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Saunter is an AsyncAPI documentation generator for dotnet.

See examples/StreetlightsAPI.

1. Install the Saunter package

   dotnet add package Saunter
   

2. In the ConfigureServices method of Startup.cs, configure Saunter.

   // Add Saunter to the application services. 
   services.AddAsyncApiSchemaGeneration(options =>
   {
       // Specify example type(s) from assemblies to scan.
       options.AssemblyMarkerTypes = new[] {typeof(StreetlightMessageBus)};
   
       // Build as much (or as little) of the AsyncApi document as you like.
       // Saunter will generate Channels, Operations, Messages, etc, but you
       // may want to specify Info here.
       options.AsyncApi = new AsyncApiDocument
       {
           Info = new Info("Streetlights API", "1.0.0")
           {
               Description = "The Smartylighting Streetlights API allows you\nto remotely manage the city lights.",
               License = new License("Apache 2.0")
               {
                   Url = "https://www.apache.org/licenses/LICENSE-2.0"
               }
           },
           Servers =
           {
               { "mosquitto", new Server("test.mosquitto.org", "mqtt") }
           }
       };
   });

3. Add attributes to your classes which publish or subscribe to messages.

   [AsyncApi] // Tells Saunter to scan this class.
   public class StreetlightMessageBus : IStreetlightMessageBus
   {
       [Channel("publish/light/measured")] // Creates a Channel
       [PublishOperation(typeof(LightMeasuredEvent), Summary = "Inform about environmental lighting conditions for a particular streetlight.")] // A simple Publish operation.
       public void PublishLightMeasuredEvent(Streetlight streetlight, int lumens) {}

4. Add saunter middleware to host the AsyncApi json document. In the Configure method of Startup.cs:

   app.UseEndpoints(endpoints =>
   {
       endpoints.MapAsyncApiDocuments();
   });

5. Use the published AsyncApi document:

   // HTTP GET /asyncapi/asyncapi.json
   {
       // Properties from Startup.cs
       "asyncapi": "2.0.0",
       "info": {
           "title": "Streetlights API",
           "version": "1.0.0",
           "description": "The Smartylighting Streetlights API allows you\nto remotely manage the city lights.",
          // ...
       },
       // Properties generated from Attributes
       "channels": {
           "light/measured": {
           "publish": {
               "operationId": "PublishLightMeasuredEvent",
               "summary": "Inform about environmental lighting conditions for a particular streetlight.",
           //...
   }

See our contributing guide.

Feel free to get involved in the project by opening issues, or submitting pull requests.

• This project is heavily inspired by Swashbuckle.
• We use Namotion.Reflection for pulling xml documentation.
• And Newtonsoft.Json for serialization.