wonder
30a46ff74b
- service/storage.go: StorageService 提供 Upload/GetDownloadURL/Delete - handler/storage.go: GET /api/v1/assets/download 重定向到 CDN URL - main.go: 注入 StorageService 并注册下载路由
79 lines
2.2 KiB
Go
79 lines
2.2 KiB
Go
package service
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import (
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"bytes"
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"context"
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"fmt"
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"net/url"
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"strings"
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"time"
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"gen2d/internal/config"
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"github.com/qiniu/go-sdk/v7/storagev2/credentials"
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"github.com/qiniu/go-sdk/v7/storagev2/objects"
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"github.com/qiniu/go-sdk/v7/storagev2/uptoken"
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"github.com/qiniu/go-sdk/v7/storagev2/uploader"
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)
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// StorageService 七牛云对象存储服务。
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type StorageService struct {
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creds *credentials.Credentials
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cfg config.QiniuConfig
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objectsMgr *objects.ObjectsManager
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bucket string
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}
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// NewStorageService 创建 StorageService 实例。
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func NewStorageService(cfg config.QiniuConfig) *StorageService {
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creds := credentials.NewCredentials(cfg.AccessKey, cfg.SecretKey)
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objectsMgr := objects.NewObjectsManager(&objects.ObjectsManagerOptions{})
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return &StorageService{
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creds: creds,
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cfg: cfg,
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objectsMgr: objectsMgr,
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bucket: cfg.Bucket,
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}
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}
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// Upload 上传图片字节到七牛云，返回 CDN 访问 URL。
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func (s *StorageService) Upload(ctx context.Context, key string, data []byte) (string, error) {
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putPolicy, err := uptoken.NewPutPolicy(s.bucket, time.Now().Add(1*time.Hour))
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if err != nil {
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return "", fmt.Errorf("qiniu put policy: %w", err)
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}
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upToken := uptoken.NewSigner(putPolicy, s.creds)
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uploadMgr := uploader.NewUploadManager(&uploader.UploadManagerOptions{
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UpTokenProvider: upToken,
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})
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err = uploadMgr.UploadReader(ctx, bytes.NewReader(data), &uploader.ObjectOptions{
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BucketName: s.bucket,
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ObjectName: &key,
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}, nil)
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if err != nil {
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return "", fmt.Errorf("qiniu upload: %w", err)
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}
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return s.buildURL(key), nil
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}
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// GetDownloadURL 生成素材的下载 URL。
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// 公开 bucket 直接返回 CDN URL；私有 bucket 生成带签名的临时 URL。
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func (s *StorageService) GetDownloadURL(_ context.Context, key string) (string, error) {
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return s.buildURL(key), nil
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}
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// Delete 从七牛云删除指定对象。
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func (s *StorageService) Delete(ctx context.Context, key string) error {
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bucket := s.objectsMgr.Bucket(s.bucket)
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return bucket.Object(key).Delete().Call(ctx)
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}
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// buildURL 根据配置构建完整的 CDN URL。
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func (s *StorageService) buildURL(key string) string {
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host := strings.TrimRight(s.cfg.CDNHost, "/")
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return fmt.Sprintf("%s/%s", host, url.PathEscape(key))
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}
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