public override void Start()
{
if (!(DownLoadUrl != null && FilePath != null && FileName != null && ThreadNum != 0))
{
return;
}
Running = true;
try
{
State = "下载中";
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(DownLoadUrl);
HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
contentLength = httpWebResponse.ContentLength;
threads = new DownloadThread[ThreadNum];
long q = contentLength / ThreadNum;
new Thread(SpeedStatistics).Start();
for (int i = 0; i < ThreadNum; i++)
{
if (i == (ThreadNum - 1))
{
threads[i] = new DownloadThread
{
Url = DownLoadUrl,
FileName = FilePath + "\\" + FileName + "._tmp" + i.ToString(),
From = q * i,
To = contentLength,
download = this
};
break;
}
threads[i] = new DownloadThread
{
Url = DownLoadUrl,
FileName = FilePath + "\\" + FileName + "._tmp" + i.ToString(),
From = q * i,
To = (q * (i + 1)) - 1,
download = this
};
}
}
catch (Exception ex)
{
State = "下载失败";
SetComplete();
MessageBox.Show($"下载失败! 错误: {ex.Message} \r\n如果以上错误为404的话 那就是文件名非法\r\n百度云的API并不允许下载有特殊字符的文件名");
}
}
private void HttpDownload_DownloadCompletedEvent(DownloadThread thread)
{
lock (this)
{
bool flag = false;
foreach (DownloadThread thr in threads)
{
if (thr.Equals(thread))
{
continue;
}
if (!thr.Completed)
{
flag = true;
}
}
if (flag)
{
return;
}
if (Stop)
{
return;
}
string[] files = new string[threads.Length];
for (int i = 0; i < threads.Length; i++)
{
files[i] = threads[i].DownloadPath;
}
State = TaskState.合并文件中;
FileOperation.CombineFiles(files, FilePath + "\\" + FileName);
Running = false;
TaskComplete = true;
State = TaskState.载完成;
TaskCompletedEvent?.Invoke();
}
}
public override void Start()
{
if (!(DownLoadUrl != null && FilePath != null && FileName != null && ThreadNum != 0))
{
return;
}
Running = true;
try
{
State = TaskState.载中;
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(DownLoadUrl);
HttpWebResponse httpWebResponse = (HttpWebResponse)httpWebRequest.GetResponse();
contentLength = httpWebResponse.ContentLength;
threads = new DownloadThread[ThreadNum];
if (From == To)
{
From = 0;
To = contentLength;
}
else
{
contentLength = To - From;
}
long q = contentLength / ThreadNum;
for (int i = 0; i < ThreadNum; i++)
{
if (i == (ThreadNum - 1))
{
threads[i] = new DownloadThread
{
Url = DownLoadUrl,
DownloadPath = FilePath + "\\" + FileName + "._tmp" + i.ToString(),
From = From + (q * i),
To = To
};
threads[i].DownloadCompletedEvent += HttpDownload_DownloadCompletedEvent;
break;
}
threads[i] = new DownloadThread
{
Url = DownLoadUrl,
DownloadPath = FilePath + "\\" + FileName + "._tmp" + i.ToString(),
From = From + (q * i),
To = From + (q * (i + 1) - 1),
};
threads[i].DownloadCompletedEvent += HttpDownload_DownloadCompletedEvent;
}
}
catch (Exception ex)
{
State = TaskState.任务失败;
SetComplete();
if (ex is WebException)
{
//404 ERROR
if (ex.Message.Contains("404"))
{
MessageBox.Show("下载失败! 文件名有非法字符,请使用云管家重命名后再下载");
return;
}
//403 ERROR
if (ex.Message.Contains("403"))
{
MessageBox.Show("下载失败! 百度抽风了,你可以换个账号或者等几天再下载\r\nPS:一般来说等一天就好");
return;
}
}
MessageBox.Show($"下载失败! 错误: {ex.Message}");
}
}