/// <summary>
/// 显示文件
/// </summary>
/// <param name="filename"></param>
private void ShowFile(string filename, string name, RequestInfo request, ResponseInfo response)
{
FileInfo finf = new FileInfo(filename);
response.MimeType = WebCommon.GetContentType(finf.Extension.Trim('.'));
string strName = RequestInfo.GetFileName(request, name);
response.Header["Content-Disposition"] = "attachment;filename=" + strName;
long len = finf.Length;
response.Header["Accept-Ranges"] = "bytes";
response.Header["Content-Transfer-Encoding"] = "binary";
if (request.Header.ContainsKey("range")) //如果客户端指定了分段下载
{
List <RangeInfo> lstRange = ResponseInfo.GetRange(request.Header["Range"], finf.Length); //处理区段信息
if (lstRange.Count > 0)
{
response.Header["Content-Range"] = "bytes " + lstRange[0].Start + "-" + lstRange[0].End + "/" + finf.Length;//指定区段
response.StatusCode = 206;
}
}
try
{
response.UserTag = finf;
response.Length = len;
response.RangeLength = finf.Length;
}
catch (Exception ex)
{
response.Write("数据读取失败:" + ex.Message);
}
}
void _server_OnRequestSendingBody(RequestInfo request, ResponseInfo response, System.Net.Sockets.Socket requestSocket)
{
if (response.UserTag != null)
{
FileInfo finf = response.UserTag as FileInfo;
RangeInfo range = null;
if (request.Header.ContainsKey("range"))
{
List <RangeInfo> lstRange = ResponseInfo.GetRange(request.Header["Range"], finf.Length);
if (lstRange.Count > 0)
{
range = lstRange[0];
}
}
if (range == null)
{
range = new RangeInfo();
range.End = finf.Length - 1;
}
if (finf != null)
{
byte[] buff = new byte[512 * 1024];
int read = 0;
using (FileStream stm = finf.Open(FileMode.Open))
{
stm.Position = range.Start;
long totleLen = range.Length;
while (true)
{
read = stm.Read(buff, 0, buff.Length);
if (read > totleLen)
{
read = (int)totleLen;
}
if (read > 0)
{
requestSocket.Send(buff, 0, read, SocketFlags.None);
totleLen -= read;
}
if (read <= 0 || totleLen <= 0)
{
break;
}
}
}
}
}
}
