router: need a better way to match on request extensions

[slogsdon]

caused by a route path with a capture and an extension at end of path.

Example:

/users/:user_id
/users/:user_id.json
/users/:user_id.xml

[slogsdon]

Current dependence on Plug for route param parsing and Erlang's inability to pattern match binaries like param <> ".ext" makes this difficult to handle at compile time without rewriting a good amount of code.

Optimal solution at this point will probably be a plug to be early in the call stack, parsing the last captured param for an extension/MIME-type, setting Accept header, and removing the extension

😕