private void RespondWithFile(File422 file, WebRequest req)
{
Stream fs = file.OpenReadOnly();
if (req.Headers.ContainsKey("range"))
{
WriteWithRangeHeader(file, fs, req);
return;
}
// Send response code and headers
string response = "HTTP/1.1 200 OK\r\n" +
"Content-Length: " + fs.Length + "\r\n" +
"Content-Type: " + file.GetContentType() + "\r\n\r\n";
byte[] responseBytes = Encoding.ASCII.GetBytes(response);
req.WriteResponse(responseBytes, 0, responseBytes.Length);
while (true)
{
byte[] buf = new byte[4096];
int read = fs.Read(buf, 0, buf.Length);
if (read == 0)
{
break;
}
req.WriteResponse(buf, 0, read);
}
fs.Close();
}
/// <summary>
/// Writes the with range header.
/// </summary>
private void WriteWithRangeHeader(File422 file, Stream fs, WebRequest req)
{
String[] ranges = req.Headers["range"].Trim().Substring("byte= ".Length).Split('-');
long from;
Int64.TryParse(ranges[0], out from);
if (fs.Length <= from)
{
string invalid = "HTTP/1.1 416 Requested Range Not Satisfiable\r\n\r\n";
byte[] invalidResponseBytes = Encoding.ASCII.GetBytes(invalid);
req.WriteResponse(invalidResponseBytes, 0, invalidResponseBytes.Length);
}
long to;
if (ranges[1] != string.Empty)
{
Int64.TryParse(ranges[1], out to);
}
else
{
to = fs.Length - 1;
}
// Send response code and headers
string response = "HTTP/1.1 206 Partial content\r\n" +
"Content-Range: bytes " + from.ToString() + "-" + to.ToString() + "/" + fs.Length.ToString() + "\r\n" +
"Content-Length: " + (to + 1 - from).ToString() + "\r\n" +
"Content-Type: " + file.GetContentType() + "\r\n\r\n";
byte[] responseBytes = Encoding.ASCII.GetBytes(response);
req.WriteResponse(responseBytes, 0, responseBytes.Length);
fs.Seek(from, SeekOrigin.Begin);
while (true)
{
byte[] buf = new byte[4096];
int read = 0;
read = fs.Read(buf, 0, buf.Length);
if (read == 0)
{
break;
}
req.WriteResponse(buf, 0, read);
if (fs.Position >= to)
{
break;
}
}
fs.Close();
}