这个想法很简单,我正在创建一项服务,用户可以在另一个网站上放置一个文件的直接链接,我的程序将打开一个流到该远程服务器并开始以字节读取文件然后将每个读取的字节返回给用户。恢复下载
到目前为止,我设法让该工作,这里是我的代码
public void Index()
{
//Create a stream for the file
Stream stream = null;
//This controls how many bytes to read at a time and send to the client
int bytesToRead = 10000; //10000
// Buffer to read bytes in chunk size specified above
byte[] buffer = new Byte[bytesToRead];
// The number of bytes read
try
{
//Create a WebRequest to get the file
HttpWebRequest fileReq = (HttpWebRequest)HttpWebRequest.Create("http://SOME-OTHER-SERVER.com/File.rar");
//Create a response for this request
HttpWebResponse fileResp = (HttpWebResponse)fileReq.GetResponse();
if (fileReq.ContentLength > 0)
fileResp.ContentLength = fileReq.ContentLength;
//Get the Stream returned from the response
stream = fileResp.GetResponseStream();
// prepare the response to the client. resp is the client Response
var resp = HttpContext.Response;
//Indicate the type of data being sent
resp.ContentType = "application/octet-stream";
//Name the file
resp.AddHeader("Content-Disposition", "attachment; filename=\"" + "fle.rar" + "\"");
resp.AddHeader("Content-Length", (fileResp.ContentLength).ToString());
int length;
do
{
// Verify that the client is connected.
if (resp.IsClientConnected)
{
// Read data into the buffer.
length = stream.Read(buffer, 0, bytesToRead);
// and write it out to the response's output stream
resp.OutputStream.Write(buffer, 0, length);
// Flush the data
resp.Flush();
//Clear the buffer
buffer = new Byte[bytesToRead];
}
else
{
// cancel the download if client has disconnected
length = -1;
}
} while (length > 0); //Repeat until no data is read
}
finally
{
if (stream != null)
{
//Close the input stream
stream.Close();
}
}
}
当我去到我的网页它下载完美,但问题是,如果我停止下载,不会再恢复。
我搜索了这个问题,发现有一个头文件“Accept-Ranges”必须在连接中定义以支持简历。
所以我添加了标题,但没有工作。
非常感谢,这是一个完美的答案:) – BOSS 2013-10-15 13:12:54