WebApi2 - UrlEncoded uri as uri segment / controller action parameter

Question

I have a need to pass a uri as a route param to a webapi action method:

http://some.url/api/controller/method/%2FforeignRoute%2F7e12cd15-d49d-4b16-9fe5-94b5f3ea3ecd%2Fhello%2Fworld%2FsomeResourceId

.. which would map to an attribute route definition:

Route("api/controller/method/{theuri}")

.. but the final segment is always being decoded and asp.net/webapi returns a 404.

This doesn't feel like it should be an issue, but perhaps I'm barking up the wrong tree?

Answer 1

The URL Encoded value of %2F is the Forward Slash / and thus your uri becomes

http://some.url/api/controller/method//foreignRoute/7e12cd15-d49d-4b16-9fe5-94b5f3ea3ecd/hello/world/someResourceId
                                     ^^

double slash is creating the problem here. which is not available and you get the 404. You should change it to

Route("api/controller/method{theuri}")