Fix chunk manager

pkg/chunk/download.go

@@ -8,7 +8,6 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/debridmediamanager.com/zurg/internal/config"
 	"github.com/debridmediamanager.com/zurg/internal/torrent"
 	"github.com/debridmediamanager.com/zurg/pkg/logutil"
 	"go.uber.org/zap"
@@ -22,15 +21,14 @@ type Downloader struct {
 	callbacks  map[RequestID][]DownloadCallback
 	lock       sync.Mutex
 	storage    *Storage
-	c          config.ConfigInterface
-	t          *torrent.TorrentManager
+	torMgr     *torrent.TorrentManager
 	log        *zap.SugaredLogger
 }
 
 type DownloadCallback func(error, []byte)
 
 // NewDownloader creates a new download manager
-func NewDownloader(threads int, storage *Storage, bufferSize int64, t *torrent.TorrentManager, c config.ConfigInterface) (*Downloader, error) {
+func NewDownloader(threads int, storage *Storage, bufferSize int64, torMgr *torrent.TorrentManager) (*Downloader, error) {
 	rlog := logutil.NewLogger()
 	log := rlog.Named("downloader")
 
@@ -39,8 +37,7 @@ func NewDownloader(threads int, storage *Storage, bufferSize int64, t *torrent.T
 		queue:      make(chan *Request, 100),
 		callbacks:  make(map[RequestID][]DownloadCallback, 100),
 		storage:    storage,
-		c:          c,
-		t:          t,
+		torMgr:     torMgr,
 		log:        log,
 	}
 
@@ -105,7 +102,7 @@ func (d *Downloader) downloadFromAPI(request *Request, buffer []byte, delay int6
 		time.Sleep(time.Duration(delay) * time.Second)
 	}
 
-	resp := d.t.UnrestrictUntilOk(request.file.Link)
+	resp := d.torMgr.UnrestrictUntilOk(request.file.Link)
 	if resp == nil {
 		return fmt.Errorf("cannot unrestrict file %s %s", request.file.Path, request.file.Link)
 	}

pkg/chunk/manager.go

@@ -1,9 +1,9 @@
 package chunk
 
 import (
-	"crypto/sha256"
 	"encoding/binary"
 	"fmt"
+	"hash/fnv"
 	"os"
 
 	"github.com/debridmediamanager.com/zurg/internal/config"
@@ -58,8 +58,8 @@ func NewManager(
 	checkThreads,
 	loadThreads,
 	maxChunks int,
-	t *torrent.TorrentManager,
-	c config.ConfigInterface) (*Manager, error) {
+	torMgr *torrent.TorrentManager,
+	cfg config.ConfigInterface) (*Manager, error) {
 
 	pageSize := int64(os.Getpagesize())
 	if chunkSize < pageSize {
@@ -82,7 +82,7 @@ func NewManager(
 		return nil, err
 	}
 
-	downloader, err := NewDownloader(loadThreads, storage, chunkSize, t, c)
+	downloader, err := NewDownloader(loadThreads, storage, chunkSize, torMgr)
 	if nil != err {
 		return nil, err
 	}
@@ -149,12 +149,17 @@ func buildRequestID(object *torrent.File, offset int64) (id RequestID) {
 	if fileID == "" {
 		fileID = object.Path
 	}
-	hash := sha256.Sum256([]byte(fileID))
+	hash := hashStringToFh(fileID)
 	copy(id[:16], hash[:16])
 	binary.BigEndian.PutUint64(id[16:], uint64(offset))
 	return
 }
 
+func hashStringToFh(s string) []byte {
+	hasher := fnv.New64a()
+	return hasher.Sum([]byte(s))
+}
+
 func (m *Manager) requestChunk(object *torrent.File, offset, size int64, sequence int, preload bool, response chan Response) {
 	chunkOffset := offset % m.ChunkSize
 	offsetStart := offset - chunkOffset