(JavaScript) Azure Service Bus - Receive and Delete Message from Subscription

See more Azure Service Bus Examples

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

// 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 CkRest();
var bAutoReconnect = true;
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..
// ----------------------------------------------------------------------------------------------

// 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 CkStringBuilder();
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());

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

// Receive a message from the subscription "feedings" in the topic "gilaMonster"
var topicName = "gilaMonster";
var subscriptionName = "feedings";

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

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

// Use the DELETE HTTP verb to read the message at the head of the queue and remove it.
var sbResponseBody = new CkStringBuilder();
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("Received message: " + message);

console.log("Success.");