(Node.js) Azure Service Bus - Read Queued Message

See more Azure Service Bus Examples

Demonstrates read a message from an Azure Service Bus Queue. The message is received and removed from the queue.

For more information, see https://docs.microsoft.com/en-us/rest/api/servicebus/receive-and-delete-message-destructive-read

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // 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.
    var rest = new chilkat.Rest();
    var bAutoReconnect = true;
    var success = rest.Connect("<yournamespace>.servicebus.windows.net",443,true,bAutoReconnect);
    if (success !== true) {
        console.log(rest.LastErrorText);
        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..
    // ----------------------------------------------------------------------------------------------

    // Receive and delete a message from a queue named "gila";
    var queueName = "gila";

    // 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.
    var sbToken = new chilkat.StringBuilder();
    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());

    // Build the path..
    var sbPath = new chilkat.StringBuilder();
    sbPath.Append("/");
    sbPath.Append(queueName);
    sbPath.Append("/messages/head");

    // Add timeout and api-version query parameters.
    rest.AddQueryParam("timeout","20");
    rest.AddQueryParam("api-version","2013-08");

    // Use the DELETE HTTP verb to read the message at the head of the queue and remove it.
    var sbResponseBody = new chilkat.StringBuilder();
    success = rest.FullRequestNoBodySb("DELETE",sbPath.GetAsString(),sbResponseBody);
    if (success !== true) {
        console.log(rest.LastErrorText);
        return;
    }

    console.log("Response Status Code = " + rest.ResponseStatusCode);

    // Check for a success response.
    if (rest.ResponseStatusCode !== 200) {
        console.log(rest.LastRequestStartLine);
        console.log(rest.LastRequestHeader);
        console.log(sbResponseBody.GetAsString());
        console.log("Failed.");
        return;
    }

    // If successful, the message is the contents of the response body.
    var message = sbResponseBody.GetAsString();
    console.log("Dequeued message: " + message);

    console.log("Success.");

}

chilkatExample();