Hi Folks! In this post I will show you how to retrieve the user's weather forecast information from their IP address in a .NET7 application, using dependency injections and a custom middleware. The IP GeoLocation service layer in the sample application will be responsible for retrieving the user's physical location (and that's why you need to register yourself on IpInfoDb to get an API key). Then the Weather Forecast service layer with the location in hand will lookup for the user's weather forecast information (again, you will need to sign up for an API key on OpenWeatherMap).

Clone the github repository here. But don't forget to checkout a branch called weather.

There's currently 2 weather providers in the solution: ForecastIO and OpenWeatherMap. If you decide to also take advantage of using ForecastIO, you will need to go to their website and register yourself for an API key.

This application follows the same logic as the one in [.NET7] IP GeoLocation with Dependency Injection and Custom Middleware. It registers a middleware called WeatherMiddleware that will be responsible for choosing the best instance of the weather service and then retrieving the weather information.

Open the NET7-IPGeolocation.sln solution file and head to the Services.WeatherForecast project. You should see a class called Concrete/OpenWeatherMap.

Well, the best way to understand the application would be to run it (after getting the API keys, of course). Put a breakpoint in the Forecast method of the concrete classes inside the Services.WeatherForecast project, and another one at the weather middleware (InvokeAsync method).

You should see an output like this one (your location and weather):

Feel free to ask any questions you might have in the comment section below, I will do my best to answer them.

Hope you guys enjoyed it. See ya!