/// <summary>
/// Http方式接收一个区块
/// </summary>
//private void ReceiveHttp(object threadId)
private void ReceiveHttp(object thread)
{
//int ThreadId = (int)threadId;
ThreadInfo currentThread = (ThreadInfo)thread;
//string filename = fileNames[ThreadId]; // 线程临时文件
byte[] buffer = new byte[bufferSize]; // 接收缓冲区
int readSize = 0; // 接收字节数
//FileStream fs = new FileStream(filename, System.IO.FileMode.Create);
FileStream fs = new FileStream(currentThread.TmpFileName, System.IO.FileMode.Create);
Stream ns = null;
try
{
//HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
//request.AddRange(StartPos[ThreadId], StartPos[ThreadId] + fileSize[ThreadId]);
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(currentThread.Url);
request.AddRange(currentThread.StartPosition, currentThread.StartPosition + currentThread.FileSize);
ns = request.GetResponse().GetResponseStream();
readSize = ns.Read(buffer, 0, bufferSize);
while (readSize > 0)
{
fs.Write(buffer, 0, readSize);
//sumOfThreads[currentThread.ThreadId] += readSize;
readSize = ns.Read(buffer, 0, bufferSize);
//lock (lockPercent)
// {
receiveSize += readSize;
double percent = (double)receiveSize / (double)fileSizeAll * 100;
OnDownloadingPercent(percent); //触发下载进度事件
//}
}
}
catch //这里不用处理异常，如果等待超时了，会自动继续等待到可以下载为止
{
//throw ex;
}
finally
{
if (fs != null)
{
fs.Close();
}
if (ns != null)
{
ns.Close();
}
}
//threadStatus[currentThread.ThreadId] = true;
currentThread.ThreadStatus = true;
}
/// <summary>
/// 方式多线程下载一个文件
/// </summary>
/// <param name="srcFileUrl">文件地址</param>
/// <param name="destFileName">保存全名</param>
/// <param name="maxThreadNum">线程数</param>
/// <param name="rowIndex">任务索引</param>
//public void DownloadFile(string srcFileUrl, string destFileName, int maxThreadNum, int rowIndex)
//{
// if (srcFileUrl.StartsWith("http://", StringComparison.InvariantCultureIgnoreCase))
// {
// DownloadHttpFile(srcFileUrl, destFileName, maxThreadNum, rowIndex);
// }
//}
/// <summary>
/// Http方式多线程下载一个文件
/// </summary>
/// <param name="srcFileUrl">文件地址</param>
/// <param name="destFileName">保存全名</param>
/// <param name="maxThreadNum">线程数</param>
/// <param name="rowIndex">任务索引</param>
//public void DownloadFile(string srcFileUrl, string destFileName, int maxThreadNum, int rowIndex)
public void DownloadFile(List<string> srcFileUrl, string destFileName, int maxThreadNum, int rowIndex)
{
OnGetStartTime(DateTime.Now);
//Url = srcFileUrl;
Urls = srcFileUrl;
DestFileName = destFileName;
RowIndex = rowIndex;
threadNum = maxThreadNum;//多少个线程下载
receiveSize = 0;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(this.Urls[0]);
fileSizeAll = request.GetResponse().ContentLength;
request.Abort();
OnUpdateSrcFileSize(0, fileSizeAll);
//初始化多线程，每个线程平均分配文件大小，剩余部分由最后一个线程完成
//threadStatus = new bool[threadNum];
//fileNames = new string[threadNum];
//StartPos = new int[threadNum];
//fileSize = new int[threadNum];
//threadinfos = new ThreadInfo[threadNum];
int filethread = (int)fileSizeAll / threadNum;
int filethreadEnd = filethread + (int)fileSizeAll % threadNum;
for (int i = 0; i < threadNum; i++)
{
//sumOfThreads.Add(0);
//threadStatus[i] = false;
ThreadInfo currentThread = new ThreadInfo();
//threadinfos[i].ThreadId = i;
//threadinfos[i].ThreadStatus = false;
//threadinfos[i].TmpFileName = string.Format("{0}_{1}.tmp", DestFileName, i);
//threadinfos[i].Url = Urls[i % Urls.Count];
currentThread.ThreadId = i;
currentThread.ThreadStatus = false;
currentThread.TmpFileName = string.Format("{0}_{1}.tmp", DestFileName, i);
currentThread.Url = Urls[i % Urls.Count];
//fileNames[i] = string.Format("{0}_{1}.tmp", DestFileName, i);
if (i < threadNum - 1)
{
//StartPos[i] = filethread * i;
//fileSize[i] = filethread - 1;
currentThread.StartPosition = filethread * i;
currentThread.FileSize = filethread - 1;
}
else
{
//StartPos[i] = filethread * i;
//fileSize[i] = filethreadEnd - 1;
currentThread.StartPosition = filethread * i;
currentThread.FileSize = filethreadEnd - 1;
}
threadinfos.Add(currentThread);
}
// 定义并启动线程数组
for (int i = 0; i < threadinfos.Count; i++)
{
ThreadPool.QueueUserWorkItem(new WaitCallback(ReceiveHttp), threadinfos[i]);
}
//启动合并线程
ThreadPool.QueueUserWorkItem(new WaitCallback(MergeFile), null);
}
/// <summary>
/// 方式多线程下载一个文件
/// </summary>
/// <param name="srcFileUrl">文件地址</param>
/// <param name="destFileName">保存全名</param>
/// <param name="maxThreadNum">线程数</param>
/// <param name="rowIndex">任务索引</param>
//public void DownloadFile(string srcFileUrl, string destFileName, int maxThreadNum, int rowIndex)
//{
// if (srcFileUrl.StartsWith("http://", StringComparison.InvariantCultureIgnoreCase))
// {
// DownloadHttpFile(srcFileUrl, destFileName, maxThreadNum, rowIndex);
// }
//}
/// <summary>
/// Http方式多线程下载一个文件
/// </summary>
/// <param name="srcFileUrl">文件地址</param>
/// <param name="destFileName">保存全名</param>
/// <param name="maxThreadNum">线程数</param>
/// <param name="rowIndex">任务索引</param>
//public void DownloadFile(string srcFileUrl, string destFileName, int maxThreadNum, int rowIndex)
public void DownloadFile(List <string> srcFileUrl, string destFileName, int maxThreadNum, int rowIndex)
{
OnGetStartTime(DateTime.Now);
//Url = srcFileUrl;
Urls = srcFileUrl;
DestFileName = destFileName;
RowIndex = rowIndex;
threadNum = maxThreadNum;//多少个线程下载
receiveSize = 0;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(this.Urls[0]);
fileSizeAll = request.GetResponse().ContentLength;
request.Abort();
OnUpdateSrcFileSize(0, fileSizeAll);
//初始化多线程，每个线程平均分配文件大小，剩余部分由最后一个线程完成
//threadStatus = new bool[threadNum];
//fileNames = new string[threadNum];
//StartPos = new int[threadNum];
//fileSize = new int[threadNum];
//threadinfos = new ThreadInfo[threadNum];
int filethread = (int)fileSizeAll / threadNum;
int filethreadEnd = filethread + (int)fileSizeAll % threadNum;
for (int i = 0; i < threadNum; i++)
{
//sumOfThreads.Add(0);
//threadStatus[i] = false;
ThreadInfo currentThread = new ThreadInfo();
//threadinfos[i].ThreadId = i;
//threadinfos[i].ThreadStatus = false;
//threadinfos[i].TmpFileName = string.Format("{0}_{1}.tmp", DestFileName, i);
//threadinfos[i].Url = Urls[i % Urls.Count];
currentThread.ThreadId = i;
currentThread.ThreadStatus = false;
currentThread.TmpFileName = string.Format("{0}_{1}.tmp", DestFileName, i);
currentThread.Url = Urls[i % Urls.Count];
//fileNames[i] = string.Format("{0}_{1}.tmp", DestFileName, i);
if (i < threadNum - 1)
{
//StartPos[i] = filethread * i;
//fileSize[i] = filethread - 1;
currentThread.StartPosition = filethread * i;
currentThread.FileSize = filethread - 1;
}
else
{
//StartPos[i] = filethread * i;
//fileSize[i] = filethreadEnd - 1;
currentThread.StartPosition = filethread * i;
currentThread.FileSize = filethreadEnd - 1;
}
threadinfos.Add(currentThread);
}
// 定义并启动线程数组
for (int i = 0; i < threadinfos.Count; i++)
{
ThreadPool.QueueUserWorkItem(new WaitCallback(ReceiveHttp), threadinfos[i]);
}
//启动合并线程
ThreadPool.QueueUserWorkItem(new WaitCallback(MergeFile), null);
}
