try to fix int / str error

keydb_extension.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"net/http"
+	"strconv"
 	"time"
 
 	"github.com/caddyserver/caddy/v2"
@@ -19,7 +20,7 @@ func init() {
 type KeyDBHandler struct {
 	Address  string `json:"address"`
 	Password string `json:"password"`
-	DB       int    `json:"db"`
+	DB       string `json:"db"`
 	client   *redis.Client
 }
 
@@ -31,10 +32,14 @@ func (KeyDBHandler) CaddyModule() caddy.ModuleInfo {
 }
 
 func (h *KeyDBHandler) Provision(ctx caddy.Context) error {
+	db, err := strconv.Atoi(h.DB)
+	if err != nil {
+		return fmt.Errorf("invalid db value: %v", err)
+	}
 	h.client = redis.NewClient(&redis.Options{
 		Addr:     h.Address,
 		Password: h.Password,
-		DB:       h.DB,
+		DB:       db,
 	})
 	return nil
 }
@@ -89,4 +94,3 @@ var (
 	_ caddyhttp.MiddlewareHandler = (*KeyDBHandler)(nil)
 	_ caddyfile.Unmarshaler       = (*KeyDBHandler)(nil)
 )
-