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Find the number you want to configure, hit 'Edit' and then enter the ngrok URL with /YOUR_PROJECT_NAME/inbound at the end. Sign into your Vonage account and go to Your Numbers. Now if you run gradle appRun, Jetty should start up and you're ready to configure your Vonage web-hook. Note that I've reconfigured the send-sms mapping so the url-pattern is now /send instead of the wildcard mapping it was before. In `src/main/java/getstarted/InboundSMSServlet.java', paste the following: package getstarted import rvlet.* import .* import public class InboundSMSServlet extends HttpServlet Īll the Servlet does is to print the received parameters to the console-useful for debugging! Now configure your web.xml with the following: inbound-sms getstarted.InboundSMSServlet send-sms /send inbound-sms /inbound So we need to write a small stub servlet first. What we'd like to do now is to configure Vonage to point to our Ngrok URL, but it won't do so unless the URL is returning 200 messages. Leave Ngrok running in a terminal window (it'll happily run until you shut it down), and we want to keep the URL and tunnel running for a while. You can see from the screenshot that Ngrok has allocated me the random URL, which is now tunneling to localhost:8080, where I'll be running Jetty in a moment.

Jetty uses the 8080 port by default, so we'll use that to make life easier. Once you've done that, run ngrok in your terminal: ngrok http 8080 When you run Ngrok, it creates a new subdomain of ngrok.io, and then it tunnels all requests to that domain name to a web service running on your machine.

Fortunately there is an excellent tool called Ngrok that can help us with this problem. The problem is that while we're developing on our local machine, we are likely to be firewalled from the internet, so Vonage's servers can't reach us! One way around this would be to continuously deploy to a public web server, but that is a complete pain. What we're going to do in this tutorial is write a Servlet that can handle the incoming SMS message.

When Vonage receives an SMS message on a Vonage number, it looks up the webhook endpoint (URL) associated with that number and calls that URL with a big blob of JSON describing the message that was just received. This tutorial builds on that, adding an endpoint that will be called by Vonage when someone sends an SMS message to your Vonage number. In the last tutorial, we set up a Java web app that can send SMS messages using Vonage SMS API.