Lua Requires Chilkat v9.5.0.65+

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. Lua

local chilkat = require("chilkat")

-- 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.
local rest = chilkat.Rest.new()
local bAutoReconnect = true
local success = rest:connect("<yournamespace>.servicebus.windows.net", 443, true, bAutoReconnect)
if not success then
    print(rest.last_error_text)
    return
end

-- ----------------------------------------------------------------------------------------------
-- 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.
local sbToken = chilkat.StringBuilder.new()
sbToken:load_file("qa_data/tokens/serviceBusSas.txt", "utf-8")

-- Tell the REST object to use the Azure Shared Access Signature for authorization.
sbToken:prepend("SharedAccessSignature ")
rest:add_header("Authorization", sbToken:get_as_string())

-- ----------------------------------------------------------------------------------------------

-- Receive a message from the subscription "feedings" in the topic "gilaMonster"
local topicName = "gilaMonster"
local subscriptionName = "feedings"

-- Build the path..
local sbPath = chilkat.StringBuilder.new()
sbPath:append("/")
sbPath:append(topicName)
sbPath:append("/subscriptions/")
sbPath:append(subscriptionName)
sbPath:append("/messages/head")

-- Add a timeout parameter.
rest:add_query_param("timeout", "20")

-- Use the DELETE HTTP verb to read the message at the head of the queue and remove it.
local sbResponseBody = chilkat.StringBuilder.new()
success = rest:full_request_no_body_sb("DELETE", sbPath:get_as_string(), sbResponseBody)
if not success then
    print(rest.last_error_text)
    return
end

print("Response Status Code = " .. rest.response_status_code)

-- Check for a success response.
if rest.response_status_code ~= 200 then
    print(rest.last_request_start_line)
    print(rest.last_request_header)
    print(sbResponseBody:get_as_string())
    print("Failed.")
    return
end

-- If successful, the message is the contents of the response body.
local message = sbResponseBody:get_as_string()
print("Received message: " .. message)

print("Success.")