oss请求处理

backend/internal/assets/oss.go

@@ -9,6 +9,7 @@ import (
 	"net/url"
 	"path"
 	"strings"
+	"time"
 )
 
 const OSSACLPublicRead = "public-read"
@@ -37,6 +38,10 @@ type OSSClient interface {
 	Delete(context.Context, OSSObjectRequest) error
 }
 
+type OSSURLSigner interface {
+	SignGetURL(OSSObjectRequest, time.Duration) (string, error)
+}
+
 type OSSError struct {
 	Status int
 	Code   string
@@ -116,6 +121,17 @@ func (s *OSS) Delete(ctx context.Context, key string) error {
 	return mapOSSError(err)
 }
 
+func (s *OSS) SignReadURL(key string, ttl time.Duration) (string, error) {
+	if err := validOSSKey(key); err != nil {
+		return "", err
+	}
+	signer, ok := s.client.(OSSURLSigner)
+	if !ok {
+		return "", errors.New("OSS client does not support signed URLs")
+	}
+	return signer.SignGetURL(OSSObjectRequest{Endpoint: s.config.PublicBaseURL, Bucket: s.config.Bucket, Key: key}, ttl)
+}
+
 type ossOperationDiagnostic struct {
 	Operation  string
 	Status     int
@@ -182,3 +198,4 @@ func escapeOSSKey(key string) string {
 }
 
 var _ BlobStore = (*OSS)(nil)
+var _ BlobURLSigner = (*OSS)(nil)