Macro http_router 

macro_rules! http_router {
    ($($method:tt $path:literal => $h:expr),*) => { ... };
    (@build $r:ident HEAD $path:literal => $h:expr) => { ... };
    (@build $r:ident GET $path:literal => $h:expr) => { ... };
    (@build $r:ident PUT $path:literal => $h:expr) => { ... };
    (@build $r:ident POST $path:literal => $h:expr) => { ... };
    (@build $r:ident PATCH $path:literal => $h:expr) => { ... };
    (@build $r:ident DELETE $path:literal => $h:expr) => { ... };
    (@build $r:ident OPTIONS $path:literal => $h:expr) => { ... };
    (@build $r:ident _ $path:literal => $h:expr) => { ... };
}

A macro to help with constructing a Router from method-pattern-handler triples.

Examples

fn handle_route(req: Request) -> Response {
    let router = http_router! {
        GET "/user" => list_users,
        POST "/user" => create_user,
        GET "/user/:id" => get_user,
        PUT "/user/:id" => update_user,
        DELETE "/user/:id" => delete_user,
        _ "/user" => method_not_allowed,
        _ "/user/:id" => method_not_allowed
    };
    router.handle(req)
}