HttpWebRequest.AddRange请求下载文件二次请求下载延迟

[Lehman_Tong]

采用HttpWebRequest.AddRange下载文件，从而实现断点续传，但是，当我采用断点续传二次访问，读取服务器文件的时候大量延迟。
服务器文件并且支持断点Range方法

public bool blStop = false;//是否停止
public void DoanLoadMethod(string url,string savePath)
{
try
{
HttpWebRequest request = HttpWebRequest.Create(url) as HttpWebRequest; //创建请求对象

//文件流处理
Stream saveStream = null;
if (File.Exists(savePath))
{
saveStream = File.OpenWrite(savePath);
request.AddRange((int)saveStream.Length);
saveStream.Seek(saveStream.Length, SeekOrigin.Current);
}
else
saveStream = new FileStream(savePath, FileMode.Create);
//请求处理
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
//服务器文件流
Stream webStream = response.GetResponseStream();
//循环读取文件流信息
byte[] arrByte = new byte[1024];
int readSize = 0;
readSize = webStream.Read(arrByte, 0, arrByte.Length);
while (readSize > 0)
{
if (blStop)
break;
saveStream.Write(arrByte, 0, readSize);
saveStream.Flush();
readSize = webStream.Read(arrByte, 0, arrByte.Length);
}
saveStream.Close();
response.Close();
request.Abort();
}
catch { }
}

[yang__zhuo]

没啥好区分的，两个都喜欢，都用。看需求下菜