Understanding and Testing Swagger
Explore how to configure and use Swagger with the Swashbuckle package to generate OpenAPI specifications for your ASP.NET Core web service. Learn to test API endpoints interactively with Swagger UI, handle HTTP requests like GET, POST, and DELETE, and understand response codes and error handling. This lesson equips you to document and validate your web services effectively.
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The most important part of Swagger is the OpenAPI Specification, which defines a REST-style contract for the API, detailing all its resources and operations in a human- and machine-readable format for easy development, discovery, and integration.
Developers can use the OpenAPI Specification for a Web API to automatically generate strongly typed client-side code in their preferred language or library. For us, another useful feature is Swagger UI because it automatically generates documentation for the API with built-in visual testing capabilities.
Swagger with Swashbuckle
Let’s review how Swagger is enabled for our web service using the Swashbuckle package:
Step 1: If the web service is running, shut down the web server.
Step 2: In Northwind.WebApi.csproj, note the package reference for Swashbuckle.AspNetCore, as shown in the following markup:
Step 3: In Program.cs, import Swashbuckle’s SwaggerUI namespace, as shown in the following code:
Step 4: In the section configuring the HTTP ...