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

See more Azure Service Bus Examples

Shows how to receive and delete a message from an Azure service bus topic subscription.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

// 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.
Dim rest As New Chilkat.Rest
Dim bAutoReconnect As Boolean
bAutoReconnect = True
Dim success As Boolean
success = rest.Connect("<yournamespace>.servicebus.windows.net",443,True,bAutoReconnect)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

// ----------------------------------------------------------------------------------------------
// 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.
Dim sbToken As New Chilkat.StringBuilder
success = sbToken.LoadFile("qa_data/tokens/serviceBusSas.txt","utf-8")

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

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

// Receive a message from the subscription "feedings" in the topic "gilaMonster"
Dim topicName As String
topicName = "gilaMonster"
Dim subscriptionName As String
subscriptionName = "feedings"

// Build the path..
Dim sbPath As New Chilkat.StringBuilder
success = sbPath.Append("/")
success = sbPath.Append(topicName)
success = sbPath.Append("/subscriptions/")
success = sbPath.Append(subscriptionName)
success = sbPath.Append("/messages/head")

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

// Use the DELETE HTTP verb to read the message at the head of the queue and remove it.
Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestNoBodySb("DELETE",sbPath.GetAsString(),sbResponseBody)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

System.DebugLog("Response Status Code = " + Str(rest.ResponseStatusCode))

// Check for a success response.
If (rest.ResponseStatusCode <> 200) Then
    System.DebugLog(rest.LastRequestStartLine)
    System.DebugLog(rest.LastRequestHeader)
    System.DebugLog(sbResponseBody.GetAsString())
    System.DebugLog("Failed.")
    Return
End If

// If successful, the message is the contents of the response body.
Dim message As String
message = sbResponseBody.GetAsString()
System.DebugLog("Received message: " + message)

System.DebugLog("Success.")