| 150 | } |
| 151 | |
| 152 | func (sto *Storage) Fetch(ctx context.Context, b blob.Ref) (rc io.ReadCloser, size uint32, err error) { |
| 153 | rc, size, err = sto.cache.Fetch(ctx, b) |
| 154 | if err == nil { |
| 155 | sto.touch(blob.SizedRef{Ref: b, Size: size}) |
| 156 | return |
| 157 | } |
| 158 | if err != os.ErrNotExist { |
| 159 | log.Printf("warning: proxycache cache fetch error for %v: %v", b, err) |
| 160 | } |
| 161 | rc, size, err = sto.origin.Fetch(ctx, b) |
| 162 | if err != nil { |
| 163 | return |
| 164 | } |
| 165 | all, err := io.ReadAll(rc) |
| 166 | if err != nil { |
| 167 | return |
| 168 | } |
| 169 | if _, err := blobserver.Receive(ctx, sto.cache, b, bytes.NewReader(all)); err != nil { |
| 170 | log.Printf("populating proxycache cache for %v: %v", b, err) |
| 171 | } else { |
| 172 | sto.touch(blob.SizedRef{Ref: b, Size: size}) |
| 173 | } |
| 174 | return io.NopCloser(bytes.NewReader(all)), size, nil |
| 175 | } |
| 176 | |
| 177 | func (sto *Storage) SubFetch(ctx context.Context, ref blob.Ref, offset, length int64) (io.ReadCloser, error) { |
| 178 | if sf, ok := sto.cache.(blob.SubFetcher); ok { |