feat: 添加了redis缓存

internal/redis/cache.go

@@ -0,0 +1,63 @@
+package redis
+
+import (
+	"context"
+	"os"
+	"strconv"
+	"time"
+
+	redis "github.com/redis/go-redis/v9"
+)
+
+type Client struct {
+	rdb *redis.Client
+}
+
+func NewFromEnv() (*Client, error) {
+	addr := os.Getenv("REDIS_ADDR")
+	if addr == "" {
+		addr = "127.0.0.1:6379"
+	}
+
+	db := 0
+	if v := os.Getenv("REDIS_DB"); v != "" {
+		n, err := strconv.Atoi(v)
+		if err != nil {
+			return nil, err
+		}
+		db = n
+	}
+
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     addr,
+		Password: os.Getenv("REDIS_PASSWORD"),
+		DB:       db,
+	})
+	return &Client{rdb: rdb}, nil
+}
+
+func (c *Client) Close() error {
+	if c == nil || c.rdb == nil {
+		return nil
+	}
+	return c.rdb.Close()
+}
+
+func (c *Client) Ping(ctx context.Context) error {
+	if c == nil || c.rdb == nil {
+		return nil
+	}
+	return c.rdb.Ping(ctx).Err()
+}
+
+func (c *Client) GetBytes(ctx context.Context, key string) ([]byte, error) {
+	return c.rdb.Get(ctx, key).Bytes()
+}
+
+func (c *Client) SetBytes(ctx context.Context, key string, value []byte, ttl time.Duration) error {
+	return c.rdb.Set(ctx, key, value, ttl).Err()
+}
+
+func IsMiss(err error) bool {
+	return err == redis.Nil
+}