Trailing slash in subrouter

[pboguslawski]

When using chi wrapper with subrouter defined in separate package like this...

main.go:
[...]
r.Route("/items", items.Route)
[...]

items/items.go:
[...]
func Route(r chi.Router) {
	r.Method(http.MethodGet, "/", nethttp.NewHandler(list()))
[...]

...it is possible to call it with or without trailing slash i.e. /items and /items/ both work ok.

In such scenario openapi.json contains trailing slash. Is it possible to use url without trailing slash for openapi.json generation in such scenario? How?

[vearutop]

Hello, it is possible with additional wrap that overrides route info of a handler, please check an example:

package main

import (
	"context"
	"fmt"
	"log"
	"net/http"

	"github.com/go-chi/chi/v5"
	"github.com/swaggest/assertjson"
	"github.com/swaggest/rest"
	"github.com/swaggest/rest/chirouter"
	"github.com/swaggest/rest/nethttp"
	"github.com/swaggest/rest/web"
	swgui "github.com/swaggest/swgui/v4emb"
	"github.com/swaggest/usecase"
)

func dummy() usecase.Interactor {
	return usecase.NewInteractor(func(ctx context.Context, input struct{}, output *struct{}) error {
		println("dummy")
		return nil
	})
}

func main() {
	service := web.DefaultService()

	service.Route("/test", func(r chi.Router) {
		r.(*chirouter.Wrapper).Wrap(func(handler http.Handler) http.Handler {
			var h rest.HandlerWithRoute
			if nethttp.HandlerAs(handler, &h) {
				if h.RoutePattern() == "/test/" {
					handler = nethttp.HandlerWithRouteMiddleware(h.RouteMethod(), "/test")(handler)
				}

				// Or a more general trimmer.
				//handler = nethttp.HandlerWithRouteMiddleware(h.RouteMethod(), strings.TrimRight(h.RoutePattern(), "/"))(handler)
			}

			return handler
		})
		r.Method(http.MethodGet, "/", nethttp.NewHandler(dummy()))
	})

	spec, _ := assertjson.MarshalIndentCompact(service.OpenAPI, "", " ", 80)
	fmt.Println(string(spec))

	service.Docs("/docs", swgui.New)
	fmt.Println("Swagger UI at http://localhost:8010/docs.")
	if err := http.ListenAndServe("localhost:8010", service); err != nil {
		log.Fatal(err)
	}
}

{
 "openapi":"3.0.3","info":{"title":"","version":""},
 "paths":{
  "/test":{
   "get":{
    "summary":"Dummy","operationId":"dummy",
    "responses":{"204":{"description":"No Content"}}
   }
  }
 }
}

[pboguslawski]

Works fine, thank you.