Update dependencies and add unique UUID route

src/config.go

@@ -13,6 +13,7 @@ var (
 		Environment: "development",
 		Host:        "127.0.0.1",
 		Port:        3001,
+		AuthKey:     "",
 		Redis: RedisConfig{
 			Host:     "127.0.0.1",
 			Port:     6379,
@@ -95,6 +96,7 @@ type Config struct {
 	Environment string       `yaml:"environment"`
 	Host        string       `yaml:"host"`
 	Port        uint16       `yaml:"port"`
+	AuthKey     string       `yaml:"auth_key"`
 	Redis       RedisConfig  `yaml:"redis"`
 	Routes      RoutesConfig `yaml:"routes"`
 	Cache       CacheConfig  `yaml:"cache"`

src/redis.go

@@ -34,6 +34,23 @@ func (r *Redis) Connect(conf RedisConfig) error {
 	return c.Ping(ctx).Err()
 }
 
+// Scan returns all keys by the pattern in the Redis database.
+func (r *Redis) Scan(cursor uint64, pattern string) ([]string, uint64, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+
+	defer cancel()
+
+	res := r.conn.Scan(ctx, cursor, pattern, 25)
+
+	if err := res.Err(); err != nil {
+		return nil, 0, err
+	}
+
+	keys, newCursor := res.Val()
+
+	return keys, newCursor, nil
+}
+
 // GetString gets the value from Redis by the key and returns the value as a string.
 func (r *Redis) GetString(key string) (string, bool, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)

src/routes.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"net/http"
 	"strconv"
+	"strings"
 
 	"github.com/gofiber/fiber/v2"
 	"github.com/mineatar-io/skin-render"
@@ -11,6 +12,7 @@ import (
 
 func init() {
 	app.Get("/ping", PingHandler)
+	app.Get("/list", ListHandler)
 	app.Get("/skin/:uuid", SkinHandler)
 	app.Get("/face/:uuid", FaceHandler)
 	app.Get("/head/:uuid", HeadHandler)
@@ -27,6 +29,39 @@ func PingHandler(ctx *fiber.Ctx) error {
 	return ctx.SendStatus(http.StatusOK)
 }
 
+// ListHandler is the API handler used for the `/list` route.
+func ListHandler(ctx *fiber.Ctx) error {
+	authKey := ctx.Get("Authorization")
+
+	if len(authKey) < 1 {
+		return ctx.SendStatus(http.StatusUnauthorized)
+	}
+
+	if authKey != conf.AuthKey {
+		return ctx.SendStatus(http.StatusForbidden)
+	}
+
+	result := make([]string, 0)
+
+	for {
+		keys, cursor, err := r.Scan(0, "unique:*")
+
+		if err != nil {
+			return err
+		}
+
+		for _, uuid := range keys {
+			result = append(result, strings.TrimPrefix(uuid, "unique:"))
+		}
+
+		if cursor == 0 || len(keys) < 1 {
+			break
+		}
+	}
+
+	return ctx.JSON(result)
+}
+
 // FullBodyHandler is the API handler used for the `/body/full/:uuid` route.
 func FullBodyHandler(ctx *fiber.Ctx) error {
 	opts := ParseQueryParams(ctx, conf.Routes.FullBody)

src/util.go

@@ -96,6 +96,10 @@ func GetPlayerSkin(uuid string) (*image.NRGBA, bool, error) {
 		return skin.GetDefaultSkin(slim), slim, nil
 	}
 
+	if err = r.Set(fmt.Sprintf("unique:%s", textures.UUID), "0", 0); err != nil {
+		return nil, false, err
+	}
+
 	value := ""
 
 	for _, property := range textures.Properties {