private void RespondWithFile(File422 file, WebRequest req)
{
StringBuilder resp = new StringBuilder();
string ext = Path.GetExtension(file.Name).ToLower();
var fileStream = file.OpenReadOnly();
int bytesRead = -1;
byte[] buffer = new byte[8192];
string contentType = "text/plain";
string statusCode = "200 OK";
long rangeBegin = 0;
long rangeEnd = (fileStream.Length - 1);
long contentLength = fileStream.Length - 1;
if (req.getHeader("range") != null)
{
statusCode = "206 Partial Content";
// need to determine what bytes they want
string r = req.getHeader("range");
string[] firstSplit = r.Split('=');
//firstSplit[1] now has the range
string[] range = firstSplit[1].Split(new char[] { '-' }, StringSplitOptions.RemoveEmptyEntries);
//now range should have two pieces if it is a range
// one piece if it is requesting from front or back of file
// determine where the - is to figure out which, this is stored in firstSplit[1] still
long a = 0;
long b = 0;
if (range.Length == 2)
{
long.TryParse(range[0], out a);
long.TryParse(range[1], out b);
rangeBegin = a;
rangeEnd = b;
}
else
{
if (firstSplit[1][0] == '-')
{
//wants the back of the file
long.TryParse(range[0], out a);
rangeBegin = (fileStream.Length - 1 - a);
rangeEnd = (fileStream.Length - 1);
}
else
{
// wants the front of the file
long.TryParse(range[0], out a);
rangeBegin = a;
rangeEnd = (fileStream.Length - 1);
}
}
contentLength = rangeEnd - rangeBegin;
}
// determine type of file
if (ext == ".jpeg" || ext == ".jpg")
{
contentType = "image/jpeg";
}
else if (ext == ".png")
{
contentType = "image/png";
}
else if (ext == ".pdf")
{
contentType = "application/pdf";
}
else if (ext == ".mp4")
{
contentType = "video/mp4";
}
else if (ext == ".txt")
{
contentType = "text/plain";
}
else if (ext == ".html")
{
contentType = "text/html";
}
else if (ext == ".xml")
{
contentType = "application/xml";
}
if (contentLength == 0)
{
contentLength = 1;
}
resp.Append("HTTP/1.1 " + statusCode + "\r\nContent-Type:" + contentType + "\r\n" + "Content-Length:" + contentLength.ToString() + "\r\nAccept-Ranges: bytes\r\n");
if (req.getHeader("range") != null)
{
// add on content-range
resp.Append("Content-Range: bytes " + rangeBegin.ToString() + "-" + rangeEnd.ToString() + "/" + fileStream.Length.ToString() + "\r\n");
}
resp.Append("\r\n");
Console.WriteLine("RESPONSE");
Console.WriteLine(resp.ToString());
req.WriteFileResponse(Encoding.ASCII.GetBytes(resp.ToString()));
if (req.getHeader("range") != null)
{
fileStream.Position = rangeBegin;
while (bytesRead != 0)
{
try{
int readAmmount = Convert.ToInt32(Math.Max(buffer.Length, fileStream.Position - rangeEnd));
bytesRead = fileStream.Read(buffer, 0, readAmmount);
req.WriteFileResponse(buffer);
}
catch {
}
}
}
else
{
while (bytesRead != 0)
{
try{
bytesRead = fileStream.Read(buffer, 0, buffer.Length);
req.WriteFileResponse(buffer);
}
catch {
}
}
}
return;
}
