public static void Main(string[] args)
{
DebugWriter.Clear();
DebugWriter.Write("Starting...");
DebugWriter.Write("Running Server...");
Task t = Server.SetupServer();
DebugWriter.Write("Running App...");
BuildWebHost(args).Run();
t.Wait();
//Task.Run(() => { Server.SetupServer(); });
}
public static async Task SetupServer()
{
DebugWriter.Write("Intro to SetupServer");
DebugWriter.Write("Making Server...");
TcpListener server = new TcpListener(IPAddress.Parse("52.138.196.70"), 443);
DebugWriter.Write("Starting Server...");
server.Start();
DebugWriter.Write("Server has started on 52.138.196.70:443. -- Waiting for a connection...");
TcpClient client = server.AcceptTcpClient();
DebugWriter.Write("A client connected.");
NetworkStream stream = client.GetStream();
//enter to an infinite cycle to be able to handle every change in stream
while (true)
{
while (!stream.DataAvailable)
{
;
}
Byte[] bytes = new Byte[client.Available];
await stream.ReadAsync(bytes, 0, bytes.Length);
//translate bytes of request to string
String data = Encoding.UTF8.GetString(bytes);
if (new Regex("^GET").IsMatch(data))
{
DebugWriter.Write(data);
const string eol = "\r\n"; // HTTP/1.1 defines the sequence CR LF as the end-of-line marker
Byte[] response = Encoding.UTF8.GetBytes("HTTP/1.1 101 Switching Protocols" + eol
+ "Connection: Upgrade" +
eol
+ "Upgrade: websocket" +
eol
+ "Sec-WebSocket-Accept: " +
Convert.ToBase64String(
System.Security
.Cryptography
.SHA1.Create()
.ComputeHash(
Encoding
.UTF8
.GetBytes(
new
System
.Text
.RegularExpressions
.Regex(
"Sec-WebSocket-Key: (.*)")
.Match(
data)
.Groups
[1]
.Value
.Trim() +
"258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
)
)
) + eol
+ eol);
await stream.WriteAsync(response, 0, response.Length);
}
else if (bytes[0] != 138)
{
DebugWriter.Write(GetMessage(bytes));
string responseString = GetMessage(bytes);
byte[] response = DataFrame(WebSocketDatatype.Text, Encoding.UTF8.GetBytes(responseString));
//DebugWriter.Write(bytes.Length);
await stream.WriteAsync(response, 0, response.Length);
}
}
}
private static string GetMessage(Byte[] bytes)
{
string DETEXT = "";
if (bytes[0] == 129)
{
int position = 0;
int Type = 0;
ulong length = 0;
if (bytes[1] - 128 >= 0 && bytes[1] - 128 <= 125)
{
length = (ulong)bytes[1] - 128;
position = 2;
}
else if (bytes[1] - 128 == 126)
{
Type = 1;
length = (ulong)256 * bytes[2] + bytes[3];
position = 4;
}
else if (bytes[1] - 128 == 127)
{
Type = 2;
for (int i = 0; i < 8; i++)
{
ulong pow = Convert.ToUInt64(Math.Pow(256, (7 - i)));
length = length + bytes[2 + i] * pow;
position = 10;
}
}
else
{
Type = 3;
DebugWriter.Write("error 1");
}
if (Type < 3)
{
Byte[] key = new Byte[4]
{
bytes[position], bytes[position + 1], bytes[position + 2], bytes[position + 3]
};
Byte[] decoded = new Byte[bytes.Length - (4 + position)];
Byte[] encoded = new Byte[bytes.Length - (4 + position)];
for (long i = 0; i < bytes.Length - (4 + position); i++)
{
encoded[i] = bytes[i + position + 4];
}
for (int i = 0; i < encoded.Length; i++)
{
decoded[i] = (Byte)(encoded[i] ^ key[i % 4]);
}
DETEXT = Encoding.UTF8.GetString(decoded);
}
}
else
{
DebugWriter.Write("error 2: " + bytes[0].ToString());
}
return(DETEXT);
}
