fix: 初验针对修改

internal/storage/aliyun/upload.go

@@ -0,0 +1,37 @@
+package aliyun
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	"git.apinb.com/ops/files/internal/storage"
+	"github.com/aliyun/alibabacloud-oss-go-sdk-v2/oss"
+)
+
+func (c *Client) PrepareUpload(ctx context.Context, request storage.UploadRequest) (storage.UploadInstruction, error) {
+	if strings.TrimSpace(request.ObjectKey) == "" {
+		return storage.UploadInstruction{}, fmt.Errorf("对象键不能为空")
+	}
+	if strings.TrimSpace(request.ContentType) == "" {
+		return storage.UploadInstruction{}, fmt.Errorf("内容类型不能为空")
+	}
+
+	result, err := c.client.Presign(ctx, &oss.PutObjectRequest{
+		Bucket:          oss.Ptr(c.bucket),
+		Key:             oss.Ptr(request.ObjectKey),
+		ContentType:     oss.Ptr(request.ContentType),
+		ForbidOverwrite: oss.Ptr("true"),
+	}, oss.PresignExpires(time.Duration(c.presignTTL)*time.Second))
+	if err != nil {
+		return storage.UploadInstruction{}, fmt.Errorf("生成上传预签名: %w", err)
+	}
+
+	return storage.UploadInstruction{
+		Method:    result.Method,
+		URL:       result.URL,
+		Headers:   result.SignedHeaders,
+		ExpiresAt: result.Expiration,
+	}, nil
+}