private void DownloadDataCallback(object s, AsyncCompletedEventArgs e)
{
MessageBox.Show($"Download finished successful to {label1.Text} path");
// run delegate methods here => DownloadDataCallback and Install methods will be invoked here
DownloadEvent?.Invoke();
if (checkBox5.Checked)
{
InstallAllDownloadedTools();
}
}
} = false; //表示下载是否完成
/// <summary>
/// 下载方法(断点续传)
/// </summary>
/// <param name="url">URL下载地址</param>
/// <param name="savePath">Save path保存路径</param>
/// <param name="callBack">Call back回调函数</param>
public void DownLoad(string url, string savePath)
{
isStop = false;
Timer.ShowLog = false;
ThreadStart DownLoadHandler = () =>
{
//判断保存路径是否存在
if (!Directory.Exists(savePath))
{
Directory.CreateDirectory(savePath);
}
//这是要下载的文件名，比如从服务器下载a.zip到D盘，保存的文件名是test
string filePath = savePath + "/test";
float progress = 0;
//使用流操作文件
FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Write);
//获取文件现在的长度
long fileLength = fs.Length;
//获取下载文件的总长度
long totalLength = GetLength(url);
//如果没下载完
if (fileLength < totalLength)
{
//断点续传核心，设置本地文件流的起始位置
fs.Seek(fileLength, SeekOrigin.Begin);
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
//断点续传核心，设置远程访问文件流的起始位置
request.AddRange((int)fileLength);
Stream stream = request.GetResponse().GetResponseStream();
byte[] buffer = new byte[1024];
//使用流读取内容到buffer中
//注意方法返回值代表读取的实际长度,并不是buffer有多大，stream就会读进去多少
int length = stream.Read(buffer, 0, buffer.Length);
while (length > 0)
{
//如果Unity客户端关闭，停止下载
if (isStop)
{
break;
}
//将内容再写入本地文件中
fs.Write(buffer, 0, length);
//计算进度
fileLength += length;
progress = (float)fileLength / (float)totalLength;
//Loom.QueueOnMainThread((v) =>
//{
// OnDownLoadUpdate?.Invoke(progress);
//},null);
Timer.AddTimer(0, "ForUpdateEvent", true).OnCompleted(() =>
{
OnDownLoadUpdate?.Invoke(progress);
});
//类似尾递归
length = stream.Read(buffer, 0, buffer.Length);
}
stream.Close();
stream.Dispose();
}
else
{
progress = 1;
}
fs.Close();
fs.Dispose();
//如果下载完毕，执行回调
if (progress == 1)
{
isDone = true;
Timer.DelTimer("ForUpdateEvent");
Timer.AddTimer(0, "ForOnCompleteEvent").OnCompleted(() =>
{
OnDownLoadCompleted?.Invoke();
});
}
};
thread = new Thread(DownLoadHandler); //开启子线程下载,使用匿名方法
thread.IsBackground = true; //开启子线程
thread.Start();
}