(VB.NET) 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 .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

' 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 = True
Dim success As Boolean = rest.Connect("<yournamespace>.servicebus.windows.net",443,True,bAutoReconnect)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
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
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"
Dim topicName As String = "gilaMonster"
Dim subscriptionName As String = "feedings"

' Build the path..
Dim sbPath As New Chilkat.StringBuilder
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.
Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestNoBodySb("DELETE",sbPath.GetAsString(),sbResponseBody)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Response Status Code = " & rest.ResponseStatusCode)

' Check for a success response.
If (rest.ResponseStatusCode <> 200) Then
    Debug.WriteLine(rest.LastRequestStartLine)
    Debug.WriteLine(rest.LastRequestHeader)
    Debug.WriteLine(sbResponseBody.GetAsString())
    Debug.WriteLine("Failed.")
    Exit Sub
End If


' If successful, the message is the contents of the response body.
Dim message As String = sbResponseBody.GetAsString()
Debug.WriteLine("Received message: " & message)

Debug.WriteLine("Success.")