How to Handle URLs with Special Characters in ASP.NET Web API 2 Routing?

Routing with Special Characters in MVC Web API 2

Problem:
Attempting to access resources using URLs containing special characters, such as dots (`.') in the path segment, results in a "HTTP Error 404.0 - Not Found" error.

Configuration:
The sample controller and WebApiConfig provided in the question:

// PeopleController.cs
public class PeopleController : ApiController
{
    // ...
}

// WebApiConfig.cs
public static void Register(HttpConfiguration config)
{
    // ...

    config.Routes.MapHttpRoute(name: "DefaultApi", 
        routeTemplate: "api/{controller}/{id}",
        defaults: new { id = RouteParameter.Optional }
    );
}

Solution:
To allow special characters in the path segment, such as dots, modify the WebApiConfig route as follows:

config.Routes.MapHttpRoute(name: "DefaultApi", 
    routeTemplate: "api/{controller}/{id}/{*path}",
    defaults: new { id = RouteParameter.Optional, path = RouteParameter.Optional }
);

This route template adds a catch-all route parameter named {*path} that captures any remaining path segments, including special characters like dots.

Example:

http://somedomain.com/api/people/staff.33311/

By appending a slash (/) to the end of the URL, the request can be routed to the controller action that handles the path segment, in this case staff.33311.

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