Fix location of pref hosts injection

internal/torrent/manager.go

@@ -2,6 +2,7 @@ package torrent
 
 import (
 	"io"
+	"net/url"
 	"os"
 	"path/filepath"
 	"strings"
@@ -71,6 +72,12 @@ func NewTorrentManager(cfg config.ConfigInterface, api *realdebrid.RealDebrid, p
 				}
 				for i := range downloads {
 					if !t.DownloadCache.Has(downloads[i].Link) {
+						if strings.Contains(downloads[i].Download, "download.real-debrid.") {
+							prefHost := t.Config.GetRandomPreferredHost()
+							if prefHost != "" {
+								downloads[i].Download = replaceHostInURL(downloads[i].Download, prefHost)
+							}
+						}
 						t.DownloadCache.Set(downloads[i].Link, &downloads[i])
 					}
 				}
@@ -114,6 +121,12 @@ func (t *TorrentManager) UnrestrictUntilOk(link string) *realdebrid.Download {
 	}
 	ret := t.Api.UnrestrictUntilOk(link, t.Config.ShouldServeFromRclone())
 	if ret != nil {
+		if strings.Contains(ret.Download, "download.real-debrid.") {
+			prefHost := t.Config.GetRandomPreferredHost()
+			if prefHost != "" {
+				ret.Download = replaceHostInURL(ret.Download, prefHost)
+			}
+		}
 		t.DownloadCache.Set(link, ret)
 	}
 	return ret
@@ -231,3 +244,12 @@ func (t *TorrentManager) deleteTorrentFile(torrentID string) {
 		t.log.Warnf("Cannot delete file %s: %v", filePath, err)
 	}
 }
+
+func replaceHostInURL(inputURL string, newHost string) string {
+	u, err := url.Parse(inputURL)
+	if err != nil {
+		return ""
+	}
+	u.Host = newHost
+	return u.String()
+}