expose http.Handler and hide mux router

cmd/asynqmon/main.go

@@ -5,13 +5,13 @@ import (
 	"embed"
 	"flag"
 	"fmt"
+	"github.com/gorilla/mux"
 	"log"
 	"net/http"
 	"strings"
 	"time"
 
 	"github.com/go-redis/redis/v7"
-	"github.com/gorilla/mux"
 	"github.com/rs/cors"
 
 	"github.com/hibiken/asynq"
@@ -117,23 +117,23 @@ func main() {
 	}
 	defer redisClient.Close()
 
-	router := asynqmon.NewRouter(asynqmon.RouterOptions{
+	h := asynqmon.NewHandler(asynqmon.HandlerOptions{
 		Inspector:   inspector,
 		Middlewares: []mux.MiddlewareFunc{loggingMiddleware},
 		RedisClient: redisClient,
+		StaticContentHandler: asynqmon.NewStaticContentHandler(
+			staticContents,
+			"ui-assets",
+			"index.html",
+		),
 	})
 
-	router.PathPrefix("/").
-		Handler(asynqmon.NewStaticContentHandler(staticContents, "ui-assets", "index.html"))
-
 	c := cors.New(cors.Options{
 		AllowedMethods: []string{"GET", "POST", "DELETE"},
 	})
 
-	handler := c.Handler(router)
-
 	srv := &http.Server{
-		Handler:      handler,
+		Handler:      c.Handler(h),
 		Addr:         fmt.Sprintf(":%d", flagPort),
 		WriteTimeout: 10 * time.Second,
 		ReadTimeout:  10 * time.Second,

handler.go

@@ -3,18 +3,20 @@ package asynqmon
 import (
 	"github.com/go-redis/redis/v7"
 	"github.com/gorilla/mux"
+	"net/http"
 
 	"github.com/hibiken/asynq"
 )
 
-type RouterOptions struct {
-	RedisClient   redis.UniversalClient
-	Inspector     *asynq.Inspector
-	Middlewares   []mux.MiddlewareFunc
-	BytesStringer BytesStringer
+type HandlerOptions struct {
+	RedisClient          redis.UniversalClient
+	Inspector            *asynq.Inspector
+	Middlewares          []mux.MiddlewareFunc
+	BytesStringer        BytesStringer
+	StaticContentHandler http.Handler
 }
 
-func NewRouter(opts RouterOptions) *mux.Router {
+func NewHandler(opts HandlerOptions) http.Handler {
 	router := mux.NewRouter()
 	inspector := opts.Inspector
 	t := &transformer{bs: defaultBytesStringer}
@@ -98,5 +100,7 @@ func NewRouter(opts RouterOptions) *mux.Router {
 		api.HandleFunc("/redis_info", newRedisInfoHandlerFunc(c)).Methods("GET")
 	}
 
+	api.Handle("/", opts.StaticContentHandler)
+
 	return router
 }