Я пытаюсь создать простой сервер WebSockets со следующим:
namespace ConsoleWebSocketServer
{
class Program
{
const string c_MagicKey = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
static void Main(string[] args)
{
TcpListener l_Listener = new TcpListener(IPAddress.Loopback, 8181);
l_Listener.Start();
while (true)
{
using (TcpClient l_Client = l_Listener.AcceptTcpClient())
using (NetworkStream l_Stream = l_Client.GetStream())
{
var l_headers = new Dictionary<string, string>();
string l_line = string.Empty;
while ((l_line = ReadLine(l_Stream)) != string.Empty)
{
var tokens = l_line.Split(new char[] { ':' }, 2);
if (!string.IsNullOrWhiteSpace(l_line) && tokens.Length > 1)
{
l_headers[tokens[0]] = tokens[1].Trim();
}
}
string l_secKey = l_headers["Sec-WebSocket-Key"];
string l_responseSecKey = ComputeWebSocketHandshakeSecurityHash09(l_secKey);
string l_response =
"HTTP/1.1 101 Switching Protocols" + Environment.NewLine +
"Upgrade: websocket" + Environment.NewLine +
"Connection: Upgrade" + Environment.NewLine +
"Sec-WebSocket-Accept: " + l_responseSecKey + Environment.NewLine + Environment.NewLine;
var l_bufferedResponse = Encoding.UTF8.GetBytes(l_response);
l_Stream.Write(l_bufferedResponse, 0, l_bufferedResponse.Length);
}
}
}
public static string ComputeWebSocketHandshakeSecurityHash09(string secWebSocketKey)
{
string secWebSocketAccept = null; ;
string l_combinedKey = secWebSocketKey + c_MagicKey;
SHA1 l_Sha1Crypto = new SHA1CryptoServiceProvider();
byte[] l_sha1Hash = l_Sha1Crypto.ComputeHash(Encoding.UTF8.GetBytes(l_combinedKey));
secWebSocketAccept = Convert.ToBase64String(l_sha1Hash);
return secWebSocketAccept ?? String.Empty;
}
static string ReadLine(Stream stream)
{
var l_Sb = new StringBuilder();
var l_buffer = new List<byte>();
while (true)
{
l_buffer.Add((byte)stream.ReadByte());
string l_line = Encoding.ASCII.GetString(l_buffer.ToArray());
if (l_line.EndsWith(Environment.NewLine))
{
return l_line.Substring(0, l_line.Length - 2);
}
}
}
}
}
И я тестирую его на простой странице, которая выполняет следующее:
function testWebSocket() {
if (!window.WebSocket) {
alert('WebSockets are NOT supported by your browser.');
return;
}
var ws = new WebSocket('ws://localhost:8181/demo');
ws.onopen = function() {
alert('Handshake successfully established. Ready for data...');
};
ws.onmessage = function (e) {
alert('Got WebSockets message: ' + e.data);
}
ws.onclose = function() {
alert('Connection closed.');
};
}
Я вижу только предупреждение "Рукопожатие", за которым сразу же следует сообщение "Закрыто". Я что-то упустил?