first commit

server/internal/storage/tencent/factory.go

@@ -0,0 +1,60 @@
+// Package tencent provides a Tencent Cloud COS storage factory that delegates to the S3-compatible engine.
+// Tencent COS is fully S3-compatible; we auto-assemble the endpoint from region and appId.
+package tencent
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"backupx/server/internal/storage"
+	"backupx/server/internal/storage/s3"
+)
+
+// Config is the user-facing configuration for Tencent COS.
+type Config struct {
+	Region          string `json:"region"`
+	Bucket          string `json:"bucket"` // format: bucketname-appid
+	SecretID        string `json:"accessKeyId"`
+	SecretKey       string `json:"secretAccessKey"`
+	Endpoint        string `json:"endpoint"` // optional override
+}
+
+// Factory creates Tencent COS providers by composing the S3 engine.
+type Factory struct {
+	s3Factory s3.Factory
+}
+
+func NewFactory() Factory {
+	return Factory{s3Factory: s3.NewFactory()}
+}
+
+func (Factory) Type() storage.ProviderType { return storage.ProviderTypeTencentCOS }
+func (Factory) SensitiveFields() []string  { return []string{"accessKeyId", "secretAccessKey"} }
+
+func (f Factory) New(ctx context.Context, rawConfig map[string]any) (storage.StorageProvider, error) {
+	cfg, err := storage.DecodeConfig[Config](rawConfig)
+	if err != nil {
+		return nil, err
+	}
+
+	endpoint := strings.TrimSpace(cfg.Endpoint)
+	if endpoint == "" {
+		region := strings.TrimSpace(cfg.Region)
+		if region == "" {
+			return nil, fmt.Errorf("tencent cos region is required")
+		}
+		// Tencent COS S3-compatible endpoint format
+		endpoint = fmt.Sprintf("https://cos.%s.myqcloud.com", region)
+	}
+
+	s3Config := map[string]any{
+		"endpoint":        endpoint,
+		"region":          cfg.Region,
+		"bucket":          cfg.Bucket,
+		"accessKeyId":     cfg.SecretID,
+		"secretAccessKey": cfg.SecretKey,
+		"forcePathStyle":  false, // COS uses virtual-hosted style
+	}
+	return f.s3Factory.New(ctx, s3Config)
+}