public static DownLoadInfo GetDownLoadInfo(string fileName)
{
if (downLoadInfos == null)
{
downLoadInfos = new Dictionary <string, DownLoadInfo>();
}
DownLoadInfo info = null;
if (downLoadInfos.TryGetValue(fileName, out info))
{
return(info);
}
info = new DownLoadInfo();
downLoadInfos.Add(fileName, info);
return(info);
}
static void TaskProc(object o)
{
HttpListenerContext ctx = (HttpListenerContext)o;
int length = URL.Length;
string RequestURL = ctx.Request.Url.ToString();
string fileName = RequestURL.Substring(length);
string downloadSizeKey = "bytes";
string downloadSpeedKey = "DownLoadSpeed";
string downloadTypeKey = "DownLoadType";
string versionKey = "Version";
string osTypeKey = "OsType";
DownLoadInfo downLoadInfo = GetDownLoadInfo(fileName);
downLoadInfo.fileName = fileName;
string[] allKeys = ctx.Request.Headers.AllKeys;
for (int i = 0; i < allKeys.Length; i++)
{
string keyValues = ctx.Request.Headers[allKeys[i]];
string[] context = keyValues.Split('=');
if (context.Length <= 0)
{
continue;
}
if (context[0] == downloadSizeKey)
{
string[] byteCount = context[1].Split('-');
downLoadInfo.DownLoadSize = System.Convert.ToInt32(byteCount[0]);
}
else if (context[0] == downloadSpeedKey)
{
downLoadInfo.BitsPerSecond = System.Convert.ToInt32(context[1]);
}
else if (context[0] == downloadTypeKey)
{
downLoadInfo.downLoadType = (DownLoadType)Enum.Parse(typeof(DownLoadType), context[1]);
}
else if (context[0] == versionKey)
{
downLoadInfo.version = System.Convert.ToInt32(context[1]);
}
else if (context[0] == osTypeKey)
{
downLoadInfo.platformType = (ePlatformType)Enum.Parse(typeof(ePlatformType), context[1]);
}
}
downLoadInfo.PrintInfo();
string fullName = downLoadInfo.GetFullFileName();
if (!File.Exists(fullName))
{
Console.WriteLine(fullName);
Console.WriteLine("你要下载的文件不存在!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
ctx.Response.StatusCode = 101;
ctx.Response.Close();
return;
}
ctx.Response.StatusCode = 200; //设置返回给客服端http状态代码
using (FileStream fs = File.Open(fullName, FileMode.Open))
{
if (downLoadInfo.downLoadType != DownLoadType.FileManifest)
{
int number = 0;
int BitsPerSecond = downLoadInfo.BitsPerSecond;
Console.WriteLine("文件大小:" + fs.Length);
while (true)
{
int RemainingLength = (int)fs.Length - downLoadInfo.DownLoadSize;
if (RemainingLength <= 0)
{
break;
}
int downLength = RemainingLength < BitsPerSecond ? RemainingLength : BitsPerSecond;
byte[] downBytes = new byte[downLength];
fs.Seek(downLoadInfo.DownLoadSize, SeekOrigin.Begin);
fs.Read(downBytes, 0, downLength);
downLoadInfo.DownLoadSize += downLength;
number++;
ctx.Response.OutputStream.Write(downBytes, 0, downLength);
//Console.WriteLine(string.Format("总共输送了:{0} Bit", downLoadInfo.DownLoadSize));
Thread.Sleep(100);
}
ctx.Response.Close();
Console.WriteLine("输送完毕!");
}
else
{
byte[] downBytes = new byte[fs.Length];
fs.Read(downBytes, 0, downBytes.Length);
string context = Encoding.Default.GetString(downBytes);
Console.WriteLine("传输数据:" + context);
ctx.Response.OutputStream.Write(downBytes, 0, downBytes.Length);
ctx.Response.Close();
}
}
}
