public Stream DownloadFileStream(string serverfile, long offset = 0, long count = 0)
{
CusFileInfo file = new CusFileInfo();
file.filepath = ConfigurationManager.AppSettings["ServerDownLoadURL"] + serverfile;
file.FileName = serverfile;
//string[] strlist1 = Directory.GetFiles(ConfigurationManager.AppSettings["ServerDownLoadURL"]);
FileInfo ff = new FileInfo(file.filepath);
if (File.Exists(file.filepath))
{
if (count == 0)
{
count = ff.Length - offset;
}
var outgoingResponse = WebOperationContext.Current.OutgoingResponse;
outgoingResponse.ContentType = "application/force-download";
Console.WriteLine("开始下载：" + serverfile + "(" + offset + "--" + count + ")");
CusStreamReader fs = new CusStreamReader(new FileStream(file.filepath, FileMode.Open, FileAccess.Read, FileShare.Read), offset, count);
fs.Reading += (t) =>
{
//限速代码,实际使用时可以去掉，或者精确控制
Thread.Sleep(10);
Console.WriteLine(t);
};
return(fs);
}
else
{
throw new FaultException("没找到文件：" + serverfile);
}
}
public string GetFile(string serverfile)
{
string strMD5 = "|MD5";
if (serverfile.EndsWith(strMD5))
{
return(GetMD5HashFromFile(serverfile.Remove(serverfile.IndexOf(strMD5))));
}
string path = ConfigurationManager.AppSettings["ServerDownLoadURL"] + serverfile;
if (Directory.Exists(path))
{
string result = "";
//获取目录内文件名
DirectoryInfo directoryInfo = new DirectoryInfo(path);
FileInfo[] fileList = directoryInfo.GetFiles();
foreach (FileInfo file in fileList)
{
result = result + @"|" + file.Name;
}
if (result.StartsWith(@"|"))
{
result = result.Substring(1);
}
return(result);
}
else
{
//获取文件长度
CusFileInfo file = new CusFileInfo();
file.filepath = ConfigurationManager.AppSettings["ServerDownLoadURL"] + serverfile;
file.FileName = serverfile;
FileInfo ff = new FileInfo(file.filepath);
if (File.Exists(file.filepath))
{
return(ff.Length.ToString());
}
else
{
throw new FaultException("没找到文件：" + serverfile);
}
}
}
public Stream DownloadFileStream(string serverfile)
{
CusFileInfo file = new CusFileInfo();
file.filepath = ConfigurationManager.AppSettings["ServerDownLoadURL"] + serverfile;
if (File.Exists(file.filepath))
{
var incomingRequest = WebOperationContext.Current.IncomingRequest;
var outgoingResponse = WebOperationContext.Current.OutgoingResponse;
long offset = 0, count = file.FileLength;
if (incomingRequest.Headers.AllKeys.Contains("Range"))
{
var match = System.Text.RegularExpressions.Regex.Match(incomingRequest.Headers["Range"], @"(?<=bytes\b*=)(\d*)-(\d*)");
if (match.Success)
{
outgoingResponse.StatusCode = System.Net.HttpStatusCode.PartialContent;
string v1 = match.Groups[1].Value;
string v2 = match.Groups[2].Value;
if (!match.NextMatch().Success)
{
if (v1 == "" && v2 != "")
{
var r2 = long.Parse(v2);
offset = count - r2;
count = r2;
}
else if (v1 != "" && v2 == "")
{
var r1 = long.Parse(v1);
offset = r1;
count -= r1;
}
else if (v1 != "" && v2 != "")
{
var r1 = long.Parse(v1);
var r2 = long.Parse(v2);
offset = r1;
count -= r2 - r1 + 1;
}
else
{
outgoingResponse.StatusCode = System.Net.HttpStatusCode.OK;
}
}
}
}
outgoingResponse.ContentType = "application/force-download";
outgoingResponse.ContentLength = count;
Console.WriteLine("开始下载：" + serverfile + "(" + offset + "--" + count + ")");
CusStreamReader fs = new CusStreamReader(new FileStream(file.filepath, FileMode.Open, FileAccess.Read, FileShare.Read), offset, count);
//fs.Reading += (t) =>
// {
// //限速代码,实际使用时可以去掉，或者精确控制
// Thread.Sleep(300);
// Console.WriteLine(t);
// };
return(fs);
}
else
{
throw new FaultException("没找到文件：" + serverfile);
}
}
