Fix download issues

pkg/chunk/download.go

@@ -114,16 +114,14 @@ func (d *Downloader) downloadFromAPI(request *Request, buffer []byte, delay int6
 	downloadURL := resp.Download
 	req, err := http.NewRequest("GET", downloadURL, nil)
 	if nil != err {
-		d.log.Debugf("%v", err)
+		d.log.Debugf("request init error: %v", err)
 		return fmt.Errorf("could not create request object %s %s from API", request.file.Path, request.file.Link)
 	}
 	req.Header.Add("Range", fmt.Sprintf("bytes=%v-%v", request.offsetStart, request.offsetEnd-1))
 
-	d.log.Debugw("Sending HTTP Request %v", req)
-
 	res, err := http.DefaultClient.Do(req)
 	if nil != err {
-		d.log.Debugf("%v", err)
+		d.log.Debugf("request error: %v", err)
 		return fmt.Errorf("could not request object %s %s from API", request.file.Path, request.file.Link)
 	}
 	defer res.Body.Close()
@@ -139,8 +137,8 @@ func (d *Downloader) downloadFromAPI(request *Request, buffer []byte, delay int6
 	}
 
 	n, err := io.ReadFull(reader, buffer[:res.ContentLength:cap(buffer)])
-	if nil != err {
-		d.log.Debugf("%v", err)
+	if nil != err && err != io.ErrUnexpectedEOF {
+		d.log.Debugf("response read error: %v", err)
 		return fmt.Errorf("could not read objects %s %s API response", request.file.Path, request.file.Link)
 	}
 	d.log.Debugf("Downloaded %v bytes of %s %s", n, request.file.Path, request.file.Link)

pkg/chunk/manager.go

@@ -1,8 +1,8 @@
 package chunk
 
 import (
+	"crypto/sha256"
 	"encoding/binary"
-	"encoding/hex"
 	"fmt"
 	"os"
 
@@ -144,7 +144,12 @@ func (m *Manager) GetChunk(object *torrent.File, offset, size int64) ([]byte, er
 }
 
 func buildRequestID(object *torrent.File, offset int64) (id RequestID) {
-	hex.Decode(id[:], []byte(object.Link))
+	fileID := object.Link
+	if fileID == "" {
+		fileID = object.Path
+	}
+	hash := sha256.Sum256([]byte(fileID))
+	copy(id[:16], hash[:16])
 	binary.BigEndian.PutUint64(id[16:], uint64(offset))
 	return
 }