public static int WriteWebSocketUpgradeResponse(WebSocketUpgradeResponse response, MemoryStream ms)
{
var bytesWritten = 0;
bytesWritten += ms.WriteAsciiFormat("HTTP/1.1 {0} {1}\r\n", (int)response.StatusCode, response.StatusDescription);
bytesWritten += ms.WriteAsciiFormat("Server: {0}\r\n", Server);
bytesWritten += ms.WriteAsciiFormat("Date: {0}\r\n", DateTime.UtcNow.ToString("R"));
var acceptResponse = response as WebSocketUpgradeResponse.AcceptUpgradeResponse;
if (acceptResponse != null)
{
var acceptKey = Encoding.UTF8.GetBytes(acceptResponse.RequestKey + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11");
var acceptKeyHash = Convert.ToBase64String(SHA1.Create().ComputeHash(acceptKey));
bytesWritten += ms.WriteAscii("Connection: upgrade\r\n");
bytesWritten += ms.WriteAscii("Upgrade: websocket\r\n");
bytesWritten += ms.WriteAsciiFormat("Sec-WebSocket-Accept: {0}\r\n", acceptKeyHash);
}
else // Reject
{
bytesWritten += ms.WriteAscii("Connection: close\r\n");
}
bytesWritten += ms.Write(CRLF);
return bytesWritten;
}
public static int Write(HttpResponse response, MemoryStream ms, int keepAlives, TimeSpan keepAliveTimeout)
{
var bytesWritten = 0;
bytesWritten += ms.WriteAsciiFormat("HTTP/1.1 {0} {1}\r\n", (int)response.StatusCode, response.StatusDescription);
bytesWritten += ms.WriteAsciiFormat("Server: {0}\r\n", Server);
bytesWritten += ms.WriteAsciiFormat("Date: {0}\r\n", DateTime.UtcNow.ToString("R"));
if (!string.IsNullOrEmpty(response.ContentType))
{
bytesWritten += ms.WriteAsciiFormat("Content-Type: {0}\r\n", response.ContentType);
}
var contentLength = response.Body == null ? 0 : response.Body.Length;
bytesWritten += ms.WriteAsciiFormat("Content-Length: {0}\r\n", contentLength);
var headers = response.Headers;
if (headers?.Count > 0)
{
foreach (var kvp in headers) //TODO: duplicate handling with fixed headers
{
bytesWritten += ms.WriteAsciiFormat("{0}: {1}\r\n", kvp.Key, kvp.Value);
}
}
if (keepAlives > 0)
{
bytesWritten += ms.WriteAsciiFormat("Connection: keep-alive\r\n", keepAlives);
bytesWritten += ms.WriteAsciiFormat("Keep-Alive: timeout={0},max={1}\r\n", (int)keepAliveTimeout.TotalSeconds, keepAlives);
}
else
{
bytesWritten += ms.WriteAsciiFormat("Connection: close\r\n", keepAlives);
}
bytesWritten += ms.Write(CRLF);
if (contentLength > 0)
{
bytesWritten += ms.Write(response.Body);
}
return bytesWritten;
}
