Lecture 21: Defining Custom Routes in GET Methods

REST API Development: Build, Test, Troubleshoot

In REST API development, GET methods are used to retrieve resources. While standard GET routes allow basic retrieval by ID or listing all items, defining custom routes gives your API more flexibility and power.

Why Use Custom GET Routes?

Custom routes enable clients to access specific data or perform complex queries without requiring multiple filtering steps on the client side.

• Provide endpoints for specific queries
• Organize resources in a logical structure
• Reduce client-side filtering and data processing
• Enhance API usability and clarity

Example: Custom GET Route

Suppose you have a products API. A custom route can return only active products in a category:

Here, active and electronics are part of the route, allowing the server to return filtered data directly.

Implementing Custom Routes in ASP.NET Core

In ASP.NET Core, you can define custom GET routes using attribute routing:

This approach maps the URL /api/products/active/electronics to the GetActiveProducts method automatically.

Best Practices

• Keep routes intuitive and descriptive
• Use nouns for resources and avoid verbs in route names
• Document all custom routes clearly for API users
• Ensure route parameters are validated

Conclusion

Defining custom routes in GET methods makes your REST API more flexible and easier for clients to consume. It allows the server to handle complex queries efficiently and keeps the API structure organized and logical.