internal static void WriteStatusLine(StreamWriter writer, HttpResponse response)
{
const string statusLineFormat = "HTTP/{0} {1} {2}";
writer.WriteLine(statusLineFormat,
response.ProtocolVersion,
response.StatusCode,
HttpReasonPhrase.GetStatusDescription(response.StatusCode));
writer.Flush();
}
internal static void WriteHeaders(StreamWriter writer, HttpResponse response)
{
writer.WriteLine("Date: {0}", DateTime.Now.ToUniversalTime().ToString("R"));
writer.WriteLine("Server: ShareIT");
foreach (var header in response.Headers.AllKeys)
{
var value = response.Headers.Get(header);
if (string.IsNullOrEmpty(value)) continue;
writer.WriteLine("{0}: {1}", header, value);
}
writer.WriteLine();
writer.Flush();
}
private void AcceptTcpClient(IAsyncResult asyncResult)
{
var l = asyncResult.AsyncState as TcpListener;
if (l == null) return;
TcpClient client;
try
{
client = l.EndAcceptTcpClient(asyncResult);
ThreadPool.QueueUserWorkItem(tcpClient =>
{
HttpResponse response;
try
{
var context = new HttpContext(client);
if (RequestReceived != null)
{
RequestReceived(this, context);
if (!context.IsHandled)
{
context.Response.StatusCode = (int) HttpStatusCode.NotFound;
}
}
response = context.Response;
}
catch (HttpParseException e)
{
Logger.Error(e, "QueueUserWorkItem: Caught parsing exception with return code {0}", e.ReturnCode);
response = new HttpResponse(e.ReturnCode);
}
catch (Exception e)
{
Logger.Error(e, "QueueUserWorkItem: Caught unexpected exception.");
client.Close();
return;
}
if (response != null)
{
WriteResponse(response);
}
client.Close();
}, client);
}
catch
{
// ignored
}
finally
{
l.BeginAcceptTcpClient(AcceptTcpClient, l);
}
}
internal static void WriteContent(HttpResponse response)
{
if (response.OutputStream == null)
{
throw new ArgumentException("The underlying stream of response is null.", "response");
}
if (!response.OutputStream.CanRead)
{
throw new ArgumentException("The underlying stream of response cannot be read.", "response");
}
using (var reader = new BinaryReader(response.OutputStream))
using (var writer = new BinaryWriter(response.UnderlyingStream))
{
var buffer = new byte[response.BlockSize];
while (true)
{
var read = reader.Read(buffer, 0, response.BlockSize);
if (read > 0)
{
writer.Write(buffer, 0, read);
writer.Flush();
if (response.ContentTransferredChanged != null)
{
response.ContentTransferredChanged(read);
}
}
else
{
break;
}
}
}
}
private void WriteResponse(HttpResponse response)
{
try
{
var stream = response.UnderlyingStream;
if (stream == null)
{
throw new ArgumentException("The underlying stream of response is null.", "response");
}
if (!stream.CanWrite)
{
throw new ArgumentException("The underlying stream of response cannot be written.", "response");
}
var encoding = new UTF8Encoding(false);
using (var writer = new StreamWriter(stream, encoding) { NewLine = "\r\n", AutoFlush = true })
{
HttpResponseWriter.WriteStatusLine(writer, response);
HttpResponseWriter.WriteHeaders(writer, response);
if (response.TransferBegan != null)
{
response.TransferBegan();
}
if (response.ContentLength64 != -1)
{
HttpResponseWriter.WriteContent(response);
}
}
}
catch (Exception e)
{
Logger.Error(e, "WriteResponse: Caught unexpected exception.");
}
if (response.TransferEnded != null)
{
try
{
response.TransferEnded();
}
catch (Exception e)
{
Logger.Error(e, "WriteResponse: TransferEnded: Caught unexpected exception.");
}
}
}
