Routing to inline handlers

It is possible in ASP.NET Core to handle a request directly, that is, to not route to a controller action. We define inline handlers by using an extension method that specifies the HTTP verb and the template to match, as follows:

• MapGet: HTTP Get
• MapPost: HTTP Post
• MapPut: HTTP Put
• MapDelete: HTTP Delete
• MapVerb: Any named HTTP verb; for example, Get is the same as using MapGet

There are actually two extension methods, MapXXX and MapXXXMiddleware, the first taking a delegate and the second a middleware class. An example follows.

These methods offer two possible signatures (except for Map<verb>, which takes the HTTP verb) and take the following parameters:

• pattern: This is a route template.
• requestHandler: This is a handler that takes the current context (HttpContext) and returns a task.

Here are two examples. In the...