(Lianja) Azure Service Bus - Send Message to Topic

See more Azure Service Bus Examples

Example code showing how to send a message to an Azure Service Bus Topic.

Chilkat Lianja Extension Download Chilkat Lianja Extension

// 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.
loRest = createobject("CkRest")
llBAutoReconnect = .T.
llSuccess = loRest.Connect("<yournamespace>.servicebus.windows.net",443,.T.,llBAutoReconnect)
if (llSuccess <> .T.) then
    ? loRest.LastErrorText
    release loRest
    return
endif

// ----------------------------------------------------------------------------------------------
// 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.
loSbToken = createobject("CkStringBuilder")
loSbToken.LoadFile("qa_data/tokens/serviceBusSas.txt","utf-8")

// Tell the REST object to use the Azure Shared Access Signature for authorization.
loSbToken.Prepend("SharedAccessSignature ")
loRest.AddHeader("Authorization",loSbToken.GetAsString())

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

// The code for sending to a topic is identical to the code sending to a queue.
// The only difference is that a topic name (or topic path) is used instead of queue name/path.

// Send to a topic named "gilaMonster";
lcTopicName = "gilaMonster"

// The HTTP request body contains the content of the message sent to the topic.
loSbRequestBody = createobject("CkStringBuilder")
loSbRequestBody.Append("Hello, I'm a gila monster!")

// Build the path..
loSbPath = createobject("CkStringBuilder")
loSbPath.Append("/")
loSbPath.Append(lcTopicName)
loSbPath.Append("/messages")

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

// Standard brokered message properties are placed in a BrokerProperties HTTP header. 
// The broker properties must be serialized in JSON format. To specify a TimeToLive value of 3600 seconds 
// and to add a message label "M1" to the message..
loJson = createobject("CkJsonObject")
loJson.AppendInt("TimeToLive",3600)
loJson.AppendString("Label","A123")
loRest.AddHeader("BrokerProperties",loJson.Emit())

// To add custom properties, such as "Priority" and "Color"
loRest.AddHeader("Priority","High")
loRest.AddHeader("Color","pink")

loSbResponseBody = createobject("CkStringBuilder")
llSuccess = loRest.FullRequestSb("POST",loSbPath.GetAsString(),loSbRequestBody,loSbResponseBody)
if (llSuccess <> .T.) then
    ? loRest.LastErrorText
    release loRest
    release loSbToken
    release loSbRequestBody
    release loSbPath
    release loJson
    release loSbResponseBody
    return
endif

? "Response Status Code = " + str(loRest.ResponseStatusCode)

// Check for a success response.
if (loRest.ResponseStatusCode <> 201) then
    ? loRest.LastRequestStartLine
    ? loRest.LastRequestHeader
    ? loSbResponseBody.GetAsString()
    ? "Failed."
    release loRest
    release loSbToken
    release loSbRequestBody
    release loSbPath
    release loJson
    release loSbResponseBody
    return
endif

// If successful, the 201 response will have no response body.

? "Success."


release loRest
release loSbToken
release loSbRequestBody
release loSbPath
release loJson
release loSbResponseBody