Fixed possible whitespace in hashes

Fixed possible whitespace in hashes when uploading by magnet url when
lagnet url have a hash with whitespace

service/api/api.go

@@ -179,7 +179,7 @@ func (r *TorrentRequest) validateMagnet() error {
 		return ErrMagnet
 	}
 	xt = strings.SplitAfter(xt, ":")[2]
-	r.Infohash = strings.ToUpper(strings.Split(xt, "&")[0])
+	r.Infohash = strings.TrimSpace(strings.ToUpper(strings.Split(xt, "&")[0]))
 
 	return nil
 }