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acs-callautomation-devx

An exploration to use an async/await pattern for Azure Communication Services CallAutomation flows.

Limitation

This async/await pattern creates a sticky client-server relationship. If your service runs behind a load balancer and gets scaled out there is no guarantee that the same server instance receives the event to continue its flow. In this case you need to encode the server instance in the callback URL and use a routing mechanism to direct to the right server.

Prerequisites

  • An Azure Communication Services resource with a purchased phone number and created Communication identity

Run

  1. Run ngrok http https://localhost:7072 from a console, and note the ngrok url
  2. Fill out the appsettings.json with your Communication resource connection string, the owned phone number, the ngrok url as BaseUrl, and the communication identity
  3. Build and run the solution, which will open up the Swagger UI
  4. Use the Swagger UI's "Try it out" and post against the /current/run route with your (US or Canada) phone number in E.164 format or against the /eventAwaiter/run route. The newest API proposal can be found under /implicitEvents/run