Go

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. Go

    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.
    rest := chilkat.NewRest()
    bAutoReconnect := true
    success = rest.Connect("<yournamespace>.servicebus.windows.net",443,true,bAutoReconnect)
    if success != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        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";
    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.
    sbToken := chilkat.NewStringBuilder()
    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..
    sbPath := chilkat.NewStringBuilder()
    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.
    sbResponseBody := chilkat.NewStringBuilder()
    success = rest.FullRequestNoBodySb("DELETE",*sbPath.GetAsString(),sbResponseBody)
    if success != true {
        fmt.Println(rest.LastErrorText())
        rest.DisposeRest()
        sbToken.DisposeStringBuilder()
        sbPath.DisposeStringBuilder()
        sbResponseBody.DisposeStringBuilder()
        return
    }

    fmt.Println("Response Status Code = ", rest.ResponseStatusCode())

    // Check for a success response.
    if rest.ResponseStatusCode() != 200 {
        fmt.Println(rest.LastRequestStartLine())
        fmt.Println(rest.LastRequestHeader())
        fmt.Println(*sbResponseBody.GetAsString())
        fmt.Println("Failed.")
        rest.DisposeRest()
        sbToken.DisposeStringBuilder()
        sbPath.DisposeStringBuilder()
        sbResponseBody.DisposeStringBuilder()
        return
    }

    // If successful, the message is the contents of the response body.
    message := sbResponseBody.GetAsString()
    fmt.Println("Dequeued message: ", *message)

    fmt.Println("Success.")

    rest.DisposeRest()
    sbToken.DisposeStringBuilder()
    sbPath.DisposeStringBuilder()
    sbResponseBody.DisposeStringBuilder()