748 lines
23 KiB
Go
748 lines
23 KiB
Go
package files
|
||
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import (
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"bytes"
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"context"
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"crypto/sha256"
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"fmt"
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"hash"
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"io"
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"time"
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||
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"telesrv/internal/domain"
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"telesrv/internal/store"
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"go.uber.org/zap"
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"golang.org/x/sync/singleflight"
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)
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// 上传分片上限：与 Telegram 客户端约定一致（单片 ≤512KB；分片总数有上限防止 OOM）。
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const (
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MaxUploadPartBytes = 524288 // 512KB
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MaxUploadParts = 8000 // 512KB * 8000 ≈ 4GB 理论上限，足够主路径媒体
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)
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const (
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DefaultUploadPartTTL = 24 * time.Hour
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DefaultUploadPartGCInterval = 30 * time.Minute
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DefaultUploadPartGCBatch = 10000
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DefaultUploadInFlightMaxBytes = int64(MaxUploadPartBytes) * int64(MaxUploadParts)
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DefaultUploadInFlightMaxParts = MaxUploadParts
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DefaultUploadInFlightMaxFiles = 64
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)
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// blobMetaCacheCapacity 是 location_key→FileBlob 元数据 LRU 容量（每项约百字节，约 13MB）。
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const blobMetaCacheCapacity = 1 << 16
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// 小文件热缓存只覆盖 sticker/reaction/thumbnail 一类不可变小 blob；大媒体继续分段读。
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const (
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blobBytesCacheMaxEntryBytes = 256 << 10 // 256KB
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blobBytesCacheMaxBytes = 64 << 20 // 64MB
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// stickerSetNegativeCacheTTL 是未找到贴纸集的负缓存有效期：未 seed 的 short_name 会被客户端
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// 反复 getStickerSet，这里短时缓存 not-found 短路掉 PG。短 TTL 保证运行时新增集合最多滞后这么久。
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stickerSetNegativeCacheTTL = 30 * time.Second
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)
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// Service 实现 upload 分片累积、blob 落盘、getFile 下载，并把上传文件组装成 Photo / Document。
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type Service struct {
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media store.MediaStore
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blobs BlobBackend
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uploadParts UploadPartBackend
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dc int
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log *zap.Logger
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thumbs VideoThumbnailer
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thumbsSet bool
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blobCache *blobMetaCache
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byteCache *blobBytesCache
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// blobMetaSF/blobBytesSF 合并对同一热 blob 的并发首次访问：否则每个并发 getFile 都各打
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// 一发 PG GetFileBlob + backend GetRange(热门贴纸/reaction/头像被大量用户同时拉时尤甚)。
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blobMetaSF singleflight.Group
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blobBytesSF singleflight.Group
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stickerSetCache *stickerSetFullCache
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stickerSetNegCache *stickerSetNegativeCache
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uploadQuota domain.UploadPartQuota
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mapTiles *mapTileProxy
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externalMedia *externalMediaFetcher
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webpage *webpageFetcher
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// effects 是消息发送特效目录(messages.getAvailableEffects)。全局静态,启动 seedEffects
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||
// 一次写入后只读,故无锁——与各 read-model 缓存一样在服务就绪前完成填充。
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// effectsHash 在 seed 时算一次,handler 直接比对返回 NotModified,无需每次 RPC 重算。
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effects []domain.AvailableEffect
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effectsHash int
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}
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// Option 配置 files 服务的可选能力。
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type Option func(*Service)
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// WithLogger 注入日志器。未注入时使用 no-op logger。
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func WithLogger(log *zap.Logger) Option {
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return func(s *Service) {
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if log != nil {
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s.log = log
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}
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}
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}
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// WithVideoThumbnailer 覆盖视频缩略图生成器。传 nil 可显式关闭服务端抽帧 fallback。
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func WithVideoThumbnailer(thumbnailer VideoThumbnailer) Option {
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return func(s *Service) {
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s.thumbs = thumbnailer
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s.thumbsSet = true
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}
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}
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// WithUploadPartQuota 覆盖用户级 in-flight 上传分片配额；字段 <=0 表示该维度不限制。
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func WithUploadPartQuota(quota domain.UploadPartQuota) Option {
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return func(s *Service) {
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s.uploadQuota = quota
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}
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}
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// NewService 创建 files 服务。dc 是本 server 的 DC id，写入新建 document/photo 的 dc_id。
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func NewService(media store.MediaStore, blobs BlobBackend, dc int, opts ...Option) *Service {
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||
s := &Service{
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media: media,
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blobs: blobs,
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dc: dc,
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log: zap.NewNop(),
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blobCache: newBlobMetaCache(blobMetaCacheCapacity),
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byteCache: newBlobBytesCache(blobBytesCacheMaxBytes),
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stickerSetCache: newStickerSetFullCache(),
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stickerSetNegCache: newStickerSetNegativeCache(stickerSetNegativeCacheTTL),
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uploadQuota: domain.UploadPartQuota{
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MaxBytes: DefaultUploadInFlightMaxBytes,
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MaxParts: DefaultUploadInFlightMaxParts,
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MaxFiles: DefaultUploadInFlightMaxFiles,
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},
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}
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if partBackend, ok := blobs.(UploadPartBackend); ok {
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s.uploadParts = partBackend
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}
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for _, opt := range opts {
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if opt != nil {
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||
opt(s)
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}
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}
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if s.mapTiles != nil {
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// 选项应用顺序无关：logger 在全部 Option 跑完后统一注入。
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s.mapTiles.log = s.log
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}
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if !s.thumbsSet {
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thumbnailer, err := NewFFmpegVideoThumbnailer()
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if err != nil {
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s.log.Warn("ffmpeg not found; server-side video thumbnail fallback disabled", zap.Error(err))
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} else {
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s.thumbs = thumbnailer
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}
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}
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return s
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}
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// SaveFilePart 累积一个 small file 分片。
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func (s *Service) SaveFilePart(ctx context.Context, ownerUserID, fileID int64, part int, bytes []byte) (bool, error) {
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if err := validatePart(part, len(bytes)); err != nil {
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return false, err
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}
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if err := s.saveFilePart(ctx, domain.UploadPart{
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OwnerUserID: ownerUserID,
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FileID: fileID,
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Part: part,
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Size: int64(len(bytes)),
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}, bytes); err != nil {
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return false, err
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}
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return true, nil
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}
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// SaveBigFilePart 累积一个 big file 分片（带已知总分片数）。
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func (s *Service) SaveBigFilePart(ctx context.Context, ownerUserID, fileID int64, part, totalParts int, bytes []byte) (bool, error) {
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if err := validatePart(part, len(bytes)); err != nil {
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return false, err
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}
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if totalParts <= 0 || totalParts > MaxUploadParts {
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return false, domain.ErrFilePartsInvalid
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}
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if err := s.saveFilePart(ctx, domain.UploadPart{
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OwnerUserID: ownerUserID,
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FileID: fileID,
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Part: part,
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TotalParts: totalParts,
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Big: true,
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Size: int64(len(bytes)),
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}, bytes); err != nil {
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return false, err
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}
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return true, nil
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}
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func (s *Service) saveFilePart(ctx context.Context, part domain.UploadPart, bytes []byte) error {
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if s.uploadParts == nil {
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return fmt.Errorf("upload part backend not configured")
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}
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slot, err := s.checkUploadPartQuota(ctx, part)
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if err != nil {
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return err
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}
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obj, err := s.uploadParts.PutUploadPart(ctx, part.OwnerUserID, part.FileID, part.Part, bytes)
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if err != nil {
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return err
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}
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part.Backend = obj.Backend
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part.ObjectKey = obj.ObjectKey
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part.Size = obj.Size
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part.SHA256 = obj.SHA256
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if err := s.media.SaveFilePart(ctx, part); err != nil {
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_ = s.uploadParts.DeleteUploadPart(ctx, obj.ObjectKey)
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return err
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}
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if slot.Found && slot.ObjectKey != "" && slot.ObjectKey != obj.ObjectKey {
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if err := s.uploadParts.DeleteUploadPart(ctx, slot.ObjectKey); err != nil {
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s.log.Warn("delete replaced upload part failed", zap.String("object_key", slot.ObjectKey), zap.Error(err))
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}
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}
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return nil
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}
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func (s *Service) checkUploadPartQuota(ctx context.Context, part domain.UploadPart) (domain.UploadPartSlot, error) {
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slot, err := s.media.UploadPartSlot(ctx, part.OwnerUserID, part.FileID, part.Part)
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if err != nil {
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return domain.UploadPartSlot{}, err
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}
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quota := s.uploadQuota
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if quota.MaxBytes <= 0 && quota.MaxParts <= 0 && quota.MaxFiles <= 0 {
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return slot, nil
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}
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usage, err := s.media.UploadPartUsage(ctx, part.OwnerUserID)
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if err != nil {
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return domain.UploadPartSlot{}, err
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}
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next := usage
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next.Bytes += part.Size - slot.ExistingBytes
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if !slot.Found {
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next.Parts++
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}
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if slot.FileParts == 0 {
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next.Files++
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}
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if quota.MaxBytes > 0 && next.Bytes > quota.MaxBytes {
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return domain.UploadPartSlot{}, domain.ErrUploadQuotaExceeded
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}
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if quota.MaxParts > 0 && next.Parts > quota.MaxParts {
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return domain.UploadPartSlot{}, domain.ErrUploadQuotaExceeded
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}
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if quota.MaxFiles > 0 && next.Files > quota.MaxFiles {
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return domain.UploadPartSlot{}, domain.ErrUploadQuotaExceeded
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}
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return slot, nil
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}
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// DeleteExpiredUploadParts 清理超过保留期仍未组装的 transient 上传分片。
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func (s *Service) DeleteExpiredUploadParts(ctx context.Context, before time.Time, limit int) (int64, error) {
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if limit <= 0 {
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return 0, nil
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}
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keys, err := s.media.DeleteExpiredUploadParts(ctx, before, limit)
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if err != nil {
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return 0, err
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}
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if err := s.deleteUploadPartObjects(ctx, keys); err != nil {
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return int64(len(keys)), err
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}
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var orphanDeleted int64
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if s.uploadParts != nil {
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n, err := s.uploadParts.DeleteExpiredUploadParts(ctx, before, limit)
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if err != nil {
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return int64(len(keys)), err
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}
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orphanDeleted = n
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}
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return int64(len(keys)) + orphanDeleted, nil
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}
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// GetFile 按 location_key 取一段 blob 内容。found=false 表示该 location 无对应 blob。
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// 元数据走进程内 LRU（消除每 chunk 一次 PG 查）；小 blob 全量字节进 LRU，供 sticker /
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// reaction / thumbnail 热路径直接内存切片；大 blob 仍按 offset/limit 段读。
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type blobMetaResult struct {
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blob domain.FileBlob
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found bool
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cacheHit bool
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cacheFilled bool
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}
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type blobBytesResult struct {
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data []byte
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total int64
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cacheable bool
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cacheHit bool
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cacheFilled bool
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}
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type getFileCacheLog struct {
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start time.Time
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metaCacheHit bool
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metaCacheFilled bool
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metaSingleflight bool
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byteCacheEligible bool
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byteCacheHit bool
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byteCacheFilled bool
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byteSingleflight bool
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backendRead bool
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source string
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}
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func (s *Service) GetFile(ctx context.Context, req domain.FileDownloadRequest) (chunk domain.FileChunk, found bool, err error) {
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cacheLog := getFileCacheLog{start: time.Now(), source: "unknown"}
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var blob domain.FileBlob
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defer func() {
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s.logGetFileCache(req, blob, found, chunk, cacheLog, err)
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}()
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||
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blob, ok := s.blobCache.get(req.LocationKey)
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if ok {
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cacheLog.metaCacheHit = true
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} else {
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// 同一 location_key 的并发首访合并成一次 PG GetFileBlob。
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v, err, shared := s.blobMetaSF.Do(req.LocationKey, func() (any, error) {
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||
if cached, ok := s.blobCache.get(req.LocationKey); ok {
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||
return blobMetaResult{blob: cached, found: true, cacheHit: true}, nil
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||
}
|
||
b, found, err := s.media.GetFileBlob(ctx, req.LocationKey)
|
||
if err != nil {
|
||
return blobMetaResult{}, err
|
||
}
|
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if found {
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s.blobCache.put(req.LocationKey, b)
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}
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return blobMetaResult{blob: b, found: found, cacheFilled: found}, nil
|
||
})
|
||
cacheLog.metaSingleflight = shared
|
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if err != nil {
|
||
return domain.FileChunk{}, false, err
|
||
}
|
||
res := v.(blobMetaResult)
|
||
cacheLog.metaCacheHit = res.cacheHit
|
||
cacheLog.metaCacheFilled = res.cacheFilled
|
||
if !res.found {
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cacheLog.source = "metadata_miss"
|
||
return domain.FileChunk{}, false, nil
|
||
}
|
||
blob = res.blob
|
||
}
|
||
if blob.Size > 0 && blob.Size <= blobBytesCacheMaxEntryBytes {
|
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cacheLog.byteCacheEligible = true
|
||
if data, ok := s.byteCache.get(blob.ObjectKey); ok {
|
||
cacheLog.byteCacheHit = true
|
||
cacheLog.source = "byte_cache"
|
||
return domain.FileChunk{
|
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Bytes: sliceBlobBytes(data, req.Offset, int64(req.Limit)),
|
||
MimeType: blob.MimeType,
|
||
Total: int64(len(data)),
|
||
}, true, nil
|
||
}
|
||
// 同一 object_key 的小 blob 并发首访合并成一次 backend 全量读 + 一次 byteCache 填充。
|
||
v, err, shared := s.blobBytesSF.Do(blob.ObjectKey, func() (any, error) {
|
||
if cached, ok := s.byteCache.get(blob.ObjectKey); ok {
|
||
return blobBytesResult{data: cached, total: int64(len(cached)), cacheable: true, cacheHit: true}, nil
|
||
}
|
||
data, total, err := s.blobs.GetRange(ctx, blob.ObjectKey, 0, blobBytesCacheMaxEntryBytes+1)
|
||
if err != nil {
|
||
return blobBytesResult{}, err
|
||
}
|
||
if total <= blobBytesCacheMaxEntryBytes && int64(len(data)) == total {
|
||
s.byteCache.put(blob.ObjectKey, data)
|
||
return blobBytesResult{data: data, total: total, cacheable: true, cacheFilled: true}, nil
|
||
}
|
||
return blobBytesResult{cacheable: false}, nil
|
||
})
|
||
cacheLog.byteSingleflight = shared
|
||
if err != nil {
|
||
return domain.FileChunk{}, false, fmt.Errorf("read blob %q: %w", blob.LocationKey, err)
|
||
}
|
||
// res.data 在并发 caller 间只读共享，sliceBlobBytes 各自拷贝出自己的分片，安全。
|
||
if res := v.(blobBytesResult); res.cacheable {
|
||
cacheLog.byteCacheHit = res.cacheHit
|
||
cacheLog.byteCacheFilled = res.cacheFilled
|
||
cacheLog.backendRead = res.cacheFilled
|
||
if res.cacheHit {
|
||
cacheLog.source = "byte_cache"
|
||
} else {
|
||
cacheLog.source = "backend_fill_byte_cache"
|
||
}
|
||
return domain.FileChunk{
|
||
Bytes: sliceBlobBytes(res.data, req.Offset, int64(req.Limit)),
|
||
MimeType: blob.MimeType,
|
||
Total: res.total,
|
||
}, true, nil
|
||
}
|
||
// 大小不符/超限：落到下面的按需 range 读(与原行为一致)。
|
||
cacheLog.source = "backend_range_uncacheable"
|
||
}
|
||
cacheLog.backendRead = true
|
||
if cacheLog.source == "unknown" {
|
||
cacheLog.source = "backend_range"
|
||
}
|
||
data, total, err := s.blobs.GetRange(ctx, blob.ObjectKey, req.Offset, int64(req.Limit))
|
||
if err != nil {
|
||
return domain.FileChunk{}, false, fmt.Errorf("read blob %q: %w", blob.LocationKey, err)
|
||
}
|
||
return domain.FileChunk{
|
||
Bytes: data,
|
||
MimeType: blob.MimeType,
|
||
Total: total,
|
||
}, true, nil
|
||
}
|
||
|
||
func (s *Service) logGetFileCache(req domain.FileDownloadRequest, blob domain.FileBlob, found bool, chunk domain.FileChunk, cacheLog getFileCacheLog, err error) {
|
||
fields := []zap.Field{
|
||
zap.String("location_key", req.LocationKey),
|
||
zap.Int64("offset", req.Offset),
|
||
zap.Int("limit", req.Limit),
|
||
zap.Bool("found", found),
|
||
zap.String("source", cacheLog.source),
|
||
zap.Bool("meta_cache_hit", cacheLog.metaCacheHit),
|
||
zap.Bool("meta_cache_filled", cacheLog.metaCacheFilled),
|
||
zap.Bool("meta_singleflight_shared", cacheLog.metaSingleflight),
|
||
zap.Bool("byte_cache_eligible", cacheLog.byteCacheEligible),
|
||
zap.Bool("byte_cache_hit", cacheLog.byteCacheHit),
|
||
zap.Bool("byte_cache_filled", cacheLog.byteCacheFilled),
|
||
zap.Bool("byte_singleflight_shared", cacheLog.byteSingleflight),
|
||
zap.Bool("backend_read", cacheLog.backendRead),
|
||
zap.Int("returned_bytes", len(chunk.Bytes)),
|
||
zap.Int64("total_bytes", chunk.Total),
|
||
zap.Duration("dur", time.Since(cacheLog.start)),
|
||
}
|
||
if blob.ObjectKey != "" {
|
||
fields = append(fields,
|
||
zap.String("object_key", blob.ObjectKey),
|
||
zap.Int64("blob_size", blob.Size),
|
||
zap.String("mime_type", blob.MimeType),
|
||
)
|
||
}
|
||
if err != nil {
|
||
fields = append(fields, zap.Error(err))
|
||
}
|
||
s.log.Info("upload.getFile cache", fields...)
|
||
}
|
||
|
||
func sliceBlobBytes(data []byte, offset, limit int64) []byte {
|
||
total := int64(len(data))
|
||
if offset < 0 {
|
||
offset = 0
|
||
}
|
||
if offset >= total {
|
||
return []byte{}
|
||
}
|
||
end := total
|
||
if limit > 0 && offset+limit < end {
|
||
end = offset + limit
|
||
}
|
||
return append([]byte(nil), data[offset:end]...)
|
||
}
|
||
|
||
// ---- 资源读取（reaction / sticker / document）----
|
||
|
||
// ListAvailableReactions 返回可用 reaction 目录（带真实文档 id）。
|
||
func (s *Service) ListAvailableReactions(ctx context.Context) ([]domain.AvailableReaction, error) {
|
||
return s.media.ListAvailableReactions(ctx)
|
||
}
|
||
|
||
// GetDocuments 按 id 批量加载文档（自定义 emoji / 贴纸）。
|
||
func (s *Service) GetDocuments(ctx context.Context, ids []int64) ([]domain.Document, error) {
|
||
return s.media.GetDocuments(ctx, ids)
|
||
}
|
||
|
||
// ListStickerSets 列出某类贴纸集（用于 getAllStickers 等）。
|
||
func (s *Service) ListStickerSets(ctx context.Context, kind domain.StickerSetKind) ([]domain.StickerSet, error) {
|
||
return s.media.ListStickerSets(ctx, kind)
|
||
}
|
||
|
||
// ResolveStickerSet 按 ref 解析贴纸集，并按 DocumentIDs 顺序加载其文档。
|
||
func (s *Service) ResolveStickerSet(ctx context.Context, ref domain.StickerSetRef) (domain.StickerSet, []domain.Document, bool, error) {
|
||
if set, docs, ok := s.stickerSetCache.get(ref); ok {
|
||
return set, docs, true, nil
|
||
}
|
||
// 负缓存：已 seed 集启动即进正缓存（WarmCaches），能走到这里的 miss 多是「未 seed 的 short_name」
|
||
// 被客户端反复请求。TTL 内直接当 not-found 短路，避免每次都打 PG GetStickerSetByShortName。
|
||
if s.stickerSetNegCache != nil && s.stickerSetNegCache.has(ref) {
|
||
return domain.StickerSet{}, nil, false, nil
|
||
}
|
||
var (
|
||
set domain.StickerSet
|
||
found bool
|
||
err error
|
||
)
|
||
switch ref.Kind {
|
||
case domain.StickerSetRefByID:
|
||
set, found, err = s.media.GetStickerSetByID(ctx, ref.ID)
|
||
case domain.StickerSetRefByShortName:
|
||
set, found, err = s.media.GetStickerSetByShortName(ctx, ref.ShortName)
|
||
case domain.StickerSetRefBySystem:
|
||
set, found, err = s.media.GetStickerSetBySystemKey(ctx, ref.SystemKey)
|
||
default:
|
||
return domain.StickerSet{}, nil, false, nil
|
||
}
|
||
if err != nil || !found {
|
||
if err == nil && !found && s.stickerSetNegCache != nil {
|
||
s.stickerSetNegCache.put(ref)
|
||
}
|
||
return domain.StickerSet{}, nil, found, err
|
||
}
|
||
docs, err := s.media.GetDocuments(ctx, set.DocumentIDs)
|
||
if err != nil {
|
||
return domain.StickerSet{}, nil, false, err
|
||
}
|
||
ordered := orderDocuments(docs, set.DocumentIDs)
|
||
s.stickerSetCache.put(set, ordered)
|
||
return set, ordered, true, nil
|
||
}
|
||
|
||
// orderDocuments 把无序的文档按 ids 顺序重排（GetDocuments 用 ANY 查询不保证顺序）。
|
||
func orderDocuments(docs []domain.Document, ids []int64) []domain.Document {
|
||
byID := make(map[int64]domain.Document, len(docs))
|
||
for _, d := range docs {
|
||
byID[d.ID] = d
|
||
}
|
||
out := make([]domain.Document, 0, len(ids))
|
||
for _, id := range ids {
|
||
if d, ok := byID[id]; ok {
|
||
out = append(out, d)
|
||
}
|
||
}
|
||
return out
|
||
}
|
||
|
||
// assembleUpload 把已上传分片按 part 顺序拼成完整字节，并清理分片。
|
||
// expectedParts>0 时校验分片连续且齐全。
|
||
func (s *Service) assembleUpload(ctx context.Context, ownerUserID, fileID int64, expectedParts int) ([]byte, error) {
|
||
parts, _, err := s.loadAndValidateUploadParts(ctx, ownerUserID, fileID, expectedParts)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
buf := make([]byte, 0, uploadPartsTotalSize(parts))
|
||
for _, p := range parts {
|
||
if s.uploadParts == nil {
|
||
return nil, fmt.Errorf("upload part backend not configured")
|
||
}
|
||
data, err := s.uploadParts.GetUploadPart(ctx, p.ObjectKey)
|
||
if err != nil {
|
||
return nil, fmt.Errorf("read upload part %d: %w", p.Part, err)
|
||
}
|
||
if err := validateUploadPartBytes(p, data); err != nil {
|
||
return nil, err
|
||
}
|
||
buf = append(buf, data...)
|
||
}
|
||
if err := s.cleanupUploadParts(ctx, ownerUserID, fileID); err != nil {
|
||
return nil, err
|
||
}
|
||
return buf, nil
|
||
}
|
||
|
||
type assembledUploadBlob struct {
|
||
ObjectKey string
|
||
Size int64
|
||
SHA256 []byte
|
||
}
|
||
|
||
// assembleUploadBlob 把上传分片流式写入正式 blob。调用方应在 durable media 元数据
|
||
// 成功提交后调用 cleanupUploadParts，避免 metadata 写失败时丢失可重试的上传分片。
|
||
func (s *Service) assembleUploadBlob(ctx context.Context, ownerUserID, fileID int64, expectedParts int) (assembledUploadBlob, error) {
|
||
parts, _, err := s.loadAndValidateUploadParts(ctx, ownerUserID, fileID, expectedParts)
|
||
if err != nil {
|
||
return assembledUploadBlob{}, err
|
||
}
|
||
if s.uploadParts == nil {
|
||
return assembledUploadBlob{}, fmt.Errorf("upload part backend not configured")
|
||
}
|
||
reader := &uploadPartsReader{
|
||
ctx: ctx,
|
||
backend: s.uploadParts,
|
||
parts: parts,
|
||
}
|
||
defer reader.Close()
|
||
objectKey, size, sum, err := s.blobs.PutReader(ctx, reader)
|
||
if err != nil {
|
||
return assembledUploadBlob{}, err
|
||
}
|
||
return assembledUploadBlob{
|
||
ObjectKey: objectKey,
|
||
Size: size,
|
||
SHA256: sum,
|
||
}, nil
|
||
}
|
||
|
||
func (s *Service) loadAndValidateUploadParts(ctx context.Context, ownerUserID, fileID int64, expectedParts int) ([]domain.UploadPart, int64, error) {
|
||
parts, err := s.media.LoadFileParts(ctx, ownerUserID, fileID)
|
||
if err != nil {
|
||
return nil, 0, err
|
||
}
|
||
if len(parts) == 0 {
|
||
return nil, 0, domain.ErrFilePartsInvalid
|
||
}
|
||
if expectedParts > 0 && len(parts) != expectedParts {
|
||
return nil, 0, domain.ErrFilePartsInvalid
|
||
}
|
||
var total int64
|
||
for i, p := range parts {
|
||
if p.Part != i {
|
||
return nil, 0, domain.ErrFilePartsInvalid // 缺片或乱序
|
||
}
|
||
if p.Size <= 0 || p.Size > MaxUploadPartBytes || p.ObjectKey == "" {
|
||
return nil, 0, domain.ErrFilePartsInvalid
|
||
}
|
||
total += p.Size
|
||
if total > DefaultUploadInFlightMaxBytes {
|
||
return nil, 0, domain.ErrFilePartsInvalid
|
||
}
|
||
}
|
||
return parts, total, nil
|
||
}
|
||
|
||
func uploadPartsTotalSize(parts []domain.UploadPart) int {
|
||
var total int64
|
||
for _, p := range parts {
|
||
total += p.Size
|
||
}
|
||
return int(total)
|
||
}
|
||
|
||
func validateUploadPartBytes(part domain.UploadPart, data []byte) error {
|
||
if int64(len(data)) != part.Size {
|
||
return domain.ErrFilePartsInvalid
|
||
}
|
||
if len(part.SHA256) > 0 {
|
||
sum := sha256.Sum256(data)
|
||
if !bytes.Equal(sum[:], part.SHA256) {
|
||
return domain.ErrFilePartsInvalid
|
||
}
|
||
}
|
||
return nil
|
||
}
|
||
|
||
func (s *Service) cleanupUploadParts(ctx context.Context, ownerUserID, fileID int64) error {
|
||
keys, err := s.media.DeleteFileParts(ctx, ownerUserID, fileID)
|
||
if err != nil {
|
||
return err
|
||
}
|
||
if err := s.deleteUploadPartObjects(ctx, keys); err != nil {
|
||
return err
|
||
}
|
||
return nil
|
||
}
|
||
|
||
type uploadPartsReader struct {
|
||
ctx context.Context
|
||
backend UploadPartBackend
|
||
parts []domain.UploadPart
|
||
index int
|
||
current io.ReadCloser
|
||
currentRead int64
|
||
currentHash hash.Hash
|
||
}
|
||
|
||
func (r *uploadPartsReader) Read(buf []byte) (int, error) {
|
||
for {
|
||
if r.current == nil {
|
||
if r.index >= len(r.parts) {
|
||
return 0, io.EOF
|
||
}
|
||
select {
|
||
case <-r.ctx.Done():
|
||
return 0, r.ctx.Err()
|
||
default:
|
||
}
|
||
part := r.parts[r.index]
|
||
rc, err := r.backend.OpenUploadPart(r.ctx, part.ObjectKey)
|
||
if err != nil {
|
||
return 0, fmt.Errorf("open upload part %d: %w", part.Part, err)
|
||
}
|
||
r.current = rc
|
||
r.currentRead = 0
|
||
if len(part.SHA256) > 0 {
|
||
r.currentHash = sha256.New()
|
||
} else {
|
||
r.currentHash = nil
|
||
}
|
||
}
|
||
n, err := r.current.Read(buf)
|
||
if n > 0 {
|
||
r.currentRead += int64(n)
|
||
if r.currentHash != nil {
|
||
_, _ = r.currentHash.Write(buf[:n])
|
||
}
|
||
return n, nil
|
||
}
|
||
if err == io.EOF {
|
||
if err := r.finishCurrentPart(); err != nil {
|
||
return 0, err
|
||
}
|
||
continue
|
||
}
|
||
if err != nil {
|
||
_ = r.current.Close()
|
||
part := r.parts[r.index]
|
||
r.current = nil
|
||
return 0, fmt.Errorf("read upload part %d: %w", part.Part, err)
|
||
}
|
||
return 0, nil
|
||
}
|
||
}
|
||
|
||
func (r *uploadPartsReader) finishCurrentPart() error {
|
||
part := r.parts[r.index]
|
||
closeErr := r.current.Close()
|
||
r.current = nil
|
||
if closeErr != nil {
|
||
return fmt.Errorf("close upload part %d: %w", part.Part, closeErr)
|
||
}
|
||
if r.currentRead != part.Size {
|
||
return domain.ErrFilePartsInvalid
|
||
}
|
||
if r.currentHash != nil && !bytes.Equal(r.currentHash.Sum(nil), part.SHA256) {
|
||
return domain.ErrFilePartsInvalid
|
||
}
|
||
r.currentHash = nil
|
||
r.currentRead = 0
|
||
r.index++
|
||
return nil
|
||
}
|
||
|
||
func (r *uploadPartsReader) Close() error {
|
||
if r.current == nil {
|
||
return nil
|
||
}
|
||
err := r.current.Close()
|
||
r.current = nil
|
||
return err
|
||
}
|
||
|
||
func (s *Service) deleteUploadPartObjects(ctx context.Context, keys []string) error {
|
||
if len(keys) == 0 {
|
||
return nil
|
||
}
|
||
if s.uploadParts == nil {
|
||
return fmt.Errorf("upload part backend not configured")
|
||
}
|
||
for _, key := range keys {
|
||
if key == "" {
|
||
continue
|
||
}
|
||
if err := s.uploadParts.DeleteUploadPart(ctx, key); err != nil {
|
||
return err
|
||
}
|
||
}
|
||
return nil
|
||
}
|
||
|
||
func validatePart(part, size int) error {
|
||
if part < 0 || part >= MaxUploadParts {
|
||
return domain.ErrFilePartInvalid
|
||
}
|
||
if size == 0 {
|
||
return domain.ErrFilePartInvalid
|
||
}
|
||
if size > MaxUploadPartBytes {
|
||
return domain.ErrFilePartTooBig
|
||
}
|
||
return nil
|
||
}
|