如何处理此调用上的etimedout错误？

 var remotePath = "myremoteurltocopy"
 var localStream = fs.createWriteStream("myfil");;
        var out = request({ uri: remotePath });
        out.on('response', function (resp) {
            if (resp.statusCode === 200) {
                out.pipe(localStream);
                localStream.on('close', function () {
                    copyconcurenceacces--;
                    console.log('aftercopy');
                    callback(null, localFile);
                });
            }
            else
                callback(new Error("No file found at given url."), null);
        })

有没有办法等待更长的时间？还是再次请求远程文件？

究竟是什么会导致此错误？仅超时？