How to test AWS SNS locally?

Question

I want to use Amazon SNS service. And I want to have an ability to subscribe an http rest to SNS topic to receive notifications.

However locally my application has URL as localhost So it's impossible for me to test application behavior locally.

I found one article about using ngrok server, to use some public IP instead of local.

However it doesn't seem to be a good solution for me.

Do you have any ideas how I could have a working SNS subscriber locally?

Answer 1

You could also use ngrok to expose your localhost publicly.

They way it works is it creates a subdomain dynamically and tunnels all request to your machine on the desired port.

Picture this scenario, I have a nginx running on localhost:8080. I open my terminal and run ngrok 8080, it will take my terminal session and log my public url, like 'as78fh.ngrok.com'.

If I go on another computer, open the browser and navigate to as78fh.ngrok.com/register the request gets served from my localhost:8080/register through the tunnel back to the internet.

I use it for lots of tricky developments, like email webhooks, github integrations and, of course, amazon sns.

Answer 2

Take a look at one of fake SNS implementations in GitHub, such as s12v/sns:

Fake Amazon Simple Notification Service (SNS) for testing. Supports:

• Create/List/Delete topics
• Subscribe endpoint
• Publish message
• Subscription persistence
• Integrations with (Fake-)SQS, File, HTTP, RabbitMQ, Slack