestW_responseStatusText(rest));
        wprintf(L"response header: %s\n",CkRestW_responseHeader(rest));
        wprintf(L"response body: %s\n",responseXml);
        CkRestW_Dispose(rest);
        CkAuthAwsW_Dispose(authAws);
        return;
    }

    // Examine the successful XML response.
    xml = CkXmlW_Create();
    CkXmlW_LoadXml(xml,responseXml);
    wprintf(L"%s\n",CkXmlW_getXml(xml));
    wprintf(L"----\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:
    wprintf(L"Body: %s\n",CkXmlW_chilkatPath(xml,L"ReceiveMessageResult|Message|Body|*"));
    wprintf(L"MessageId: %s\n",CkXmlW_chilkatPath(xml,L"ReceiveMessageResult|Message|MessageId|*"));

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

    rec = CkXmlW_FindNextRecord(xml,L"Name",L"SenderId");
    wprintf(L"SenderId: %s\n",CkXmlW_getChildContent(rec,L"Value"));
    CkXmlW_Dispose(rec);

    rec = CkXmlW_FindNextRecord(xml,L"Name",L"ApproximateFirstReceiveTimestamp");
    wprintf(L"ApproximateFirstReceiveTimestamp: %s\n",CkXmlW_getChildContent(rec,L"Value"));
    CkXmlW_Dispose(rec);

    rec = CkXmlW_FindNextRecord(xml,L"Name",L"ApproximateReceiveCount");
    wprintf(L"ApproximateReceiveCount: %s\n",CkXmlW_getChildContent(rec,L"Value"));
    CkXmlW_Dispose(rec);

    rec = CkXmlW_FindNextRecord(xml,L"Name",L"SentTimestamp");
    wprintf(L"SentTimestamp: %s\n",CkXmlW_getChildContent(rec,L"Value"));
    CkXmlW_Dispose(rec);

    CkXmlW_GetRoot2(xml);


    CkRestW_Dispose(rest);
    CkAuthAwsW_Dispose(authAws);
    CkXmlW_Dispose(xml);

    }