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Delivery Receipts

You can verify that a message you sent using the Vonage SMS API reached your customer by requesting a delivery receipt from the carrier.

NOTE: Not all networks and countries support delivery receipts. You can check our knowledge base for some further information on what you might receive if your network does not support delivery receipts. For detailed information on delivery receipts see our documentation.

To access the delivery receipt, you need to:

NOTE: After you send a message there may be a delay before you receive the delivery receipt.

  • Node.js
  • Java
  • .NET
  • PHP
  • Python
  • Ruby

    • Prerequisites

    npm install express body-parser

    Create a file named dlr-express.js and add the following code:

    const app = require('express')()
const bodyParser = require('body-parser')

app.use(bodyParser.json())
app.use(bodyParser.urlencoded({ extended: true }))

    View full source

    Write the code

    Add the following to dlr-express.js:

    app
  .route('/webhooks/delivery-receipt')
  .get(handleDeliveryReceipt)
  .post(handleDeliveryReceipt)

function handleDeliveryReceipt(request, response) {
  const params = Object.assign(request.query, request.body)
  console.log(params)
  response.status(204).send()
}

app.listen(process.env.PORT || 3000)

    View full source

    Run your code

    Save this file to your machine and run it: 

    node dlr-express.js

    Prerequisites

    Add the following to `build.gradle`:

    compile 'com.vonage:client:6.2.0'
    compile 'com.sparkjava:spark-core:2.7.2'

    Write the code

    Add the following to the main method of the ReceiveDLR class:

    port(3000);

get("/webhooks/delivery-receipt", (req, res) -> {
    for (String param : req.queryParams()) {
        System.out.printf("%s: %s\n", param, req.queryParams(param));
    }
    res.status(204);
    return "";
});

post("/webhooks/delivery-receipt", (req, res) -> {
    // The body will be form-encoded or a JSON object:
    if (req.contentType().startsWith("application/x-www-form-urlencoded")) {
        for (String param : req.queryParams()) {
            System.out.printf("%s: %s\n", param, req.queryParams(param));
        }
    } else {
        System.out.println(req.body());
    }

    res.status(204);
    return "";
});

    View full source

    Run your code

    We can use the application plugin for Gradle to simplify the running of our application. Update your build.gradle with the following:

      apply plugin: 'application'
  mainClassName = project.hasProperty('main') ? project.getProperty('main') : ''

    Run the following gradle command to execute your application, replacing com.vonage.quickstart.sms with the package containing ReceiveDLR:

    gradle run -Pmain=com.vonage.quickstart.sms.ReceiveDLR

    Prerequisites

    Install-Package Vonage

    Create a file named SmsController.cs and add the following code:

    using Vonage.Messaging;
using Vonage.Utility;

    View full source

    Write the code

    Add the following to SmsController.cs:

    [HttpGet("webhooks/delivery-receipt")]
public async Task<IActionResult> DeliveryReceipt()
{
    var dlr = WebhookParser.ParseQuery<DeliveryReceipt>(Request.Query);
    Console.WriteLine($"Delivery receipt received for messages {dlr.MessageId} at {dlr.MessageTimestamp}");
    return NoContent();
}

    View full source

    Prerequisites

    composer require slim/slim:^3.8 vonage/client

    Create a file named index.php and add the following code:

    use \Psr\Http\Message\ServerRequestInterface as Request;
use \Psr\Http\Message\ResponseInterface as Response;

    View full source

    Add the following to index.php:

    $app = new \Slim\App;

    View full source

    Write the code

    Add the following to index.php:

    $handler = function (Request $request, Response $response) {
    $receipt = \Vonage\SMS\Webhook\Factory::createFromRequest($request);

    error_log(print_r($receipt, true));

    return $response->withStatus(204);
};

$app->map(['GET', 'POST'], '/webhooks/delivery-receipt', $handler);

$app->run();

    View full source

    Run your code

    Save this file to your machine and run it: 

    php -S localhost:3000 -t .

    Prerequisites

    pip install flask

    Create a file named dlr-flask.py and add the following code:

    from pprint import pprint
from flask import Flask, request

app = Flask(__name__)

    View full source

    Write the code

    Add the following to dlr-flask.py:

    @app.route('/webhooks/delivery-receipt', methods=['GET', 'POST'])
def delivery_receipt():
    if request.is_json:
        pprint(request.get_json())
    else:
        data = dict(request.form) or dict(request.args)
        pprint(data)

    return ('', 204)

app.run(port=3000)

    View full source

    Run your code

    Save this file to your machine and run it: 

    python dlr-flask.py

    Prerequisites

    gem install sinatra sinatra-contrib

    Create a file named delivery_receipt.rb and add the following code:

    require 'sinatra'
require 'sinatra/multi_route'
require 'json'

helpers do
  def parsed_body
     json? ? JSON.parse(request.body.read) : {}
  end

  def json?
    request.content_type == 'application/json'
  end
end

    View full source

    Write the code

    Add the following to delivery_receipt.rb:

    route :get, :post, '/webhooks/delivery-receipt' do
  puts params.merge(parsed_body)
  status 204
end

set :port, 3000

    View full source

    Run your code

    Save this file to your machine and run it: 

    ruby delivery_receipt.rb

    Configure the webhook endpoint in your Vonage Dashboard

    So that Vonage knows how to access your webhook, you must configure it in your Vonage account.

    In the code snippets, the webhook is located at /webhooks/delivery-receipt. If you are using Ngrok, the webhook you need to configure in your Vonage Dashboard API Settings page is of the form https://demo.ngrok.io/webhooks/delivery-receipt. Replace demo with the subdomain provided by Ngrok and enter your endpoint in the field labeled Webhook URL for Delivery Receipts:

    Try it out

    Send a message to a mobile number and, if the network supports it, you will receive a delivery receipt in the following format:

    {
  "err-code": "0",
  "message-timestamp": "2020-10-25 12:10:29",
  "messageId": "0B00000127FDBC63",
  "msisdn": "447700900000",
  "network-code": "23410",
  "price": "0.03330000",
  "scts": "1810251310",
  "status": "delivered",
  "to": "Vonage"
}

    NOTE: After you send a message there may be a delay before you receive the delivery receipt.

    More information

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