Asp.net(c#)实现多线程断点续传
来源:互联网 发布:apache 监听外网ip 编辑:程序博客网 时间:2024/06/03 14:25
Asp.net(c#)实现多线程断点续传
http://www.cnblogs.com/bestcomy/archive/2004/08/10/31950.html
以前一直错误的认为在ASP.NET中无法通过编程方式实现多线程断点续传,今天终于获得了这样一个解决方案,让我明白要学习的东西还很多。
此解决方案基于其它解决方案及相关资料,根据我自己的理解改进.如有错漏,请尽管指出;如有其它更好的解决方案,请推荐一下,感谢先。
System.IO.Stream iStream = null;
// Buffer to read 10K bytes in chunk:
byte[] buffer = new Byte[10240];
// Length of the file:
int length;
// Total bytes to read:
long dataToRead;
// Identify the file to download including its path.
string filepath = @"E:/software/SQL Server 2000 Personal Edition.ISO";
// Identify the file name.
string filename = System.IO.Path.GetFileName(filepath);
try
{
// Open the file.
iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,
System.IO.FileAccess.Read,System.IO.FileShare.Read);
Response.Clear();
// Total bytes to read:
dataToRead = iStream.Length;
long p = 0;
if(Request.Headers["Range"]!=null)
{
Response.StatusCode = 206;
p = long.Parse( Request.Headers["Range"].Replace("bytes=","").Replace("-",""));
}
if(p != 0)
{
Response.AddHeader("Content-Range","bytes " + p.ToString() + "-" + ((long)(dataToRead - 1)).ToString() + "/" + dataToRead.ToString());
}
Response.AddHeader("Content-Length",((long)(dataToRead-p)).ToString());
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=" + System.Web.HttpUtility.UrlEncode(Request.ContentEncoding.GetBytes(filename)));
iStream.Position = p;
dataToRead = dataToRead - p;
// Read the bytes.
while (dataToRead > 0)
{
// Verify that the client is connected.
if (Response.IsClientConnected)
{
// Read the data in buffer.
length = iStream.Read(buffer, 0, 10240);
// Write the data to the current output stream.
Response.OutputStream.Write(buffer, 0, length);
// Flush the data to the HTML output.
Response.Flush();
buffer= new Byte[10240];
dataToRead = dataToRead - length;
}
else
{
//prevent infinite loop if user disconnects
dataToRead = -1;
}
}
}
catch (Exception ex)
{
// Trap the error, if any.
Response.Write("Error : " + ex.Message);
}
finally
{
if (iStream != null)
{
//Close the file.
iStream.Close();
}
Response.End();
}
// Buffer to read 10K bytes in chunk:
byte[] buffer = new Byte[10240];
// Length of the file:
int length;
// Total bytes to read:
long dataToRead;
// Identify the file to download including its path.
string filepath = @"E:/software/SQL Server 2000 Personal Edition.ISO";
// Identify the file name.
string filename = System.IO.Path.GetFileName(filepath);
try
{
// Open the file.
iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,
System.IO.FileAccess.Read,System.IO.FileShare.Read);
Response.Clear();
// Total bytes to read:
dataToRead = iStream.Length;
long p = 0;
if(Request.Headers["Range"]!=null)
{
Response.StatusCode = 206;
p = long.Parse( Request.Headers["Range"].Replace("bytes=","").Replace("-",""));
}
if(p != 0)
{
Response.AddHeader("Content-Range","bytes " + p.ToString() + "-" + ((long)(dataToRead - 1)).ToString() + "/" + dataToRead.ToString());
}
Response.AddHeader("Content-Length",((long)(dataToRead-p)).ToString());
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment; filename=" + System.Web.HttpUtility.UrlEncode(Request.ContentEncoding.GetBytes(filename)));
iStream.Position = p;
dataToRead = dataToRead - p;
// Read the bytes.
while (dataToRead > 0)
{
// Verify that the client is connected.
if (Response.IsClientConnected)
{
// Read the data in buffer.
length = iStream.Read(buffer, 0, 10240);
// Write the data to the current output stream.
Response.OutputStream.Write(buffer, 0, length);
// Flush the data to the HTML output.
Response.Flush();
buffer= new Byte[10240];
dataToRead = dataToRead - length;
}
else
{
//prevent infinite loop if user disconnects
dataToRead = -1;
}
}
}
catch (Exception ex)
{
// Trap the error, if any.
Response.Write("Error : " + ex.Message);
}
finally
{
if (iStream != null)
{
//Close the file.
iStream.Close();
}
Response.End();
}
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)实现多线程断点续传
- Asp.net(c#)二进制上传 and 实现多线程断点续传
- Asp.net(c#)二进制上传 and 实现多线程断点续传
- Asp.net(c#)实现多线程断点续传下载大文件
- Net/C#: 实现支持断点续传多线程下载2
- 使文件下载的自定义连接支持 FlashGet 的断点续传多线程链接下载! C#/ASP.Net 实现!
- Cisco 2950G 802.1X+AD+CA+IAS进行RADIUS身份验证
- Website Security 网站安全(译自:《Apress.Beginning.ASP.NET.2.0.in.C.Sharp.2005.From.Novice.to.Professional》)
- C#.Net 较完美随机验证码
- WEB打印
- 《三字经》全文解释
- Asp.net(c#)实现多线程断点续传
- 为自己减刑
- API之位图、图标和光栅运算函数
- SQL SERVER 2005 EXPRESS 连接字符串
- ASP.NET 2.0中CSS失效解决方案
- 算法导论中英文版下载
- 用web.xml控制Web应用的行为( 限制对Web资源的访问)
- WebService 操作超时的问题及其解决办法
- 字体Font的使用