Chilkat Examples

ChilkatHOMEAndroid™Classic ASPCC++C#Mono C#.NET Core C#C# UWP/WinRTDataFlexDelphi ActiveXDelphi DLLVisual FoxProJavaLianjaMFCObjective-CPerlPHP ActiveXPHP ExtensionPowerBuilderPowerShellPureBasicCkPythonChilkat2-PythonRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++Visual Basic 6.0VB.NETVB.NET UWP/WinRTVBScriptXojo PluginNode.jsExcelGo

MFC Examples

Web API Categories

ASN.1
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Compression
DKIM / DomainKey
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
Socket/SSL/TLS
Spider
Stream
Tar Archive
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(MFC) Azure Service Bus - Peek-Lock Message (Non-Destructive Read)

See more Azure Service Bus Examples

Shows how to atomically retrieve and lock a message from a queue or subscription for processing. The message is guaranteed not to be delivered to other receivers (on the same queue or subscription only) during the lock duration specified in the queue/subscription description.

For more information, see https://docs.microsoft.com/en-us/rest/api/servicebus/peek-lock-message-non-destructive-read

Chilkat C/C++ Library Downloads

MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkRest.h>
#include <CkStringBuilder.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // Note: Requires Chilkat v9.5.0.65 or greater.

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

    // Make the initial connection.
    // A single REST object, once connected, can be used for many Azure Service Bus REST API calls.
    // The auto-reconnect indicates that if the already-established HTTPS connection is closed,
    // then it will be automatically re-established as needed.
    CkRest rest;
    bool bAutoReconnect = true;
    bool success = rest.Connect("<yournamespace>.servicebus.windows.net",443,true,bAutoReconnect);
    if (success != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // ----------------------------------------------------------------------------------------------
    // The code above this comment could be placed inside a function/subroutine within the application
    // because the connection does not need to be made for every request.  Once the connection is made
    // the app may send many requests..
    // ----------------------------------------------------------------------------------------------

    // Let's load a previously computed SAS token and use it.
    // See Azure Shared Access Signature for an example to genenerate an Azure SAS token.
    CkStringBuilder sbToken;
    sbToken.LoadFile("qa_data/tokens/serviceBusSas.txt","utf-8");

    // Tell the REST object to use the Azure Shared Access Signature for authorization.
    sbToken.Prepend("SharedAccessSignature ");
    rest.AddHeader("Authorization",sbToken.getAsString());

    // ----------------------------------------------------------------------------------------------

    // Peek-lock a message from the subscription "feedings" in the topic "gilaMonster"
    const char *topicName = "gilaMonster";
    const char *subscriptionName = "feedings";

    // Build the path..
    CkStringBuilder sbPath;
    sbPath.Append("/");
    sbPath.Append(topicName);
    sbPath.Append("/subscriptions/");
    sbPath.Append(subscriptionName);
    sbPath.Append("/messages/head");

    // If peek-locking from a queue, the path would be built like this:
    CkStringBuilder sbQueuePath;
    sbQueuePath.Append("/");
    sbQueuePath.Append("queueName");
    sbQueuePath.Append("/messages/head");
    // This example will use the sbPath..

    // Add a timeout parameter.
    rest.AddQueryParam("timeout","20");

    // Use the POST HTTP verb to peek-lock the message.
    // Note that the only difference between the destructive Read-and-Delete and the non-destructive Peek-Lock
    // is that the HTTP verb.  (POST is for peek-lock, DELETE is fore read-and-delete.)
    CkStringBuilder sbResponseBody;
    success = rest.FullRequestNoBodySb("POST",sbPath.getAsString(),sbResponseBody);
    if (success != true) {
        strOut.append(rest.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append("Response Status Code = ");
    strOut.appendInt(rest.get_ResponseStatusCode());
    strOut.append("\r\n");

    // Check for a success response.
    // CAREFUL: This returns a 201 response instead of a 200 response.  In general, either 200 or 201 should always indicate success.
    if (rest.get_ResponseStatusCode() != 201) {
        strOut.append(rest.lastRequestStartLine());
        strOut.append("\r\n");
        strOut.append(rest.lastRequestHeader());
        strOut.append("\r\n");
        strOut.append(sbResponseBody.getAsString());
        strOut.append("\r\n");
        strOut.append("Failed.");
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    // The content of the message is returned in the HTTP response body.
    // The HTTP response headers contains extra information.  For example:
    CkJsonObject jsonBrokerProps;
    jsonBrokerProps.Load(rest.responseHdrByName("BrokerProperties"));
    jsonBrokerProps.put_EmitCompact(false);
    strOut.append(jsonBrokerProps.emit());
    strOut.append("\r\n");

    // An example of the BrokerProperties JSON that is returned:

    // 	{
    // 	  "DeliveryCount": 2,
    // 	  "EnqueuedSequenceNumber": 3000003,
    // 	  "EnqueuedTimeUtc": "Wed, 07 Dec 2016 17:42:48 GMT",
    // 	  "Label": "M2",
    // 	  "LockToken": "0a13ee8a-be32-4458-89e0-5e1401caa6a0",
    // 	  "LockedUntilUtc": "Wed, 07 Dec 2016 18:13:12 GMT",
    // 	  "MessageId": "7bea513a6ddb49089e07bfbee26d85bd",
    // 	  "SequenceNumber": 3,
    // 	  "State": "Active",
    // 	  "TimeToLive": 922337203685.47754
    // 	}

    // Also the "Location" response header contains the URI of the locked message.
    // This can be used to ulock or delete the message.
    strOut.append("Location: ");
    strOut.append(rest.responseHdrByName("Location"));
    strOut.append("\r\n");

    // An example of the Location URI:
    // https://chilkat.servicebus.windows.net/gilamonster/subscriptions/feedings/messages/3/0a13ee8a-be32-4458-89e0-5e1401caa6a0

    // If successful, the message is the contents of the response body.
    const char *message = sbResponseBody.getAsString();
    strOut.append("Received message: ");
    strOut.append(message);
    strOut.append("\r\n");

    strOut.append("Success.");
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }

 

© 2000-2022 Chilkat Software, Inc. All Rights Reserved.