Resolving URIs to handlers

[robjtede]

e### Motivation Make it easier to support more complex and interconnected REST APIs by matching paths to the resource tree from inside a handler.

Proposal

Effectively we need a method like:

impl HttpRequest {
  fn match_path(&self, path: &str) -> Option<Path<Url>>;
}

that matches path against the resource map tree and returns a Path with filled in dynamic segments.

Discussed in https://github.com/actix/actix-web/discussions/2559

^{Originally posted by sazzer December 31, 2021} Hi there,

The existence of HttpRequest::url_for is fantastic for building real REST APIs. I can use this to generate URIs for other resources so that I can correctly generate the hypermedia graph.

However, what I can't quite work out how to do is the opposite. To take a URL that was was provided to me and convert it back into the details of what it resolves to.

If I understand it right, I can use HttpRequest::resource_map().match_name() to get the name of the handler that matches a given URL, but this doesn't give me the binds.

For example, if I had:

    config.service(
        web::resource("/users/{id}")
            .name("users_user_by_id")
            .route(web::get().to(get::handler)),
    );

Then I could use req.resource_map().match_name("http://localhost:8000/users/abc") to get Some("users_user_by_id"), but that would not tell me that the {id} bind was assigned the value "abc".

Is there any way to get this full expansion?

Cheers

[TimoCak]

Hi @robjtede,

i would like to see if i can find any solution for that issue. Could you assign that to me.

Cheers