Lua Requires Chilkat v9.5.0.65+

PayPal - Generate Invoice Number

See more PayPal Examples

Generates the next invoice number that is available to the user. Lua

local chilkat = require("chilkat")

-- This requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

-- Load our previously obtained access token. (see PayPal OAuth2 Access Token)
local jsonToken = chilkat.JsonObject.new()
jsonToken:load_file("qa_data/tokens/paypal.json")

-- Build the Authorization request header field value.
local sbAuth = chilkat.StringBuilder.new()
-- token_type should be "Bearer"
sbAuth:append(jsonToken:string_of("token_type"))
sbAuth:append(" ")
sbAuth:append(jsonToken:string_of("access_token"))

-- Make the initial connection.
-- A single REST object, once connected, can be used for many PayPal 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("api.sandbox.paypal.com", 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..
-- ----------------------------------------------------------------------------------------------

-- Clear the REST object of any headers or query params from previous requests.
rest:clear_all_headers()
rest:clear_all_query_params()

rest:add_header("Authorization", sbAuth:get_as_string())

-- Send the POST request with an emtpy body and get the JSON response.
local sbJsonRequest = chilkat.StringBuilder.new()
local sbJsonResponse = chilkat.StringBuilder.new()
success = rest:full_request_sb("POST", "/v1/invoicing/invoices/next-invoice-number", sbJsonRequest, sbJsonResponse)
if not success then
    print(rest.last_error_text)
    return
end

local json = chilkat.JsonObject.new()
json.emit_compact = false
json:load_sb(sbJsonResponse)

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

-- Did we get a 200 success response?
if rest.response_status_code ~= 200 then
    print(json:emit())
    print("Failed.")
    return
end

-- Sample JSON response is shown below.
print(json:emit())
print("----------------------")
print("Next invoice number: " .. json:string_of("number"))
print("success")

-- ------------------------------------------------
-- A sample JSON response:

--     {
--       "number": "0003"
--     }