这个想法很简单，我正在创建一个服务，用户可以在其中放置托管在另一个网站上的文件的直接链接，我的程序将打开一个流到该远程服务器并开始以字节为单位读取文件，然后返回每个读取的文件字节给用户。
到目前为止，我设法让它工作，这是我的代码
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();
}
}
}
当我转到我的页面时，它会完美下载，但问题是如果我停止下载，它将不会再次恢复。
我搜索了该问题并发现必须在连接中定义一个标头“Accept-Ranges”以支持恢复。
所以我添加了那个标题但没有用。