init: 提交 files 服务初始代码

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/storage/client.go

@@ -0,0 +1,31 @@
+package storage
+
+import (
+	"time"
+
+	"git.apinb.com/ops/files/internal/config"
+	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
+	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss/credentials"
+)
+
+type Client struct {
+	client        *oss.Client
+	bucket        string
+	publicBaseURL string
+	presignTTL    time.Duration
+}
+
+func New(cfg config.ObjectStorageConf) (*Client, error) {
+	ossConfig := oss.LoadDefaultConfig().
+		WithRegion(cfg.Region).
+		WithEndpoint(cfg.Endpoint).
+		WithCredentialsProvider(credentials.NewStaticCredentialsProvider(cfg.AccessKeyID, cfg.AccessKeySecret)).
+		WithSignatureVersion(oss.SignatureVersionV4)
+
+	return &Client{
+		client:        oss.NewClient(ossConfig),
+		bucket:        cfg.Bucket,
+		publicBaseURL: cfg.PublicBaseURL,
+		presignTTL:    time.Duration(cfg.PresignTTLSeconds) * time.Second,
+	}, nil
+}