Fix chunk manager

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